[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:27221":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":11,"ima_status":22,"ima_notes":11,"ima_history":11,"approval_year":24,"publication_year":25,"discovery_year":11,"strunz10ed1":26,"strunz10ed2":27,"strunz10ed3":28,"strunz10ed4":29,"dana8ed1":30,"dana8ed2":30,"dana8ed3":30,"dana8ed4":30,"csystem":31,"cclass":11,"spacegroup":11,"spacegroupset":30,"a":32,"b":33,"c":34,"alpha":30,"beta":30,"gamma":30,"aerror":11,"berror":11,"cerror":11,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":35,"z":36,"csmetamict":13,"commentcrystal":37,"twinning":11,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":38,"tlform":39,"hmin":11,"hmax":11,"hardtype":11,"vhnmin":30,"vhnmax":30,"vhnerror":11,"vhng":11,"vhns":11,"commenthard":40,"dmeas":30,"dmeas2":30,"dcalc":41,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":11,"lustretype":42,"commentluster":11,"diapheny":43,"streak":44,"colour":45,"commentcolor":11,"colors":46,"streak_colors":49,"luminescence":11,"uv":11,"cleavage":11,"cleavagetype":50,"fracturetype":51,"tenacity":52,"commentbreak":11,"opticaltype":53,"opticalsign":54,"opticalalpha":30,"opticalalpha2":30,"opticalalphaerror":11,"opticalbeta":30,"opticalbeta2":30,"opticalbetaerror":11,"opticalgamma":30,"opticalgamma2":30,"opticalgammaerror":11,"opticalomega":30,"opticalomega2":30,"opticalomegaerror":11,"opticalepsilon":30,"opticalepsilon2":30,"opticalepsilonerror":11,"opticaln":30,"opticaln2":30,"opticalnerror":11,"optical2vcalc":30,"optical2vcalc2":30,"optical2vcalcerror":11,"optical2vmeasured":30,"optical2vmeasured2":30,"optical2vmeasurederror":11,"rimin":11,"rimax":11,"opticaldispersion":11,"opticalpleochroism":55,"opticalpleochorismdesc":11,"opticalbirefringence":56,"opticalcomments":11,"opticalcolour":11,"opticalinternal":11,"opticaltropic":57,"opticalanisotropism":58,"opticalbireflectance":11,"opticalextinction":11,"opticalr":11,"specdispm":11,"ir":11,"electrical":11,"magnetism":11,"thermalbehaviour":11,"other":11,"industrial":11,"occurrence":59,"otheroccurrence":11,"type_specimen_store":60,"description_short":11,"aboutname":61,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":62,"reviewed_at":11,"variety_of":11,"varieties":63,"group_members":64,"associates":65,"confused_with":66,"type_localities":67,"occurrence_total":12,"citations":74,"images":83,"structures":84,"synonyms":85,"language_names":88,"wikidata_qid":108,"texts":109},27221,"1:1:27221:4","eb5c4684-6d88-480f-ba01-c527d0bd4e00","Eyselite","Eys",0,"mineral",null,1,false,"Fe\u003Csup>3+\u003C\u002Fsup>Ge\u003Csup>4+\u003C\u002Fsup>\u003Csub>3\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>(OH)",[16,17,18,19],"Fe","Ge","O","H",[16,17,18,19],[17],[23],"APPROVED",2003,2004,"4","D","M","20","0","Orthorhombic","8.302","9.718","4.527",365.2,2," Point Group: n.d.; Space Group: n.d. (P lattice) a","The type material shows the following forms: {100} major, very thin {010}, rounded {011}, and very thin rounded {001} minor. Crystals show growth steps on {100} and are partly hollow.","Individual subhedral to (rare) euhedral crystals are platy to very thin prismatic, elongate [001], with a length-to-width ratio of approximately 3:1 and not exceeding 20 µm in maximum length. Typical crystals are 20 × 14 × 1 µm in size.","Soft","3.639","Vitreous","Transparent,Translucent,Opaque","Brownish-yellow","Dirty brown-yellow (aggregates) to yellow-tan (crystals)",[47,48],"brown","yellow",[47,48],"None Observed","Irregular\u002FUneven","brittle","Biaxial","+","Non-pleochroic","low","Anisotropic","moderate","Very fine-grained aggregates in vugs of massive renierite – germanite – tennantite ore","Systematic Reference Series, National Mineral Collection, Geological Survey of Canada, Ottawa, Ontario, Canada, 68093.","Named in honor of Walter Hans Eysel (1935, Langenselbold, Hesse, Germany – 23 October 1999, Heidelberg, Germany), Professor of Crystallography, Ruprecht-Karls-Universität, Heidelberg, Germany, for his contributions to the study of germanates and for his numerous contributions to the Powder Diffraction File.","2025-08-11 12:14:51",[],[],[],[],[68],{"id":69,"txt":70,"latitude":71,"longitude":72,"country":73},2428,"Tsumeb Mine (Ongopolo Mine), Tsumeb, Oshikoto Region, Namibia",-19.2270412,17.7276421,"Namibia",[75,79],{"id":76,"year":25,"html":77,"doi":78},64043,"Roberts, A. C., Seward, T. M., Reusser, E., Carpenter, G. J.C., Grice, J. D., Clark, S. M., Marcus, M. A. (2004) Eyselite, Fe\u003Csup>3+\u003C\u002Fsup>Ge\u003Csup>4+\u003C\u002Fsup>\u003Csub>3\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>(OH), a new mineral species from Tsumeb, Namibia. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  42 (6) 1771-1776 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2113\u002Fgscanmin.42.6.1771'>doi:10.2113\u002Fgscanmin.42.6.1771\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fcm\u002Fvol42\u002FCM42_1771.pdf' class='refpdflink'>\u003C\u002Fa>","10.2113\u002Fgscanmin.42.6.1771",{"id":80,"year":81,"html":82,"doi":11},16964188,2014,"(2014) Eyselite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002FEyselite.pdf' class='refpdflink'>\u003C\u002Fa>",[],[],[86,87],"Eyseliet","IMA2003-052",[89,93,97,101,105],{"lang":90,"names":91},"ca",[92],"eyselita",{"lang":94,"names":95},"cs",[96],"Eyselit",{"lang":98,"names":99},"de",[96,100],"IMA 2003-052",{"lang":102,"names":103},"eu",[104],"Eyselita",{"lang":106,"names":107},"it",[7],"Q3736303",{"history":11,"applications":11}]