[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:1679":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":23,"key_elements":24,"impurities":11,"cim":25,"ima_status":26,"ima_notes":11,"ima_history":11,"approval_year":11,"publication_year":28,"discovery_year":29,"strunz10ed1":30,"strunz10ed2":31,"strunz10ed3":32,"strunz10ed4":33,"dana8ed1":34,"dana8ed2":35,"dana8ed3":36,"dana8ed4":37,"csystem":38,"cclass":11,"spacegroup":11,"spacegroupset":39,"a":40,"b":41,"c":42,"alpha":43,"beta":44,"gamma":45,"aerror":46,"berror":47,"cerror":48,"alphaerror":11,"betaerror":49,"gammaerror":11,"va3":11,"z":50,"csmetamict":13,"commentcrystal":51,"twinning":11,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":11,"tlform":11,"hmin":11,"hmax":11,"hardtype":11,"vhnmin":39,"vhnmax":39,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":11,"dmeas":39,"dmeas2":39,"dcalc":52,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":11,"lustretype":53,"commentluster":11,"diapheny":54,"streak":55,"colour":56,"commentcolor":11,"colors":57,"streak_colors":61,"luminescence":11,"uv":62,"cleavage":11,"cleavagetype":63,"fracturetype":62,"tenacity":11,"commentbreak":11,"opticaltype":64,"opticalsign":11,"opticalalpha":65,"opticalalpha2":66,"opticalalphaerror":11,"opticalbeta":39,"opticalbeta2":39,"opticalbetaerror":11,"opticalgamma":67,"opticalgamma2":68,"opticalgammaerror":11,"opticalomega":39,"opticalomega2":39,"opticalomegaerror":11,"opticalepsilon":39,"opticalepsilon2":39,"opticalepsilonerror":11,"opticaln":39,"opticaln2":39,"opticalnerror":11,"optical2vcalc":39,"optical2vcalc2":39,"optical2vcalcerror":11,"optical2vmeasured":39,"optical2vmeasured2":39,"optical2vmeasurederror":11,"rimin":69,"rimax":70,"opticaldispersion":71,"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":72,"description_short":11,"aboutname":73,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":74,"reviewed_at":11,"variety_of":11,"varieties":75,"group_members":76,"associates":77,"confused_with":78,"type_localities":79,"occurrence_total":86,"citations":87,"images":99,"structures":120,"synonyms":121,"language_names":124,"wikidata_qid":145,"texts":146},1679,"1:1:1679:3","24cdb48f-fd1b-4a9a-a51f-8e1e91895cf5","Gerdtremmelite","Gtm",0,"mineral",null,119,false,"(Zn,Fe)(Al,Fe)\u003Csub>2\u003C\u002Fsub>(AsO\u003Csub>4\u003C\u002Fsub>)(OH)\u003Csub>5\u003C\u002Fsub>","ZnAl\u003Csub>2\u003C\u002Fsub>(AsO\u003Csub>4\u003C\u002Fsub>)(OH)\u003Csub>5\u003C\u002Fsub>",[17,18,19,20,21,22],"Al","As","Fe","Zn","O","H",[17,18,20,21,22],[18,20],"20.4.10",[27],"APPROVED",1985,"1985","8","B","E","40","41","3","7","1","Triclinic","0","5.169","13.038","4.931","98.78","100.80","78.73",5,9,4,6,2,"Point Group: \u003Cmi>_1 or 1.; Space Group: P_1 or P1.\u003C\u002Fmi>","3.66","Adamantine","Transparent","White","Yellowish brown to dark brown",[58,59,60],"brown","yellow","white",[60],"None observed","None Observed","Biaxial","1.73","1.74","1.83","1.84",1.73,1.84,"r > v","Mineralogical-Petrographical Institute, University of Heidelberg, Heidelberg, Germany; National Museum of Natural History, Washington, D.C., USA, 162488.","Named after Dr. Gerd Tremmel (1940-12-02-2020), of Overath-Steinbrück, Germany, collector and specialist for minerals from Tsumeb, who submitted the type material for identification.\r\n","2025-08-11 12:14:20",[],[],[],[],[80],{"id":81,"txt":82,"latitude":83,"longitude":84,"country":85},2428,"Tsumeb Mine (Ongopolo Mine), Tsumeb, Oshikoto Region, Namibia",-19.2270412,17.7276421,"Namibia",1,[88,91,95],{"id":89,"year":28,"html":90,"doi":11},17054192,"Schmetzer, K., Medenbach, O. (1985) Gerdtremmelite, (Zn,Fe)(Al,Fe)\u003Csub>2\u003C\u002Fsub>[(AsO\u003Csub>4\u003C\u002Fsub>)|(OH)\u003Csub>5\u003C\u002Fsub>], a new mineral from Tsumeb, Namibia. \u003Ci>Neues Jahrbuch für Mineralogie - Monatshefte\u003C\u002Fi>,  1985. 1-6",{"id":92,"year":93,"html":94,"doi":11},16107930,1986,"Hawthorne, F.C., Dunn, P.J., Grice, J.D., Puziewicz, J., Shigley, J.E. (1986) New mineral names. American Mineralogist: 71: 845-847.",{"id":96,"year":97,"html":98,"doi":11},16964550,2005,"(2005) Gerdtremmelite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fgerdtremmelite.pdf' class='refpdflink'>\u003C\u002Fa>",[100,110],{"id":101,"source_url":102,"license_code":103,"credit_html":104,"title":105,"description":106,"author":107,"original_width":108,"original_height":109},9814,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=67641702","CC BY-SA 4.0","David Hospital, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=67641702\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Gerdtremmelite.jpg","Extremely rare mineral from Tsumeb! The mineral, that is only known from this locality worldwide, was labeled as \"RRR: extremely rare: single occurrence with less than 10 specimens known\" and \"brown aggregates of minute crystals on the type specimen\" in G.Gebhard Tsumeb II book (1999) when the mine was already closed (1996), so new discoveries will not take place in the future. This sample was in Gebhard collection and it's part of the type specimen, as proved by the label enclosed. Second oxidation zone. It occurs in this specimen as at least 5 typical brown balls on matrix.","David Hospital",731,667,{"id":111,"source_url":112,"license_code":113,"credit_html":114,"title":115,"description":116,"author":117,"original_width":118,"original_height":119},9815,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=131091961","Public domain","Ernst A. Schnaitmann, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=131091961\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Gerdtremmelite-492222.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FGerdtremmelite\" class=\"extiw\" title=\"en:Gerdtremmelite\">Gerdtremmelite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Tsumeb Mine (Ongopolo Mine), Tsumeb, Oshikoto Region, Namibia\u003C\u002Fdd>\n\u003Cdd>Optical enlargement: 3000:1\u003C\u002Fdd>\n\u003Cdd>Description: SEM of the Gerdtremmelite Type Material. Photo: TÜV Rheinland. Collection: Gerd Tremmel\u003Cbr>Thanks to Gerd Tremmel for kindly allowing us the use of this image.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Ernst A. Schnaitmann",748,580,[],[122,123],"Gerdtremmeliet","IMA1983-049a",[125,129,134,138,142],{"lang":126,"names":127},"ca",[128],"gerdtremmelita",{"lang":130,"names":131},"de",[132,133],"Gerdtremmelit","IMA 1983-049a",{"lang":135,"names":136},"eu",[137],"Gerdtremmelita",{"lang":139,"names":140},"fr",[141],"gerdtremmélite",{"lang":143,"names":144},"it",[7],"Q3760991",{"history":11,"applications":11}]