[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:716":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":11,"polytypeof":11,"groupid":12,"weighting":13,"nolocadd":14,"blacklisted":14,"mindat_formula":15,"mindat_formula_note":11,"ima_formula":16,"elements":17,"sigelements":24,"key_elements":25,"impurities":26,"cim":27,"ima_status":28,"ima_notes":11,"ima_history":11,"approval_year":11,"publication_year":31,"discovery_year":32,"strunz10ed1":33,"strunz10ed2":34,"strunz10ed3":21,"strunz10ed4":35,"dana8ed1":36,"dana8ed2":37,"dana8ed3":38,"dana8ed4":39,"csystem":40,"cclass":41,"spacegroup":42,"spacegroupset":43,"a":44,"b":45,"c":46,"alpha":43,"beta":47,"gamma":43,"aerror":48,"berror":49,"cerror":49,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":11,"z":48,"csmetamict":14,"commentcrystal":11,"twinning":11,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":50,"tlform":51,"hmin":52,"hmax":41,"hardtype":11,"vhnmin":43,"vhnmax":43,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":53,"dmeas2":53,"dcalc":54,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":55,"lustretype":56,"commentluster":57,"diapheny":58,"streak":59,"colour":60,"commentcolor":11,"colors":61,"streak_colors":66,"luminescence":11,"uv":11,"cleavage":67,"cleavagetype":68,"fracturetype":69,"tenacity":70,"commentbreak":11,"opticaltype":71,"opticalsign":72,"opticalalpha":73,"opticalalpha2":74,"opticalalphaerror":11,"opticalbeta":75,"opticalbeta2":76,"opticalbetaerror":11,"opticalgamma":77,"opticalgamma2":78,"opticalgammaerror":11,"opticalomega":43,"opticalomega2":43,"opticalomegaerror":11,"opticalepsilon":43,"opticalepsilon2":43,"opticalepsilonerror":11,"opticaln":43,"opticaln2":43,"opticalnerror":11,"optical2vcalc":43,"optical2vcalc2":43,"optical2vcalcerror":11,"optical2vmeasured":43,"optical2vmeasured2":43,"optical2vmeasurederror":11,"rimin":79,"rimax":80,"opticaldispersion":81,"opticalpleochroism":82,"opticalpleochorismdesc":83,"opticalbirefringence":84,"opticalcomments":11,"opticalcolour":11,"opticalinternal":11,"opticaltropic":11,"opticalanisotropism":11,"opticalbireflectance":11,"opticalextinction":11,"opticalr":11,"specdispm":11,"ir":11,"electrical":11,"magnetism":11,"thermalbehaviour":11,"other":11,"industrial":11,"occurrence":85,"otheroccurrence":86,"type_specimen_store":87,"description_short":88,"aboutname":89,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":90,"reviewed_at":11,"variety_of":11,"varieties":91,"group_members":92,"associates":115,"confused_with":125,"type_localities":126,"occurrence_total":133,"citations":134,"images":213,"structures":398,"synonyms":411,"language_names":413,"wikidata_qid":481,"texts":482},716,"1:1:716:0","cb9b4706-f13e-4703-be4a-c83143a8513b","Boltwoodite","Bwd",0,"mineral",null,32172,2645,false,"(K,Na)(UO\u003Csub>2\u003C\u002Fsub>)(SiO\u003Csub>3\u003C\u002Fsub>OH)·1.5H\u003Csub>2\u003C\u002Fsub>O","(K,Na)(UO\u003Csub>2\u003C\u002Fsub>)(SiO\u003Csub>3\u003C\u002Fsub>OH) · 1.5H\u003Csub>2\u003C\u002Fsub>O",[18,19,20,21,22,23],"Na","Si","O","K","H","U",[19,20,21,22,23],[23],"Fe,Ca,Na","14.16.6",[29,30],"APPROVED","GRANDFATHERED",1956,"1956","9","A","15","53","3","1","5","Monoclinic",4,9,"0","7.073","7.064","6.638","105.45",2,1,"Radiating acicular to fibrous crystals, also earthy pseudomorphs of uranium minerals.","Wart-like aggregates of fibers coating fractures in sandstone. ",3.5,"4.7","4.46","Pearly, Vitreous, Silky","Sub-Vitreous,Waxy,Silky","Aggregates vitreous to silky, dull to earthy in pseudomorphs","Translucent","White","Pale yellow, orange yellow",[62,63,64,65],"yellow","orange","colorless","white",[65],"Perfect on {010}, imperfect on {001}.","Perfect","Irregular\u002FUneven","brittle","Biaxial","-","1.668","1.670","1.695","1.696","1.698","1.703",1.668,1.703,"r > v or r \u003C v","Weak","X = colorless; Y = Z = yellow.","0.007-0.008","An oxidation product of primary black U ores.","Alteration zone around uranium deposits.","National Museum of Natural History, Washington, D.C., USA, 112710.","Rod-like to acicular yellow crystals in radial groups.\r\n\r\nCompare also natroboltwoodite.","For Bertram Borden Boltwood (1870-1927), radiochemist at Yale University, New Haven, Connecticut, USA. Named by Clifford Frondel and Jun Ito.","2025-08-11 12:14:18",[],[93,101,109],{"id":94,"name":95,"entrytype":9,"csystem":96,"ima_formula":97,"mindat_formula":98,"hmin":11,"hmax":11,"dmeas":99,"dcalc":100,"primary_image_id":11},3692,"Natroboltwoodite","Orthorhombic","Na(UO\u003Csub>2\u003C\u002Fsub>)(SiO\u003Csub>3\u003C\u002Fsub>OH) · H\u003Csub>2\u003C\u002Fsub>O","Na(UO\u003Csub>2\u003C\u002Fsub>)(SiO\u003Csub>3\u003C\u002Fsub>OH)·H\u003Csub>2\u003C\u002Fsub>O","4.1","4.4",{"id":102,"name":103,"entrytype":9,"csystem":40,"ima_formula":104,"mindat_formula":105,"hmin":106,"hmax":107,"dmeas":43,"dcalc":43,"primary_image_id":108},4106,"Parauranophane","Ca(UO\u003Csub>2\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(SiO\u003Csub>3\u003C\u002Fsub>OH)\u003Csub>2\u003C\u002Fsub> · 5H\u003Csub>2\u003C\u002Fsub>O","Ca(UO\u003Csub>2\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(SiO\u003Csub>3\u003C\u002Fsub>OH)\u003Csub>2\u003C\u002Fsub>·5H\u003Csub>2\u003C\u002Fsub>O",2.5,3,18770,{"id":110,"name":111,"entrytype":9,"csystem":40,"ima_formula":104,"mindat_formula":105,"hmin":48,"hmax":107,"dmeas":112,"dcalc":113,"primary_image_id":114},4107,"Uranophane","3.8","3.78",27083,[116],{"id":117,"name":118,"entrytype":9,"csystem":119,"ima_formula":120,"mindat_formula":121,"hmin":106,"hmax":106,"dmeas":122,"dcalc":123,"primary_image_id":124},219,"Andersonite","Trigonal","Na\u003Csub>2\u003C\u002Fsub>Ca(UO\u003Csub>2\u003C\u002Fsub>)(CO\u003Csub>3\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub> · 5-6H\u003Csub>2\u003C\u002Fsub>O","Na\u003Csub>2\u003C\u002Fsub>Ca(UO\u003Csub>2\u003C\u002Fsub>)(CO\u003Csub>3\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>·6H\u003Csub>2\u003C\u002Fsub>O","2.8","2.86",1347,[],[127],{"id":128,"txt":129,"latitude":130,"longitude":131,"country":132},4377,"Pick's Delta Mine, San Rafael Swell Mining District, Emery County, Utah, USA",38.56349,-110.94395,"USA",78,[135,139,143,147,152,156,159,163,167,171,175,179,183,188,193,198,203,208],{"id":136,"year":31,"html":137,"doi":138},2179691,"FRONDEL, C., ITO, J. (1956) Boltwoodite, a New Uranium Silicate. \u003Ci>Science\u003C\u002Fi>, 124 (3228). 931 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1126\u002Fscience.124.3228.931'>doi:10.1126\u002Fscience.124.3228.931\u003C\u002Fa>","10.1126\u002Fscience.124.3228.931",{"id":140,"year":141,"html":142,"doi":11},522915,1957,"Fleischer, M. (1957) New mineral names. \u003Ci>American Mineralogist\u003C\u002Fi>,  42 (3-4). 307-308 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM42\u002FAM42_307.pdf?reftype=.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":144,"year":145,"html":146,"doi":11},523483,1961,"Honea, Russell M. (1961) New data on boltwoodite, an alkali uranyl silicate. \u003Ci>American Mineralogist\u003C\u002Fi>,  46 (1-2) 12-25 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM46\u002FAM46_12.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":148,"year":149,"html":150,"doi":151},81497,1974,"KATO, TOSHIO, MIURA, YASUNORI (1974) Cell Dimensions of Boltwoodite. \u003Ci>Mineralogical Journal\u003C\u002Fi>,  7 (4). 400-404 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2465\u002Fminerj1953.7.400'>doi:10.2465\u002Fminerj1953.7.400\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Fwww.jstage.jst.go.jp\u002Farticle\u002Fminerj1953\u002F7\u002F4\u002F7_4_400\u002F_pdf' class='refpdflink'>\u003C\u002Fa>","10.2465\u002Fminerj1953.7.400",{"id":153,"year":154,"html":155,"doi":11},527618,1981,"Stohl, Frances V., Smith, Deane K. (1981) The crystal chemistry of the uranyl silicate minerals. \u003Ci>American Mineralogist\u003C\u002Fi>,  66 (5-6) 610-624 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM66\u002FAM66_610.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":157,"year":154,"html":158,"doi":11},16103537,"Strunz, H., Tennyson, C. (1981). Symmetry and twinning in boltwoodite. Soviet Physics-Crystallography: 26(6): 732-735.",{"id":160,"year":161,"html":162,"doi":11},16103538,1983,"Strunz, H., Tennyson, C. (1983) Boltwoodit aus S.W. Afrika. Der Aufschluss: 34: 497-501.",{"id":164,"year":165,"html":166,"doi":11},16103539,1984,"Bayushkin, I.M., Butler, A.S., Gurvich, M.Y. (1984) New data on boltwoodite. Izvestiya Vysshikh Uchebnykh Zavedenij, Geologiya i Razvedka: 50-56.",{"id":168,"year":169,"html":170,"doi":11},16103540,1990,"Pu, C. (1990) Boltwoodite discovered for the first time in China. Acta Mineralogica Sinica: 10: 151-160.",{"id":172,"year":173,"html":174,"doi":11},16925706,1997,"Vochten, R., Blaton, N., Peeters, O., Van Springel, K., Van Haverbeke, L. (1997) A new method of synthesis of boltwoodite and of formation of sodium boltwoodite, uranophane, sklodowskite and kasolite from boltwoodite. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  35 (3) 735-741 \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Frruff_1.0\u002Fuploads\u002FCM35_735.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":176,"year":177,"html":178,"doi":11},16926125,1998,"Burns, P. C. (1998) The structure of boltwoodite and implications of solid-solution towards sodium boltwoodite. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  36 (4) 1069-1075 \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Frruff_1.0\u002Fuploads\u002FCM36_1069.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":180,"year":181,"html":182,"doi":11},16963300,2001,"(2001) Boltwoodite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fboltwoodite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":184,"year":185,"html":186,"doi":187},64215,2005,"Burns, Peter C. (2005) U\u003Csup>6+\u003C\u002Fsup> minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  43 (6) 1839-1894 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2113\u002Fgscanmin.43.6.1839'>doi:10.2113\u002Fgscanmin.43.6.1839\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fcm\u002Fvol43\u002FCM43_1839.pdf' class='refpdflink'>\u003C\u002Fa>","10.2113\u002Fgscanmin.43.6.1839",{"id":189,"year":190,"html":191,"doi":192},2425651,2006,"Frost, Ray L., Čejka, Jiří, Weier, Matt L, Martens, Wayde (2006) Molecular structure of the uranyl silicates—a Raman spectroscopic study. \u003Ci>Journal of Raman Spectroscopy\u003C\u002Fi>, 37 (4). 538-551 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1002\u002Fjrs.1430'>doi:10.1002\u002Fjrs.1430\u003C\u002Fa>","10.1002\u002Fjrs.1430",{"id":194,"year":195,"html":196,"doi":197},16103544,2009,"Arnold, Thuro, Baumann, Nils (2009) Boltwoodite [K(UO2)(SiO3OH)(H2O)1.5] and compreignacite K2[(UO2)3O2(OH)3]2·7H2O characterized by laser fluorescence spectroscopy. \u003Ci>Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy\u003C\u002Fi>,  71 (5). 1964-1968 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002Fj.saa.2008.07.029'>doi:10.1016\u002Fj.saa.2008.07.029\u003C\u002Fa>","10.1016\u002Fj.saa.2008.07.029",{"id":199,"year":200,"html":201,"doi":202},354270,2011,"Shvareva, Tatiana Y., Mazeina, Lena, Gorman-Lewis, Drew, Burns, Peter C., Szymanowski, Jennifer E.S., Fein, Jeremy B., Navrotsky, Alexandra (2011) Thermodynamic characterization of boltwoodite and uranophane: Enthalpy of formation and aqueous solubility. \u003Ci>Geochimica et Cosmochimica Acta\u003C\u002Fi>,  75 (18) 5269-5282 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002Fj.gca.2011.06.041'>doi:10.1016\u002Fj.gca.2011.06.041\u003C\u002Fa>","10.1016\u002Fj.gca.2011.06.041",{"id":204,"year":205,"html":206,"doi":207},13826250,2022,"Frankland, Victoria L., Rickman, Sam P., Milodowski, Antoni E., Read, David (2022) Characterisation of Uranophane and Boltwoodite by Raman, luminescence and laser-induced breakdown spectroscopy. \u003Ci>Applied Geochemistry\u003C\u002Fi>,  138. 105183 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002Fj.apgeochem.2021.105183'>doi:10.1016\u002Fj.apgeochem.2021.105183\u003C\u002Fa>","10.1016\u002Fj.apgeochem.2021.105183",{"id":209,"year":210,"html":211,"doi":212},18779351,2025,"Chamberlain, Carmen E.; Szymanowski, Jennifer E.S.; Burns, Peter C. (2025) High-pressure single-crystal X-ray diffraction and Raman spectroscopy of boltwoodite, K0.63Na0.37[(UO2)(SiO3OH)](H2O)1.5. \u003Ci>American Mineralogist\u003C\u002Fi>,  110 (8).  \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam-2024-9531'>doi:10.2138\u002Fam-2024-9531\u003C\u002Fa>","10.2138\u002Fam-2024-9531",[214,224,232,239,246,254,262,270,279,289,296,302,309,316,322,331,340,350,358,365,372,379,386,392],{"id":215,"source_url":216,"license_code":217,"credit_html":218,"title":219,"description":220,"author":221,"original_width":222,"original_height":223},3605,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10127103","CC BY-SA 3.0","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10127103\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-39013.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Goanikontes Claim, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArandis\" class=\"extiw\" title=\"en:Arandis\">Arandis\u003C\u002Fa>, Swakopmund District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7864.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Boltwoodite is common enough in \"reference specimens\" but this is absolutely incredible and stands far above the average. Truly, its outsanding. 4.5 x 4 x 3.8 cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",582,800,{"id":225,"source_url":226,"license_code":217,"credit_html":227,"title":228,"description":229,"author":221,"original_width":230,"original_height":231},36416,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10124539","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10124539\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-34735.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Goanikontes Claim, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArandis\" class=\"extiw\" title=\"en:Arandis\">Arandis\u003C\u002Fa>, Swakopmund District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7864.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>The orange to yellow boltwoodite is contrasted on the best possible matrix from this locality, a contrasting black quilt of dark calcite. 5.2 x 3 x 2cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",429,600,{"id":233,"source_url":234,"license_code":217,"credit_html":235,"title":236,"description":237,"author":221,"original_width":223,"original_height":238},3606,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10137252","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10137252\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-69288.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Goanikontes Claim, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArandis\" class=\"extiw\" title=\"en:Arandis\">Arandis\u003C\u002Fa>, Swakopmund District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7864.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 1.8 x 1.7 x 1.4 cm.\u003C\u002Fdd>\n\u003Cdd>A lovely thumbnail consisting of very fine acicular crystals of umber-yellow boltwoodite. The needles exhibit both a radial growth and a vertical cluster habit not unlike what you see in some palms, and are superb in both color and habit. Tim Blackwood Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",580,{"id":240,"source_url":241,"license_code":217,"credit_html":242,"title":243,"description":244,"author":221,"original_width":245,"original_height":223},3607,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10159082","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10159082\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-201151.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Goanikontes Claim, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArandis\" class=\"extiw\" title=\"en:Arandis\">Arandis\u003C\u002Fa>, Swakopmund District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7864.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 8.8 x 6.9 x 5.2 cm.\u003C\u002Fdd>\n\u003Cdd>A large boltwoodite specimen with fine crystals with excellent color and color contrast to the dark calcite beneath. The largest cluster here is 1 cm across.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",773,{"id":247,"source_url":248,"license_code":217,"credit_html":249,"title":250,"description":251,"author":221,"original_width":252,"original_height":253},36417,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10137251","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10137251\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-69287.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Goanikontes Claim, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArandis\" class=\"extiw\" title=\"en:Arandis\">Arandis\u003C\u002Fa>, Swakopmund District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7864.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 1.1 x 1.0 x 0.9 cm.\u003C\u002Fdd>\n\u003Cdd>A small but incredibly dense aggregate of intense yellow boltwoodite crystals, from a very old find at this classic locale for the species.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",732,636,{"id":255,"source_url":256,"license_code":217,"credit_html":257,"title":258,"description":259,"author":221,"original_width":260,"original_height":261},3608,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161532","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161532\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-216029.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Goanikontes Claim, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArandis\" class=\"extiw\" title=\"en:Arandis\">Arandis\u003C\u002Fa>, Swakopmund District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7864.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 4.1 x 3.0 x 2.8 cm.\u003C\u002Fdd>\n\u003Cdd>Boltwoodite is a rare potassium, sodium, uranium silicate. This superb and rich miniature specimen features a well-placed, 3.4 cm vug filled with radial clusters of bright, golden-yellow boltwoodite needles in a calcite-rich matrix. Ex. Mullane Collection, so this would be an old specimen from finds here in the late 1960s and early 1970s.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",597,700,{"id":263,"source_url":264,"license_code":217,"credit_html":265,"title":266,"description":267,"author":221,"original_width":268,"original_height":269},3609,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10165487","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10165487\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-240593.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Goanikontes Claim, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArandis\" class=\"extiw\" title=\"en:Arandis\">Arandis\u003C\u002Fa>, Swakopmund District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7864.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 2.5 x 1.7 x 1.1 cm.\u003C\u002Fdd>\n\u003Cdd>A superb pair of radial Boltwoodite clusters on matrix. The larger of these lustrous, bright-orange clusters is 1.2 cm across with a few gemmy individual crystals reaching .1-.2 cm in length. The first great discovery of Boltwoodite from Goanikontes came in the late 1970's. Ex. Charlie Key Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",500,458,{"id":271,"source_url":272,"license_code":217,"credit_html":273,"title":274,"description":275,"author":276,"original_width":277,"original_height":278},3611,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32515999","BLFrank, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=32515999\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodit - Goanikontes, Namibia.jpg","Orange-brown needles of boltwoodite on smoky quartz from Goanikontes claim, Namibia","BLFrank",5616,3744,{"id":280,"source_url":281,"license_code":282,"credit_html":283,"title":284,"description":285,"author":286,"original_width":287,"original_height":288},3612,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=112158506","CC BY-SA 4.0","Klaproth, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=112158506\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite Goanikontes 13mm needles.jpg","Boltwoodite from Goanikontes Claim with crystals of 13 mm in length","Klaproth",1935,1542,{"id":290,"source_url":291,"license_code":217,"credit_html":292,"title":293,"description":244,"author":221,"original_width":294,"original_height":295},36420,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10159084","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10159084\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-201152.jpg",400,273,{"id":297,"source_url":298,"license_code":217,"credit_html":299,"title":300,"description":259,"author":221,"original_width":301,"original_height":231},36421,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161533","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10161533\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-216030.jpg",507,{"id":303,"source_url":304,"license_code":217,"credit_html":305,"title":306,"description":307,"author":221,"original_width":294,"original_height":308},36422,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10453823","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10453823\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-mun08rad-01b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Rössing Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArandis\" class=\"extiw\" title=\"en:Arandis\">Arandis\u003C\u002Fa>, Swakopmund District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3085.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 8.8 x 6.9 x 5.2 cm\n\u003Cdl>\u003Cdt>Boltwoodite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>I have seen a large number of boltwoodite specimens over the years, but seldom have i seen a piece with all the attributes of this one: excellent coverage in a large specimen; color and color contrast to the dark calcite beneath; and overall quality to the crystals. Seldom do you get all this in a nice, rich, display-worthy specimen. Boltwoodite is both rare and beautiful, and the pieces from this locality are the best from the collector's point of view in my opinion. This piece, for the size and overall display, is one of the very best I have seen for sale in years. The largest cluster here is 1 cm across ! (mid-left, protected in pocket depths)\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",281,{"id":310,"source_url":311,"license_code":217,"credit_html":312,"title":313,"description":314,"author":221,"original_width":294,"original_height":315},36425,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10460833","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10460833\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-rare08-2-44a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Rössing Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArandis\" class=\"extiw\" title=\"en:Arandis\">Arandis\u003C\u002Fa>, Swakopmund District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3085.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: thumbnail, 1.1 x 1.0 x 0.9 cm\n\u003Cdl>\u003Cdt>Boltwoodite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A small but incredibly dense aggregate of intense yellow boltwoodite crystals, from a very old find at this classic locale for the species. Interestingly, the specimen is SO dense and unusual for a boltwoodite, that at the time it was mislabelled as tsumcorite when sold with other African minerals, and ended up in a US collection labelled as tsumcorite (from Tsumeb).\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",393,{"id":317,"source_url":318,"license_code":217,"credit_html":319,"title":320,"description":314,"author":221,"original_width":321,"original_height":294},36426,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10460834","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10460834\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-rare08-2-44b.jpg",383,{"id":323,"source_url":324,"license_code":217,"credit_html":325,"title":326,"description":327,"author":328,"original_width":329,"original_height":330},36427,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=14866276","Leon Hupperichs, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=14866276\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-99351.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Repete Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBlanding\" class=\"extiw\" title=\"en:Blanding\">Blanding\u003C\u002Fa>, San Juan County, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FUtah\" class=\"extiw\" title=\"en:Utah\">Utah\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-4177.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Field of view 3 mm. Specimen and photo Leon Hupperichs.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Leon Hupperichs",797,572,{"id":332,"source_url":333,"license_code":282,"credit_html":334,"title":335,"description":336,"author":337,"original_width":338,"original_height":339},36428,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=42027479","Weirdmeister, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=42027479\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite.JPG","old specimen of Boltwoodite, Arandis, Namibia, 90k cpm @ 44-9 Probe, width:7cm","Weirdmeister",3264,2176,{"id":341,"source_url":342,"license_code":343,"credit_html":344,"title":345,"description":346,"author":347,"original_width":348,"original_height":349},36430,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84649981","CC BY 2.0","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84649981\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite (Rössing Uranium Mine, Erongo, Namibia) (26536687723).jpg","\u003Cp>Boltwoodite from Namibia. (Robert Lauf collection)\n\u003C\u002Fp>\u003Cp>A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties.  At its simplest, a mineral is a naturally-occurring solid chemical.  Currently, there are over 4900 named and described minerals - about 200 of them are common and about 20 of them are very common.  Mineral classification is based on anion chemistry.  Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.\n\u003C\u002Fp>\u003Cp>The silicates are the most abundant and chemically complex group of minerals.  All silicates have silica as the basis for their chemistry.  \"Silica\" refers to SiO2 chemistry.  The fundamental molecular unit of silica is one small silicon atom surrounded by four large oxygen atoms in the shape of a triangular pyramid - this is the silica tetrahedron - SiO4.  Each oxygen atom is shared by two silicon atoms, so only half of the four oxygens \"belong\" to each silicon.  The resulting formula for silica is thus SiO2, not SiO4.\n\u003C\u002Fp>\u003Cp>Boltwoodite is a scarce hydrous potassium sodium uranyl hydroxy-silicate mineral, (K,Na)(UO2)(SiO3OH)·1.5H2O.  It has a nonmetallic luster, a yellowish color, is about 3.5 to 4 on the Mohs Hardness Scale, usually forms radiating clusters of elongated crystals or earthy masses, and is radioactive.  Boltwoodite is a secondary uranium mineral that forms by alteration of uraninite (or other primary U minerals) in an oxidizing environment.  The original U+4 ions in uraninite get oxidized into U+6 and usually become incorporated into uranyl ions, (UO2)+2.  In the presence of water and potassium and sodium and silica, boltwoodite can form.\n\u003C\u002Fp>\u003Cp>The specimen of radiating boltwoodite crystals on matrix seen here is from the Rössing Uranium Mine in Namibia, Africa.  Uraniferous granites are mined and processed for eventual use in nuclear power plants.  The host rocks for the uranium minerals at the Rössing Mine are sheeted leucogranites of early Middle Cambrian age (~508 Ma).\n\u003C\u002Fp>\u003Cp>Locality: Rössing Uranium Mine, southeast of the town of Arandis, Erongo Region, western Namibia, southwestern Africa (vicinity of 22° 28' 41.00\" South latitude, 15° 03' 36.00\" East longitude)\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Photo gallery of boltwoodite:\n\u003C\u002Fp>\n<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.mindat.org\u002Fgallery.php?min=716\">http:\u002F\u002Fwww.mindat.org\u002Fgallery.php?min=716\u003C\u002Fa>\" rel=\"nofollow\">www.mindat.org\u002Fgallery.php?min=716<\u002Fa>","James St. John",1391,1515,{"id":351,"source_url":352,"license_code":343,"credit_html":353,"title":354,"description":355,"author":347,"original_width":356,"original_height":357},36431,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84649982","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84649982\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite (Delta Mine, Emery County, Utah, USA) 1 (26866726600).jpg","\u003Cp>Boltwoodite from Utah, USA. (Robert Lauf collection)\n\u003C\u002Fp>\u003Cp>A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties.  At its simplest, a mineral is a naturally-occurring solid chemical.  Currently, there are over 4900 named and described minerals - about 200 of them are common and about 20 of them are very common.  Mineral classification is based on anion chemistry.  Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.\n\u003C\u002Fp>\u003Cp>The silicates are the most abundant and chemically complex group of minerals.  All silicates have silica as the basis for their chemistry.  \"Silica\" refers to SiO2 chemistry.  The fundamental molecular unit of silica is one small silicon atom surrounded by four large oxygen atoms in the shape of a triangular pyramid - this is the silica tetrahedron - SiO4.  Each oxygen atom is shared by two silicon atoms, so only half of the four oxygens \"belong\" to each silicon.  The resulting formula for silica is thus SiO2, not SiO4.\n\u003C\u002Fp>\u003Cp>Boltwoodite is a scarce hydrous potassium sodium uranyl hydroxy-silicate mineral, (K,Na)(UO2)(SiO3OH)·1.5H2O.  It has a nonmetallic luster, a yellowish color, is about 3.5 to 4 on the Mohs Hardness Scale, usually forms earthy masses or radiating clusters of elongated crystals, and is radioactive.  Boltwoodite is a secondary uranium mineral that forms by alteration of uraninite (or other primary U minerals) in an oxidizing environment.  The original U+4 ions in uraninite get oxidized into U+6 and usually become incorporated into uranyl ions, (UO2)+2.  In the presence of water and potassium and sodium and silica, boltwoodite can form.\n\u003C\u002Fp>\u003Cp>Shown above is an apparent quartzose pebbly sandstone (= brown) with earthy boltwoodite (= yellow).  This comes from a uranium-vanadium mine in central Utah where mineralization is developed in siliciclastic sedimentary rocks of the Chinle Formation (Upper Triassic).  Mineralization occurred during the Paleocene.\n\u003C\u002Fp>\u003Cp>Locality: Delta Mine, Emery County, central Utah, USA (see locality info. at: <a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-4377.html\">http:\u002F\u002Fwww.mindat.org\u002Floc-4377.html\u003C\u002Fa>\" rel=\"nofollow\">www.mindat.org\u002Floc-4377.html<\u002Fa>)\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Photo gallery of boltwoodite:\n\u003C\u002Fp>\n<a href=\"\u003Ca rel=\"nofollow\" class=\"external free\" href=\"http:\u002F\u002Fwww.mindat.org\u002Fgallery.php?min=716\">http:\u002F\u002Fwww.mindat.org\u002Fgallery.php?min=716\u003C\u002Fa>\" rel=\"nofollow\">www.mindat.org\u002Fgallery.php?min=716<\u002Fa>",3009,2131,{"id":359,"source_url":360,"license_code":343,"credit_html":361,"title":362,"description":355,"author":347,"original_width":363,"original_height":364},36432,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84649983","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=84649983\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite (Delta Mine, Emery County, Utah, USA) 2 (26536898183).jpg",2915,1991,{"id":366,"source_url":367,"license_code":217,"credit_html":368,"title":369,"description":370,"author":221,"original_width":371,"original_height":315},36418,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10149075","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10149075\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-Calcite-167930.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalcite\" class=\"extiw\" title=\"en:Calcite\">Calcite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Goanikontes Claim, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArandis\" class=\"extiw\" title=\"en:Arandis\">Arandis\u003C\u002Fa>, Swakopmund District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7864.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 9.3 x 7.0 x 3.5 cm.\u003C\u002Fdd>\n\u003Cdd>Boltwoodite is a rare potassium uranyl silicate. This very fine specimen features a horizontal band of radial clusters of super-bright, lemon-yellow boltwoodite needles proudly marching across a large vug covered with smoky-brown calcite scalenohedrons. Ex. Rob Smith Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",506,{"id":373,"source_url":374,"license_code":217,"credit_html":375,"title":376,"description":377,"author":221,"original_width":294,"original_height":378},3610,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10457840","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10457840\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-Calcite-rare08-2-02b.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalcite\" class=\"extiw\" title=\"en:Calcite\">Calcite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Rössing Mine, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArandis\" class=\"extiw\" title=\"en:Arandis\">Arandis\u003C\u002Fa>, Swakopmund District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3085.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: small cabinet, 7.1 x 5.0 x 2.2 cm\n\u003Cdl>\u003Cdt>Boltwoodite on Calcite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>Freestanding, 3-dimensional sprays of fine boltwoodite xls to 8mm make this a superb species specimen, but also overall its quite unusually aesthetic. Rare in this quality, boltwoodite comes at its best from this uranium mine.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",332,{"id":380,"source_url":381,"license_code":217,"credit_html":382,"title":383,"description":384,"author":221,"original_width":385,"original_height":223},36419,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10158592","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10158592\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-Calcite-199616.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FBoltwoodite\" class=\"extiw\" title=\"en:Boltwoodite\">Boltwoodite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FCalcite\" class=\"extiw\" title=\"en:Calcite\">Calcite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Goanikontes Claim, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FArandis\" class=\"extiw\" title=\"en:Arandis\">Arandis\u003C\u002Fa>, Swakopmund District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FErongo_Region\" class=\"extiw\" title=\"en:Erongo Region\">Erongo Region\u003C\u002Fa>, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-7864.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 9.2 x 7.1 x 5.7 cm.\u003C\u002Fdd>\n\u003Cdd>Boltwoodite is a rare potassium sodium uranyl silicate. This fine specimen features a well-placed, 3.8 cm vug highlighted with radial clusters of super-bright, lemon-yellow boltwoodite needles. The vug is lined with smoky-brown calcite scalenohedrons and the boltwoodite clusters surround a 1.7 cm, lustrous, colorless calcite scalenohedron. Ex. Rob Smith Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",665,{"id":387,"source_url":388,"license_code":217,"credit_html":389,"title":390,"description":377,"author":221,"original_width":223,"original_height":391},36423,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10457839","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10457839\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-Calcite-rare08-2-02a.jpg",603,{"id":393,"source_url":394,"license_code":217,"credit_html":395,"title":396,"description":377,"author":221,"original_width":397,"original_height":294},36424,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10457842","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10457842\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Boltwoodite-Calcite-rare08-2-02c.jpg",342,[399,405],{"id":400,"url":401,"label":402,"formula":403,"spacegroup":404,"year":177},1733,"\u002Fcif\u002F1733.cif","Burns 1998","U Si K.56 Na.21 O7.27 H3.54","P 1 21\u002Fm 1",{"id":406,"url":407,"label":408,"formula":409,"spacegroup":410,"year":154},1734,"\u002Fcif\u002F1734.cif","Stohl 1981","U K Si O7 H2","P 1 21 1",[412],"Boltwoodiet",[414,418,422,427,431,435,438,441,444,448,452,455,459,462,466,469,473,477],{"lang":415,"names":416},"ca",[417],"boltwoodita",{"lang":419,"names":420},"de",[421],"Boltwoodit",{"lang":423,"names":424},"el",[425,426],"Μπολντγουντίτης","Μπολτγουντίτης",{"lang":428,"names":429},"es",[430],"Boltwoodita",{"lang":432,"names":433},"et",[434],"boltvudiit",{"lang":436,"names":437},"eu",[430],{"lang":439,"names":440},"fr",[7],{"lang":442,"names":443},"it",[7],{"lang":445,"names":446},"ja",[447],"ボルトウッド石",{"lang":449,"names":450},"mk",[451],"Болтвудит",{"lang":453,"names":454},"mn",[451],{"lang":456,"names":457},"nb",[458],"boltwooditt",{"lang":460,"names":461},"nn",[458],{"lang":463,"names":464},"pl",[465],"Boltwoodyt",{"lang":467,"names":468},"ru",[451],{"lang":470,"names":471},"sl",[472],"Boltvudit",{"lang":474,"names":475},"uk",[451,476],"Болтвудіт",{"lang":478,"names":479},"zh",[480],"硅钾铀矿","Q3641922",{"history":11,"applications":11}]