[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:4196":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":11,"polytypeof":11,"groupid":11,"weighting":12,"nolocadd":13,"blacklisted":13,"mindat_formula":14,"mindat_formula_note":11,"ima_formula":14,"elements":15,"sigelements":20,"key_elements":21,"impurities":11,"cim":22,"ima_status":23,"ima_notes":11,"ima_history":11,"approval_year":25,"publication_year":26,"discovery_year":11,"strunz10ed1":27,"strunz10ed2":28,"strunz10ed3":29,"strunz10ed4":30,"dana8ed1":31,"dana8ed2":32,"dana8ed3":32,"dana8ed4":33,"csystem":34,"cclass":35,"spacegroup":36,"spacegroupset":37,"a":38,"b":39,"c":40,"alpha":41,"beta":42,"gamma":41,"aerror":35,"berror":43,"cerror":43,"alphaerror":11,"betaerror":44,"gammaerror":11,"va3":45,"z":43,"csmetamict":13,"commentcrystal":11,"twinning":46,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":11,"tlform":47,"hmin":48,"hmax":48,"hardtype":11,"vhnmin":49,"vhnmax":41,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":50,"dmeas2":51,"dcalc":52,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":11,"lustretype":53,"commentluster":54,"diapheny":55,"streak":11,"colour":56,"commentcolor":11,"colors":57,"streak_colors":11,"luminescence":11,"uv":60,"cleavage":61,"cleavagetype":62,"fracturetype":63,"tenacity":11,"commentbreak":11,"opticaltype":64,"opticalsign":65,"opticalalpha":66,"opticalalpha2":41,"opticalalphaerror":67,"opticalbeta":68,"opticalbeta2":41,"opticalbetaerror":67,"opticalgamma":69,"opticalgamma2":41,"opticalgammaerror":67,"opticalomega":41,"opticalomega2":41,"opticalomegaerror":11,"opticalepsilon":41,"opticalepsilon2":41,"opticalepsilonerror":11,"opticaln":41,"opticaln2":41,"opticalnerror":11,"optical2vcalc":41,"optical2vcalc2":41,"optical2vcalcerror":11,"optical2vmeasured":70,"optical2vmeasured2":71,"optical2vmeasurederror":11,"rimin":72,"rimax":73,"opticaldispersion":74,"opticalpleochroism":11,"opticalpleochorismdesc":11,"opticalbirefringence":11,"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":11,"otheroccurrence":11,"type_specimen_store":75,"description_short":76,"aboutname":77,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":78,"reviewed_at":11,"variety_of":11,"varieties":79,"group_members":80,"associates":81,"confused_with":155,"type_localities":156,"occurrence_total":163,"citations":164,"images":216,"structures":257,"synonyms":273,"language_names":275,"wikidata_qid":298,"texts":299},4196,"1:1:4196:2","e7e0931d-1f7b-4e4b-b725-f19b5b7d1e0e","Vlasovite","Vsv",0,"mineral",null,780,false,"Na\u003Csub>2\u003C\u002Fsub>ZrSi\u003Csub>4\u003C\u002Fsub>O\u003Csub>11\u003C\u002Fsub>",[16,17,18,19],"Na","Si","Zr","O",[16,17,18,19],[18],"14.10.5",[24],"APPROVED",1967,1961,"9","D","M","25","66","2","1","Monoclinic",5,10,"C2\u002Fc ","11.0390","10.0980","8.5677","0","100.313",4,1,939.6,"Twin plane {010}, uncommon.\r\n","crystals, to 15 cm",6,"770","2.92","2.97","3.07","Vitreous,Greasy,Pearly","highly vitreous to pearly on cleavage surfaces.","Translucent","Colorless, honey-brown",[58,59],"colorless","brown","Altered portions fluoresce brownish yellow under SW UV","{010}, good; {h0l}, poor.","Distinct\u002FGood","Irregular\u002FUneven,Conchoidal","Biaxial","-","1.607",3,"1.623","1.628","40","56",1.607,1.628,"r \u003C v","Mining Institute, St. Petersburg, 1037\u002F1; A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 83207, vis5052; National School of Mines, Paris, France.","Seems to be related to khurayyimite; the two are suggested to belong to the same group.\r\n\r\nThe two minerals can be described using geometrical repeat unit of cTr = 2T4 3T4 and topological repeat unit of cVr = 2V2 3V2.","Named in honor of Kuzma Alekseevich Vlasov (Кузьма Алексеевич Власов) (1 (14) November 1905, Nikolaevka, Tambov Province, Russian Empire - 29 September 1964, Moscow, USSR), mineralogist and geochemist, founder of the Institute of Mineralogy (Moscow).","2025-08-11 12:14:24",[],[],[82,89,96,104,111,118,126,134,140,148],{"id":83,"name":84,"entrytype":9,"csystem":34,"ima_formula":85,"mindat_formula":85,"hmin":48,"hmax":48,"dmeas":86,"dcalc":87,"primary_image_id":88},31,"Aegirine","NaFe\u003Csup>3+\u003C\u002Fsup>Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>6\u003C\u002Fsub>","3.5","3.576",257,{"id":90,"name":91,"entrytype":9,"csystem":92,"ima_formula":93,"mindat_formula":93,"hmin":94,"hmax":48,"dmeas":41,"dcalc":41,"primary_image_id":95},33,"Aenigmatite","Triclinic","Na\u003Csub>4\u003C\u002Fsub>[Fe\u003Csup>2+\u003C\u002Fsup>\u003Csub>10\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>]O\u003Csub>4\u003C\u002Fsub>[Si\u003Csub>12\u003C\u002Fsub>O\u003Csub>36\u003C\u002Fsub>]",5.5,266,{"id":97,"name":98,"entrytype":9,"csystem":92,"ima_formula":99,"mindat_formula":99,"hmin":48,"hmax":100,"dmeas":101,"dcalc":102,"primary_image_id":103},96,"Albite","Na(AlSi\u003Csub>3\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>)",6.5,"2.6","2.615",549,{"id":105,"name":106,"entrytype":9,"csystem":34,"ima_formula":107,"mindat_formula":107,"hmin":35,"hmax":48,"dmeas":108,"dcalc":109,"primary_image_id":110},325,"Arfvedsonite","NaNa\u003Csub>2\u003C\u002Fsub>(Fe\u003Csup>2+\u003C\u002Fsup>\u003Csub>4\u003C\u002Fsub>Fe\u003Csup>3+\u003C\u002Fsup>)Si\u003Csub>8\u003C\u002Fsub>O\u003Csub>22\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>","3.3","3.33",1795,{"id":112,"name":113,"entrytype":9,"csystem":114,"ima_formula":115,"mindat_formula":115,"hmin":35,"hmax":48,"dmeas":116,"dcalc":41,"primary_image_id":117},1420,"Eudialyte","Trigonal","Na\u003Csub>15\u003C\u002Fsub>Ca\u003Csub>6\u003C\u002Fsub>Fe\u003Csub>3\u003C\u002Fsub>Zr\u003Csub>3\u003C\u002Fsub>Si(Si\u003Csub>25\u003C\u002Fsub>O\u003Csub>73\u003C\u002Fsub>)(O,OH,H\u003Csub>2\u003C\u002Fsub>O)\u003Csub>3\u003C\u002Fsub>(Cl,OH)\u003Csub>2\u003C\u002Fsub>","2.74",8170,{"id":119,"name":120,"entrytype":9,"csystem":121,"ima_formula":122,"mindat_formula":122,"hmin":123,"hmax":123,"dmeas":124,"dcalc":41,"primary_image_id":125},1458,"Fayalite","Orthorhombic","Fe\u003Csup>2+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>(SiO\u003Csub>4\u003C\u002Fsub>)",7,"4.39",8360,{"id":127,"name":128,"entrytype":9,"csystem":129,"ima_formula":130,"mindat_formula":130,"hmin":43,"hmax":43,"dmeas":131,"dcalc":132,"primary_image_id":133},1576,"Fluorite","Isometric","CaF\u003Csub>2\u003C\u002Fsub>","3.175","3.181",29727,{"id":135,"name":136,"entrytype":9,"csystem":34,"ima_formula":137,"mindat_formula":138,"hmin":35,"hmax":35,"dmeas":41,"dcalc":41,"primary_image_id":139},7163,"Katophorite","Na(NaCa)(Mg\u003Csub>4\u003C\u002Fsub>Al)(Si\u003Csub>7\u003C\u002Fsub>Al)O\u003Csub>22\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>","Na(CaNa){Mg\u003Csub>4\u003C\u002Fsub>Al)(AlSi\u003Csub>7\u003C\u002Fsub>O\u003Csub>22\u003C\u002Fsub>)(OH)\u003Csub>2\u003C\u002Fsub>",8737,{"id":141,"name":142,"entrytype":9,"csystem":121,"ima_formula":143,"mindat_formula":144,"hmin":48,"hmax":48,"dmeas":145,"dcalc":146,"primary_image_id":147},2436,"Lorenzenite","Na\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>O\u003Csub>3\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>6\u003C\u002Fsub>)","Na\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>6\u003C\u002Fsub>)O\u003Csub>3\u003C\u002Fsub>","3.42","3.44",14741,{"id":149,"name":150,"entrytype":9,"csystem":92,"ima_formula":151,"mindat_formula":151,"hmin":48,"hmax":100,"dmeas":152,"dcalc":153,"primary_image_id":154},2704,"Microcline","K(AlSi\u003Csub>3\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>)","2.54","2.56",16209,[],[157],{"id":158,"txt":159,"latitude":160,"longitude":161,"country":162},18691,"Vavnbed Mountain, Lovozersky District, Murmansk Oblast, Russia",67.920838,35.009262,"Russia",11,[165,168,171,174,177,181,185,189,193,197,201,206,211],{"id":166,"year":11,"html":167,"doi":11},16127405,"Kristallografiya: 19: 252-259.",{"id":169,"year":11,"html":170,"doi":11},16127406,"Soviet Physics – Crystallography: 19: 152-156.",{"id":172,"year":26,"html":173,"doi":11},523613,"Fleischer, M. (1961) New Mineral Names. \u003Ci>American Mineralogist\u003C\u002Fi>,  46 (9-10 ). 1200-1204 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM46\u002FAM46_1200.pdf?reftype=.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":175,"year":26,"html":176,"doi":11},16127400,"Tikhonenkova, R.P., Kazakova, M.E. (1961) Vlasovite - a new zirconium silicate from the Lovozero Massif. Doklady Akademii Nauk SSSR: 137: 944-946.",{"id":178,"year":179,"html":180,"doi":11},16127401,1962,"Voronkov, A.A., Pyatenko, Y.A. (1962) The crystal structure of vlasovite. Soviet Physics - Crystallography: 6: 755-760.",{"id":182,"year":25,"html":183,"doi":184},6046,"IMA (1967) International Mineralogical Association: Commission on New Minerals and Mineral Names. \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>,  36 (277) 131-136 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1967.036.277.20'>doi:10.1180\u002Fminmag.1967.036.277.20\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_36\u002F36-277-131.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1967.036.277.20",{"id":186,"year":25,"html":187,"doi":188},6065,"Fleet, S. G., Cann, J. R. (1967) Vlasovite: a second occurrence and a triclinic to monoclinic inversion. \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>,  36 (278) 233-241 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1967.036.278.06'>doi:10.1180\u002Fminmag.1967.036.278.06\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_36\u002F36-278-233.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1967.036.278.06",{"id":190,"year":191,"html":192,"doi":11},17063047,1973,"Gittins, J., Gasparrini, E. L., Fleet, S. G. (1973) The occurrence of vlasovite in Canada. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  12 (3) 211-214 \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Frruff_1.0\u002Fuploads\u002FCM12_211.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":194,"year":195,"html":196,"doi":11},17063052,1985,"Currie, K. L., Zaleski, E. (1985) The relative stability of elpidite and vlasovite: a P-T indicator for peralkaline rocks. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  23 (4) 577-582 \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Frruff_1.0\u002Fuploads\u002FCM23_577.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":198,"year":199,"html":200,"doi":11},16968010,2001,"(2001) Vlasovite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fvlasovite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":202,"year":203,"html":204,"doi":205},612238,2003,"Gobechiya, E. R., Pekov, I. V., Pushcharovskii, D. Yu., Ferraris, G., Gula, A., Zubkova, N. V., Chukanov, N. V. (2003) New data on vlasovite: Refinement of the crystal structure and the radiation damage of the crystal during the x-ray diffraction experiment. \u003Ci>Crystallography Reports\u003C\u002Fi>,  48 (5) 750-754 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1134\u002F1.1612595'>doi:10.1134\u002F1.1612595\u003C\u002Fa>","10.1134\u002F1.1612595",{"id":207,"year":208,"html":209,"doi":210},64334,2006,"Sokolova, E., Hawthorne, F. C., Ball, N. A., Mitchell, R. H., Della Ventura, G. (2006) Vlasovite, Na\u003Csub>2\u003C\u002Fsub>Zr(Si\u003Csub>4\u003C\u002Fsub>O\u003Csub>11\u003C\u002Fsub>), from the Kipawa alkaline complex, Quebec, Canada: crystal-structure refinement and infrared spectroscopy. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  44 (6) 1349-1356 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2113\u002Fgscanmin.44.6.1349'>doi:10.2113\u002Fgscanmin.44.6.1349\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fcm\u002Fvol44\u002FCM44_1349.pdf' class='refpdflink'>\u003C\u002Fa>","10.2113\u002Fgscanmin.44.6.1349",{"id":212,"year":213,"html":214,"doi":215},16463064,2023,"Krüger, Biljana, Galuskina, Irina O., Galuskin, Evgeny V., Vapnik, Yevgeny, Murashko, Mikhail N. (2023) Khurayyimite Ca\u003Csub>7\u003C\u002Fsub>Zn\u003Csub>4\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(OH)\u003Csub>10\u003C\u002Fsub>·4H\u003Csub>2\u003C\u002Fsub>O: a mineral with unusual loop-branched sechser single chains. \u003Ci>Mineralogy and Petrology\u003C\u002Fi>,  117 (2) 191-200 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fs00710-022-00804-z'>doi:10.1007\u002Fs00710-022-00804-z\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Flink.springer.com\u002Fcontent\u002Fpdf\u002F10.1007\u002Fs00710-022-00804-z.pdf' class='refpdflink'>\u003C\u002Fa>","10.1007\u002Fs00710-022-00804-z",[217,227,233,242,250],{"id":218,"source_url":219,"license_code":220,"credit_html":221,"title":222,"description":223,"author":224,"original_width":225,"original_height":226},9957,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10140867","CC BY-SA 3.0","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10140867\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Vlasovite-Gittinsite-Eudialyte-122184.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FVlasovite\" class=\"extiw\" title=\"en:Vlasovite\">Vlasovite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGittinsite\" class=\"extiw\" title=\"en:Gittinsite\">Gittinsite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEudialyte\" class=\"extiw\" title=\"en:Eudialyte\">Eudialyte\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Kipawa alkaline complex, Les Lacs-du-Témiscamingue, Témiscamingue RCM, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAbitibi-T%C3%A9miscamingue\" class=\"extiw\" title=\"en:Abitibi-Témiscamingue\">Abitibi-Témiscamingue\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuebec\" class=\"extiw\" title=\"en:Quebec\">Québec\u003C\u002Fa>, Canada (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-614.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 4.0 x 3.8 x 2.0 cm.\u003C\u002Fdd>\n\u003Cdd>A spectacular and showy specimen of a transparent yellow-gray vlasovite crystal frozen in bright pink eudialyte matrix. A white rind of gittinsite surrounds the vlasovite. Vlasovite and gittinsite are ULTRA-RARE zirconium silicates, found only in a few alkaline massifs worldwide. The Kipawa Complex is the Type Locality for gittinsite. This is a superb example. Vlasovite fluoresces a moderate yellow under UV illumination. Ex. Marty Zinn Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",455,500,{"id":228,"source_url":229,"license_code":220,"credit_html":230,"title":231,"description":223,"author":224,"original_width":232,"original_height":226},9958,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10140868","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10140868\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Vlasovite-Gittinsite-Eudialyte-122185.jpg",471,{"id":234,"source_url":235,"license_code":236,"credit_html":237,"title":238,"description":11,"author":239,"original_width":240,"original_height":241},30951,"https:\u002F\u002Fwww.esbirky.cz\u002Fdetail\u002F194049","CC BY 4.0","Photo: #PredmetAutorFoto:194049 — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fwww.esbirky.cz\u002Fdetail\u002F194049\" rel=\"noopener\">National Museum - Natural History Museum\u003C\u002Fa> via Europeana","Boulangerit","#PredmetAutorFoto:194049",650,488,{"id":243,"source_url":244,"license_code":220,"credit_html":245,"title":246,"description":247,"author":224,"original_width":248,"original_height":249},9959,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160975","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160975\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Vlasovite-Gittinsite-Eudialyte-213097.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FVlasovite\" class=\"extiw\" title=\"en:Vlasovite\">Vlasovite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGittinsite\" class=\"extiw\" title=\"en:Gittinsite\">Gittinsite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FEudialyte\" class=\"extiw\" title=\"en:Eudialyte\">Eudialyte\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Kipawa alkaline complex, Les Lacs-du-Témiscamingue, Témiscamingue RCM, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAbitibi-T%C3%A9miscamingue\" class=\"extiw\" title=\"en:Abitibi-Témiscamingue\">Abitibi-Témiscamingue\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FQuebec\" class=\"extiw\" title=\"en:Quebec\">Québec\u003C\u002Fa>, Canada (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-614.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 7.5 x 3.9 x 3.3 cm.\u003C\u002Fdd>\n\u003Cdd>A spectacular and showy, two-sided specimen of a glassy, translucent, golden-amber vlasovite crystal frozen in glassy, cherry-red eudialyte matrix. A white rind of gittinsite surrounds the vlasovite. Vlasovite and gittinsite are very rare zirconium silicates, found only in a few alkaline massifs worldwide. There is even a 1.2 cm gem section of eudialyte on this piece. The Kipawa Complex is the Type Locality for gittinsite. This is a superb example. Vlasovite fluoresces a moderate yellow under UV illumination.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",700,399,{"id":251,"source_url":252,"license_code":220,"credit_html":253,"title":254,"description":247,"author":224,"original_width":255,"original_height":256},9960,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160976","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160976\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Vlasovite-Gittinsite-Eudialyte-213098.jpg",600,521,[258,264,269],{"id":259,"url":260,"label":261,"formula":262,"spacegroup":263,"year":208},14271,"\u002Fcif\u002F14271.cif","Sokolova 2006","Na2 Zr Si4 O11","C 1 2\u002Fc 1",{"id":265,"url":266,"label":267,"formula":262,"spacegroup":263,"year":268},14272,"\u002Fcif\u002F14272.cif","Voronkov 1974",1974,{"id":270,"url":271,"label":272,"formula":262,"spacegroup":263,"year":25},14273,"\u002Fcif\u002F14273.cif","Fleet 1967",[274],"Vlasoviet",[276,280,284,288,291,294],{"lang":277,"names":278},"ca",[279],"vlasovita",{"lang":281,"names":282},"de",[283],"Vlasovit",{"lang":285,"names":286},"es",[287],"Vlasovita",{"lang":289,"names":290},"eu",[287],{"lang":292,"names":293},"it",[7],{"lang":295,"names":296},"zh",[297],"硅锆钠石","Q4015892",{"history":11,"applications":11}]