[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:2632":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":21,"key_elements":22,"impurities":23,"cim":24,"ima_status":25,"ima_notes":11,"ima_history":11,"approval_year":11,"publication_year":11,"discovery_year":28,"strunz10ed1":29,"strunz10ed2":30,"strunz10ed3":31,"strunz10ed4":32,"dana8ed1":33,"dana8ed2":34,"dana8ed3":35,"dana8ed4":36,"csystem":37,"cclass":38,"spacegroup":39,"spacegroupset":40,"a":41,"b":42,"c":43,"alpha":44,"beta":44,"gamma":44,"aerror":11,"berror":11,"cerror":11,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":11,"z":45,"csmetamict":13,"commentcrystal":11,"twinning":11,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":11,"tlform":11,"hmin":46,"hmax":46,"hardtype":11,"vhnmin":44,"vhnmax":44,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":47,"dmeas2":48,"dcalc":49,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":11,"lustretype":50,"commentluster":11,"diapheny":51,"streak":52,"colour":53,"commentcolor":11,"colors":54,"streak_colors":60,"luminescence":11,"uv":61,"cleavage":62,"cleavagetype":63,"fracturetype":11,"tenacity":64,"commentbreak":11,"opticaltype":65,"opticalsign":66,"opticalalpha":67,"opticalalpha2":44,"opticalalphaerror":11,"opticalbeta":68,"opticalbeta2":44,"opticalbetaerror":11,"opticalgamma":69,"opticalgamma2":44,"opticalgammaerror":11,"opticalomega":44,"opticalomega2":44,"opticalomegaerror":11,"opticalepsilon":44,"opticalepsilon2":44,"opticalepsilonerror":11,"opticaln":44,"opticaln2":44,"opticalnerror":11,"optical2vcalc":44,"optical2vcalc2":44,"optical2vcalcerror":11,"optical2vmeasured":44,"optical2vmeasured2":44,"optical2vmeasurederror":11,"rimin":70,"rimax":71,"opticaldispersion":72,"opticalpleochroism":73,"opticalpleochorismdesc":74,"opticalbirefringence":75,"opticalcomments":11,"opticalcolour":11,"opticalinternal":11,"opticaltropic":11,"opticalanisotropism":11,"opticalbireflectance":11,"opticalextinction":76,"opticalr":11,"specdispm":11,"ir":11,"electrical":11,"magnetism":11,"thermalbehaviour":11,"other":11,"industrial":11,"occurrence":11,"otheroccurrence":11,"type_specimen_store":11,"description_short":77,"aboutname":78,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":79,"reviewed_at":11,"variety_of":11,"varieties":80,"group_members":81,"associates":82,"confused_with":91,"type_localities":92,"occurrence_total":99,"citations":100,"images":123,"structures":200,"synonyms":207,"language_names":212,"wikidata_qid":228,"texts":229},2632,"1:1:2632:7","d06bcfa9-8956-440e-834b-fbb8b7eddd6b","Melanotekite","Mtk",0,"mineral",null,625,false,"Pb\u003Csub>2\u003C\u002Fsub>Fe\u003Csup>3+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)O\u003Csub>2\u003C\u002Fsub>","Pb\u003Csub>2\u003C\u002Fsub>Fe\u003Csup>3+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>O\u003Csub>2\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)",[17,18,19,20],"Fe","Pb","Si","O",[17,18,19,20],[18],",Ti,Al,Mn,Mg,","14.13.9",[26,27],"APPROVED","GRANDFATHERED","1880","9","B","E","80","56","2","10","1","Orthorhombic",7,39,"C2 2 21","6.93","10.98","10.06","0",4,6.5,"5.73","6.28","6.30","Greasy,Metallic,Sub-Metallic","Translucent","Grayish-black","Black, dark gray, blackish green",[55,56,57,58,59],"black","gray","green","red","brown",[56,55],"Not fluorescent in UV","Two cleavages are known, but without reported miller indices.","Very Good","brittle","Biaxial","+","2.12","2.17","2.31",2.12,2.31,"r \u003C v","Visible","Dark green to red brown. Translucent in thin section.","0.05","Parallel","Kentrolite-Melanotekite Series.\r\n\r\nA synthetic aluminium analogue is known.","From the Greek μελανός for \"black\" and τήκεσθαι, \"to melt\", in allusion to its appearence. ","2025-08-11 12:14:22",[],[],[83],{"id":84,"name":85,"entrytype":9,"csystem":86,"ima_formula":87,"mindat_formula":87,"hmin":88,"hmax":88,"dmeas":89,"dcalc":49,"primary_image_id":90},93,"Alamosite","Monoclinic","PbSiO\u003Csub>3\u003C\u002Fsub>",4.5,"6.488",534,[],[93],{"id":94,"txt":95,"latitude":96,"longitude":97,"country":98},3167,"Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden",59.8553767,14.2648029,"Sweden",22,[101,105,109,114,118],{"id":102,"year":103,"html":104,"doi":11},524744,1967,"Glasser, F. P. (1967) New data on kentrolite and melanotekite: ternary phase relations in the system PbO-Fe2O3-SiO2. \u003Ci>American Mineralogist\u003C\u002Fi>,  52 (7-8) 1085-1093 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM52\u002FAM52_1085.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":106,"year":107,"html":108,"doi":11},529134,1991,"Moore, Paul Brian, Gupta, Pradip K. Sen, Shen, Jinchuan, Schlemper, Elmer O. (1991) The kentrolite-melanotekite series, 4Pb\u003Csub>2\u003C\u002Fsub>(Mn,Fe)\u003Csup>3+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>O\u003Csub>2\u003C\u002Fsub>[Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>]: Chemical crystallographic relations, lone-pair splitting, and cation relation to 8URe2. \u003Ci>American Mineralogist\u003C\u002Fi>,  76 (7-8) 1389-1399 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM76\u002FAM76_1389.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":110,"year":111,"html":112,"doi":113},2015,1994,"Holtstam, D., Langhof, J. (1994) Hancockite from Jakobsberg, Filipstad, Sweden: the second world occurrence. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  58 (390) 172-174 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1994.058.390.18'>doi:10.1180\u002Fminmag.1994.058.390.18\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_58\u002F58-390-172.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1994.058.390.18",{"id":115,"year":116,"html":117,"doi":11},16965923,2001,"(2001) Melanotekite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fmelanotekite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":119,"year":120,"html":121,"doi":122},395999,2008,"Dorsam, G.; Liebscher, A.; Wunder, B.; Franz, G. (2008) Crystal structures of synthetic melanotekite (Pb2Fe2Si2O9), kentrolite (Pb2Mn2Si2O9), and the aluminum analogue (Pb2Al2Si2O9). \u003Ci>American Mineralogist\u003C\u002Fi>,  93 (4). 573-583 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam.2008.2594'>doi:10.2138\u002Fam.2008.2594\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fam\u002Fvol93\u002FAM93_573.pdf?reftype=.pdf' class='refpdflink'>\u003C\u002Fa>","10.2138\u002Fam.2008.2594",[124,134,141,149,157,162,168,174,180,188,194],{"id":125,"source_url":126,"license_code":127,"credit_html":128,"title":129,"description":130,"author":131,"original_width":132,"original_height":133},15789,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160965","CC BY-SA 3.0","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160965\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Melanotekite-213087.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMelanotekite\" class=\"extiw\" title=\"en:Melanotekite\">Melanotekite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FL%C3%A5ngban\" class=\"extiw\" title=\"en:Långban\">Långban\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFilipstad\" class=\"extiw\" title=\"en:Filipstad\">Filipstad\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FV%C3%A4rmland\" class=\"extiw\" title=\"en:Värmland\">Värmland\u003C\u002Fa>, Sweden (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3167.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 5.4 x 4.7 x 2.4 cm.\u003C\u002Fdd>\n\u003Cdd>Melanotekite is a very rare lead, iron silicate and this nearly solid melanotekite specimen is from the Type Locality - the extremely complex manganese-iron deposit at Langban, Sweden. Scintillating, brassy melanotekite crystals richly cover all sides of the skarn matrix. Hefty at 115 grams. Accompanied by a faded Burminco label, which dates the piece to the 1950s to 1970s.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",699,700,{"id":135,"source_url":136,"license_code":127,"credit_html":137,"title":138,"description":130,"author":131,"original_width":139,"original_height":140},15790,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160966","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10160966\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Melanotekite-213088.jpg",600,520,{"id":142,"source_url":143,"license_code":144,"credit_html":145,"title":146,"description":11,"author":11,"original_width":147,"original_height":148},30176,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F113140","CC BY 4.0","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F113140\" rel=\"noopener\">Department of Geology, TalTech\u003C\u002Fa> via Europeana","Lead",1000,666,{"id":150,"source_url":151,"license_code":127,"credit_html":152,"title":153,"description":154,"author":131,"original_width":155,"original_height":156},535,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447521","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447521\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Alamosite-Leadhillite-Melanotekite-ea6e.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAlamosite\" class=\"extiw\" title=\"en:Alamosite\">Alamosite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FLeadhillite\" class=\"extiw\" title=\"en:Leadhillite\">Leadhillite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMelanotekite\" class=\"extiw\" title=\"en:Melanotekite\">Melanotekite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: \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-43981.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: miniature, 3.5 x 2.5 x 1.5 cm\n\u003Cdl>\u003Cdt>Alamosite, Melanotekite, Leadhillite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>A small piece but truly oustanding for the finely crystallized alamosite on matrix of finely crysatllized leadhillite, and for the richeness and near-record size of the melanotekite! The overall combination is a relative value in that you get three very rare minerals, in excellent crystals, altogether - and in a displayable specimen, no less!\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",400,336,{"id":90,"source_url":158,"license_code":127,"credit_html":159,"title":160,"description":154,"author":131,"original_width":161,"original_height":155},"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447520","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447520\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Alamosite-Leadhillite-Melanotekite-ea6d.jpg",298,{"id":163,"source_url":164,"license_code":127,"credit_html":165,"title":166,"description":154,"author":131,"original_width":167,"original_height":155},536,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447522","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447522\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Alamosite-Leadhillite-Melanotekite-ea6f.jpg",202,{"id":169,"source_url":170,"license_code":127,"credit_html":171,"title":172,"description":154,"author":131,"original_width":173,"original_height":155},15791,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447524","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447524\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Alamosite-Leadhillite-Melanotekite-ea6c.jpg",303,{"id":175,"source_url":176,"license_code":127,"credit_html":177,"title":178,"description":154,"author":131,"original_width":133,"original_height":179},537,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447526","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447526\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Alamosite-Leadhillite-Melanotekite-ea6a.jpg",601,{"id":181,"source_url":182,"license_code":127,"credit_html":183,"title":184,"description":185,"author":131,"original_width":186,"original_height":187},539,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10477382","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10477382\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Alamosite-Melanotekite-tuc1043a.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAlamosite\" class=\"extiw\" title=\"en:Alamosite\">Alamosite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FMelanotekite\" class=\"extiw\" title=\"en:Melanotekite\">Melanotekite\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: thumbnail, 1.9 x 1.9 x 1.5 cm\n\u003Cdl>\u003Cdt>Alamosite with Melanotekite\u003C\u002Fdt>\u003C\u002Fdl>\u003C\u002Fdd>\n\u003Cdd>Superb, translucent, lathelike crystals of alamosite make the bulk of this specimen, which is a major thumbnail example of the species and, aside from a few freak specimens, is of a pretty good quality as well. The black specks are melanotekite, though there may also be other minerals in association here which I am not identifying. Alamosite in good crystals is one of the more uncommon of Tsumeb rarities, and seldom seen for sale (at any price, but usually very high, when priced). From an old German collection, such pieces are rarely seen on the market today.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",1747,1800,{"id":189,"source_url":190,"license_code":127,"credit_html":191,"title":192,"description":185,"author":131,"original_width":147,"original_height":193},540,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10477384","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10477384\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Alamosite-Melanotekite-tuc1043b.jpg",906,{"id":195,"source_url":196,"license_code":127,"credit_html":197,"title":198,"description":154,"author":131,"original_width":133,"original_height":199},538,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447527","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10447527\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Alamosite-Leadhillite-Melanotekite-ea6b.jpg",465,[201],{"id":202,"url":203,"label":204,"formula":205,"spacegroup":206,"year":120},8631,"\u002Fcif\u002F8631.cif","Dorsam 2008","Pb2 Fe2 Si2 O9","P b c n",[208,209,210,211],"Melanotecit","Melanotecita","Melanotecite","Melanotekiet",[213,217,221,225],{"lang":214,"names":215},"ca",[216],"melanotequita",{"lang":218,"names":219},"de",[220],"Melanotekit",{"lang":222,"names":223},"eu",[224],"Melanotekita",{"lang":226,"names":227},"it",[7],"Q3854112",{"history":11,"applications":11}]