[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:2175":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":15,"elements":16,"sigelements":24,"key_elements":25,"impurities":26,"cim":27,"ima_status":28,"ima_notes":30,"ima_history":32,"approval_year":11,"publication_year":33,"discovery_year":34,"strunz10ed1":35,"strunz10ed2":36,"strunz10ed3":21,"strunz10ed4":37,"dana8ed1":38,"dana8ed2":39,"dana8ed3":40,"dana8ed4":40,"csystem":41,"cclass":11,"spacegroup":11,"spacegroupset":42,"a":43,"b":44,"c":45,"alpha":42,"beta":46,"gamma":42,"aerror":47,"berror":47,"cerror":48,"alphaerror":11,"betaerror":47,"gammaerror":11,"va3":11,"z":49,"csmetamict":13,"commentcrystal":50,"twinning":11,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":11,"tlform":11,"hmin":11,"hmax":11,"hardtype":11,"vhnmin":42,"vhnmax":42,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":51,"dmeas2":51,"dcalc":52,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":11,"lustretype":11,"commentluster":11,"diapheny":53,"streak":54,"colour":55,"commentcolor":11,"colors":56,"streak_colors":59,"luminescence":11,"uv":11,"cleavage":60,"cleavagetype":61,"fracturetype":11,"tenacity":62,"commentbreak":11,"opticaltype":63,"opticalsign":64,"opticalalpha":42,"opticalalpha2":42,"opticalalphaerror":11,"opticalbeta":65,"opticalbeta2":42,"opticalbetaerror":11,"opticalgamma":42,"opticalgamma2":42,"opticalgammaerror":11,"opticalomega":42,"opticalomega2":42,"opticalomegaerror":11,"opticalepsilon":42,"opticalepsilon2":42,"opticalepsilonerror":11,"opticaln":42,"opticaln2":42,"opticalnerror":11,"optical2vcalc":42,"optical2vcalc2":42,"optical2vcalcerror":11,"optical2vmeasured":42,"optical2vmeasured2":42,"optical2vmeasurederror":11,"rimin":66,"rimax":66,"opticaldispersion":67,"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":68,"industrial":11,"occurrence":69,"otheroccurrence":11,"type_specimen_store":70,"description_short":11,"aboutname":71,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":72,"reviewed_at":11,"variety_of":11,"varieties":73,"group_members":74,"associates":75,"confused_with":84,"type_localities":85,"occurrence_total":92,"citations":93,"images":129,"structures":162,"synonyms":163,"language_names":165,"wikidata_qid":203,"texts":204},2175,"1:1:2175:9","b92f7dca-6863-400b-b1a1-d95a5b25aae0","Kegelite","Keg",0,"mineral",null,120,false,"Pb\u003Csub>8\u003C\u002Fsub>Al\u003Csub>4\u003C\u002Fsub>(Si\u003Csub>8\u003C\u002Fsub>O\u003Csub>20\u003C\u002Fsub>)(SO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(CO\u003Csub>3\u003C\u002Fsub>)\u003Csub>4\u003C\u002Fsub>(OH)\u003Csub>8\u003C\u002Fsub>","Pb\u003Csub>4\u003C\u002Fsub>Al\u003Csub>2\u003C\u002Fsub>Si\u003Csub>4\u003C\u002Fsub>O\u003Csub>10\u003C\u002Fsub>(SO\u003Csub>4\u003C\u002Fsub>)(CO\u003Csub>3\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(OH)\u003Csub>4\u003C\u002Fsub>",[17,18,19,20,21,22,23],"Al","Pb","Si","O","C","S","H",[17,18,19,20,21,22,23],[18],"Cu,H2O","17.10.27",[29],"APPROVED",[31],"REDEFINED","Approved by IMA (IMA 1974-042) as Pb\u003Csub>12\u003C\u002Fsub>(Zn,Fe)\u003Csub>2\u003C\u002Fsub>Al\u003Csub>4\u003C\u002Fsub>Si\u003Csub>11\u003C\u002Fsub>S\u003Csub>4\u003C\u002Fsub>O\u003Csub>54\u003C\u002Fsub>\r\n1990: Redefined by IMA as Pb\u003Csub>4\u003C\u002Fsub>Al\u003Csub>8\u003C\u002Fsub>Si\u003Csub>8\u003C\u002Fsub>(SO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(CO\u003Csub>3\u003C\u002Fsub>)\u003Csub>4\u003C\u002Fsub>(OH)\u003Csub>8\u003C\u002Fsub>O\u003Csub>20\u003C\u002Fsub>, monoclinic (Dunn et al. 1990)",1975,"1975","9","E","80","71","5","1","Monoclinic","0","21.04","15.55","8.986","91.0",1,6,3,"space group A2\u002Fm, A2, or Am","4.5","4.76","Transparent,Translucent","White","Colorless",[57,58],"colorless","white",[58],"{100}","Perfect","flexible","Biaxial","-","1.81",1.81,"r > v","Insoluble in HCl.","Oxidation zone hydrothermal deposit.","National Museum of Natural History, Washington, D.C., USA, number 147460 (neotype).","Named in 1975 by Olaf Medenbach and Karl Schmetzer in honor of Friedrich Wilhelm Kegel [1874 Hettstedt, eastern Harz, Mansfeld-Südharz, Sachsen-Anhalt, Germany - 8 August, 1948 Landschlacht, Münsterlingen, Kreuzlingen, Thurgau, Switzerland], Director of mining operations (1922-1938) at Tsumeb, Namibia.","2025-12-19 17:16:55",[],[],[76],{"id":77,"name":78,"entrytype":9,"csystem":41,"ima_formula":79,"mindat_formula":79,"hmin":80,"hmax":80,"dmeas":81,"dcalc":82,"primary_image_id":83},93,"Alamosite","PbSiO\u003Csub>3\u003C\u002Fsub>",4.5,"6.488","6.30",534,[],[86],{"id":87,"txt":88,"latitude":89,"longitude":90,"country":91},2428,"Tsumeb Mine (Ongopolo Mine), Tsumeb, Oshikoto Region, Namibia",-19.2270412,17.7276421,"Namibia",5,[94,97,101,104,108,112,117,121,125],{"id":95,"year":33,"html":96,"doi":11},16113715,"Medenbach, O., Schmetzer, K. (1975) Kegelite - ein neues Bleisilikat von Tsumeb. Naturwissenschaften: 62: 137. (in German with English abstract)",{"id":98,"year":99,"html":100,"doi":11},526615,1976,"Fleischer, Michael, Pabst, Adolf, Mandarino, Joseph A., Chao, George Y., Cabri, Louis, J. (1976) New Mineral Names. \u003Ci>American Mineralogist\u003C\u002Fi>,  61 (1-2) 174-186 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM61\u002FAM61_174.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":102,"year":99,"html":103,"doi":11},17054187,"Medenbach, O.; Schmetzer, K. (1976) Kegelit - ein neues Bleisilikat von Tsumeb [Kegelite - a new lead silicate from Tsumeb]. \u003Ci>Neues Jahrbuch für Mineralogie - Monatshefte\u003C\u002Fi>,  1976. 110-114",{"id":105,"year":106,"html":107,"doi":11},526808,1977,"Fleischer, M., Mandarino, A. (1977) New mineral names. \u003Ci>American Mineralogist\u003C\u002Fi>,  62 (1-2). 173-176 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM62\u002FAM62_173.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":109,"year":110,"html":111,"doi":11},528887,1990,"Dunn, Pete J., Braithwaite, Richard S. W., Roberts, Andrew C., Ramik, Robert A. (1990) Kegelite from Tsumeb, Namibia: A redefinition. \u003Ci>American Mineralogist\u003C\u002Fi>,  75 (5-6) 702-704 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM75\u002FAM75_702.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":113,"year":114,"html":115,"doi":116},1699,1991,"Braithwaite, R. S. W. (1991) Kegelite: infrared spectroscopy and a structural hypothesis. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  55 (378) 127-134 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1991.055.378.11'>doi:10.1180\u002Fminmag.1991.055.378.11\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_55\u002F55-378-127.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1991.055.378.11",{"id":118,"year":119,"html":120,"doi":11},16603620,1993,"Raade, Gunnar (1993) Caledonite and Kegelite from Minge, Tune, Østfold. \u003Ci>Mineralogisk-Geologisk Museum - Universitetet i Oslo - Interne notater\u003C\u002Fi>, Geologisk Museums venner. 164-165",{"id":122,"year":123,"html":124,"doi":11},16965247,2001,"(2001) Kegelite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fkegelite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":126,"year":127,"html":128,"doi":11},16860535,2005,"Neall, T.; Green, D.I: (2005) Kegelite, a First British Occurrence, from Wanlockhead, Dumfries and Galloway, Scotland. \u003Ci>Journal of the Russell Society\u003C\u002Fi>,  8 (2). 110-111 \u003Ca target='_blank' href='https:\u002F\u002Fwww.mindat.org\u002Fgetjrs.php?i=08-2?pdf' class='refpdflink'>\u003C\u002Fa>",[130,140,147,155],{"id":131,"source_url":132,"license_code":133,"credit_html":134,"title":135,"description":136,"author":137,"original_width":138,"original_height":139},13082,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10151535","CC BY-SA 3.0","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10151535\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Kegelite-Siderite-177489.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKegelite\" class=\"extiw\" title=\"en:Kegelite\">Kegelite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSiderite\" class=\"extiw\" title=\"en:Siderite\">Siderite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Tsumeb Mine (Tsumcorp Mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTsumeb\" class=\"extiw\" title=\"en:Tsumeb\">Tsumeb\u003C\u002Fa>, Otjikoto (Oshikoto) Region, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-2428.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 2.7 x 2.7 x 2.2 cm.\u003C\u002Fdd>\n\u003Cdd>This is a fine thumbnail specimen of kegelite. The somewhat gemmy brown-red crystal in the middle is a remarkably sharp and lustrous siderite. It’s a nice accent to the rolling carpet of extremely rich, microcrystalline kegelite. Ex. Walter Kahn and Eric Asselborn Collections.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",800,765,{"id":141,"source_url":142,"license_code":133,"credit_html":143,"title":144,"description":136,"author":137,"original_width":145,"original_height":146},13083,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10151536","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10151536\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Kegelite-Siderite-177490.jpg",400,295,{"id":148,"source_url":149,"license_code":133,"credit_html":150,"title":151,"description":152,"author":137,"original_width":153,"original_height":154},13084,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160223","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160223\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Kegelite-Siderite-208647.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FKegelite\" class=\"extiw\" title=\"en:Kegelite\">Kegelite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSiderite\" class=\"extiw\" title=\"en:Siderite\">Siderite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Tsumeb Mine (Tsumcorp Mine), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTsumeb\" class=\"extiw\" title=\"en:Tsumeb\">Tsumeb\u003C\u002Fa>, Otjikoto (Oshikoto) Region, Namibia (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-2428.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 1.7 x 1.4 x 1.3 cm.\u003C\u002Fdd>\n\u003Cdd>Although this may not look like much to most collectors, others will recognize it as an extraordinarily rich specimen of the extremely rare species Kegelite, a lead species found in macrocrystals only at Tsumeb (the type locality). This piece has a rich covering of crystals with characteristic pearlescent sheen to them. The little clusters reach 1mm, which is exceptional in size and richness for the species. A sharp, lustrous, gemmy siderite crystal is in attendance for contrast. Only few valid kegelite specimens ever were recovered, and most available pieces are trims from those original pieces (this being no exception, a trim that previous owner Eric Asselborn said he obtained in trade in the 1980s, and from one of the specimens in BMNH holdings). Analysis by Bart Cannon confirmed the ID. Another trim from this same specimen was also in the Asselborn collection, and is now in the Smithsonian Institution. Ex. Eric Asselborn Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",571,508,{"id":156,"source_url":157,"license_code":133,"credit_html":158,"title":159,"description":152,"author":137,"original_width":160,"original_height":161},13085,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160224","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160224\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Kegelite-Siderite-208648.jpg",475,600,[],[164],"Kegeliet",[166,170,175,179,182,186,189,193,196,199],{"lang":167,"names":168},"ca",[169],"kegelita",{"lang":171,"names":172},"de",[173,174],"IMA 1974-042","Kegelit",{"lang":176,"names":177},"es",[178],"Kegelita",{"lang":180,"names":181},"eu",[178],{"lang":183,"names":184},"fr",[185],"kegelite",{"lang":187,"names":188},"it",[185],{"lang":190,"names":191},"nb",[192],"kegelitt",{"lang":194,"names":195},"nl",[185],{"lang":197,"names":198},"nn",[192],{"lang":200,"names":201},"ta",[202],"கெகெலைட்டு","Q3814266",{"history":11,"applications":11}]