[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:10397":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":11,"polytypeof":11,"groupid":12,"weighting":13,"nolocadd":14,"blacklisted":14,"mindat_formula":15,"mindat_formula_note":11,"ima_formula":16,"elements":17,"sigelements":27,"key_elements":28,"impurities":11,"cim":11,"ima_status":29,"ima_notes":11,"ima_history":11,"approval_year":31,"publication_year":11,"discovery_year":11,"strunz10ed1":32,"strunz10ed2":33,"strunz10ed3":34,"strunz10ed4":35,"dana8ed1":36,"dana8ed2":36,"dana8ed3":36,"dana8ed4":36,"csystem":37,"cclass":38,"spacegroup":39,"spacegroupset":40,"a":41,"b":42,"c":43,"alpha":36,"beta":44,"gamma":36,"aerror":11,"berror":11,"cerror":11,"alphaerror":11,"betaerror":11,"gammaerror":11,"va3":45,"z":46,"csmetamict":14,"commentcrystal":47,"twinning":11,"tranglide":11,"parting":48,"epitaxidescription":11,"morphology":49,"tlform":50,"hmin":51,"hmax":52,"hardtype":11,"vhnmin":53,"vhnmax":36,"vhnerror":11,"vhng":54,"vhns":11,"commenthard":11,"dmeas":55,"dmeas2":55,"dcalc":56,"dmeaserror":57,"dcalcerror":11,"commentdense":58,"lustre":59,"lustretype":60,"commentluster":11,"diapheny":61,"streak":62,"colour":63,"commentcolor":11,"colors":64,"streak_colors":67,"luminescence":11,"uv":48,"cleavage":68,"cleavagetype":69,"fracturetype":70,"tenacity":71,"commentbreak":11,"opticaltype":11,"opticalsign":11,"opticalalpha":36,"opticalalpha2":36,"opticalalphaerror":11,"opticalbeta":36,"opticalbeta2":36,"opticalbetaerror":11,"opticalgamma":36,"opticalgamma2":36,"opticalgammaerror":11,"opticalomega":36,"opticalomega2":36,"opticalomegaerror":11,"opticalepsilon":36,"opticalepsilon2":36,"opticalepsilonerror":11,"opticaln":36,"opticaln2":36,"opticalnerror":11,"optical2vcalc":36,"optical2vcalc2":36,"optical2vcalcerror":11,"optical2vmeasured":36,"optical2vmeasured2":36,"optical2vmeasurederror":11,"rimin":11,"rimax":11,"opticaldispersion":11,"opticalpleochroism":72,"opticalpleochorismdesc":11,"opticalbirefringence":11,"opticalcomments":73,"opticalcolour":74,"opticalinternal":75,"opticaltropic":76,"opticalanisotropism":11,"opticalbireflectance":11,"opticalextinction":11,"opticalr":11,"specdispm":11,"ir":77,"electrical":11,"magnetism":11,"thermalbehaviour":11,"other":11,"industrial":11,"occurrence":78,"otheroccurrence":11,"type_specimen_store":79,"description_short":80,"aboutname":81,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":82,"reviewed_at":11,"variety_of":11,"varieties":83,"group_members":84,"associates":120,"confused_with":121,"type_localities":122,"occurrence_total":46,"citations":129,"images":146,"structures":147,"synonyms":154,"language_names":157,"wikidata_qid":176,"texts":177},10397,"1:1:10397:8","06e65a98-df24-45cc-8b11-a722a2561385","Polyakovite-(Ce)","Pak-Ce",0,"mineral",null,51417,52,false,"(Ce,Ca)\u003Csub>4\u003C\u002Fsub>(Mg,Fe\u003Csup>2+\u003C\u002Fsup>)(Cr\u003Csup>3+\u003C\u002Fsup>,Fe\u003Csup>3+\u003C\u002Fsup>)\u003Csub>2\u003C\u002Fsub>(Ti,Nb)\u003Csub>2\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>","(Ce,Ca)\u003Csub>4\u003C\u002Fsub>MgCr\u003Csub>2\u003C\u002Fsub>(Ti,Nb)\u003Csub>2\u003C\u002Fsub>Si\u003Csub>4\u003C\u002Fsub>O\u003Csub>22\u003C\u002Fsub>",[18,19,20,21,22,23,24,25,26],"Ca","Ce","Cr","Fe","Mg","Nb","Si","Ti","O",[19,20,22,24,25,26],[19,20,25],[30],"APPROVED",1998,"9","B","E","70","0","Monoclinic",5,11,"C2\u002Fm ","13.398","5.6974","11.042","100.539",828.6,2,"annealed from metamict crystal","none","\u003Cmi>Euhedral crystals, elongate [010] showing the forms {100}, {001}, {201}, _201}, {110}, {111}, {_111}, {112}, {_112}, and {_302} (almost identical to chevkinite).\u003C\u002Fmi>","Equant anhedral grains, to 2.5 cm across, and as euhedral crystals, elongate [010] to 2 mm.",5.5,6,"874",200,"4.75","5.05",7,"cannot obtain a cell volume on polyakovite-(Ce) as it does not give a diffraction pattern","Adamantine","Vitreous","Translucent","Light brown.","Black",[65,66],"black","brown",[66],"None","None Observed","Conchoidal","brittle","Non-pleochroic","1.931 \u003C n \u003C 1.935","Gray.","brown internal reflections are rarely observed.","Isotropic","IR spectrum nearly identical to chevkinite group minerals.","It is of hydrothermal origin in a carbonatite vein","Museum of the Ilmen Natural Reserve at Miass\r\nFersman Mineralogical Museum, Moscow","The Cr analogue of perrierite-(Ce) and longshoushanite-(Ce).","Named in honor of Vladislav Olegovich Polyakov (Владислав Олегович Поляков) (5 August 1950, Kirsanov, Tambov region, USSR - 13 September 1993, Miass, Chelyabinsk, USSR), mineralogist with the Institute of Mineralogy of the Ural Branch of the Russian Academy of Sciences. He was an expert in the Urals and Ilmensky mountains.","2026-02-07 12:44:19",[],[85,92,99,105,113],{"id":86,"name":87,"entrytype":9,"csystem":37,"ima_formula":88,"mindat_formula":88,"hmin":38,"hmax":51,"dmeas":89,"dcalc":90,"primary_image_id":91},6867,"Chevkinite-(Ce)","Ce\u003Csub>4\u003C\u002Fsub>(Ti,Fe\u003Csup>2+\u003C\u002Fsup>,Fe\u003Csup>3+\u003C\u002Fsup>)\u003Csub>5\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>","4.53","4.99",5385,{"id":93,"name":94,"entrytype":9,"csystem":37,"ima_formula":95,"mindat_formula":96,"hmin":52,"hmax":52,"dmeas":97,"dcalc":98,"primary_image_id":11},42733,"Christofschäferite-(Ce)","(Ce,La,Ca)\u003Csub>4\u003C\u002Fsub>Mn(Ti,Fe)\u003Csub>3\u003C\u002Fsub>(Fe,Ti)(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>","Ce\u003Csub>3\u003C\u002Fsub>CaMnTiFe\u003Csup>3+\u003C\u002Fsup>Ti\u003Csub>2\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub> ","4.8","4.85",{"id":100,"name":101,"entrytype":9,"csystem":37,"ima_formula":102,"mindat_formula":103,"hmin":11,"hmax":11,"dmeas":11,"dcalc":104,"primary_image_id":11},51415,"Delhuyarite-(Ce)","Ce\u003Csub>4\u003C\u002Fsub>Mg(Fe\u003Csup>3+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>W)◻(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>O\u003Csub>6\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>","Ce\u003Csub>4\u003C\u002Fsub>Mg(Fe\u003Csup>3+\u003C\u002Fsup>,W)\u003Csub>3\u003C\u002Fsub>◻(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>O\u003Csub>6\u003C\u002Fsub>(OH)\u003Csub>2\u003C\u002Fsub>","5.20",{"id":106,"name":107,"entrytype":9,"csystem":37,"ima_formula":108,"mindat_formula":109,"hmin":52,"hmax":52,"dmeas":110,"dcalc":111,"primary_image_id":112},27437,"Dingdaohengite-(Ce)","(Ce,La)\u003Csub>4\u003C\u002Fsub>Fe\u003Csup>2+\u003C\u002Fsup>(Ti,Fe\u003Csup>2+\u003C\u002Fsup>,Mg,Fe\u003Csup>3+\u003C\u002Fsup>)\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>Si\u003Csub>4\u003C\u002Fsub>O\u003Csub>22\u003C\u002Fsub>","(Ce,La)\u003Csub>4\u003C\u002Fsub>Fe\u003Csup>2+\u003C\u002Fsup>(Ti,Fe\u003Csup>2+\u003C\u002Fsup>,Mg,Fe\u003Csup>3+\u003C\u002Fsup>)\u003Csub>2\u003C\u002Fsub>Ti\u003Csub>2\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>","4.83","4.88",7232,{"id":114,"name":115,"entrytype":9,"csystem":37,"ima_formula":116,"mindat_formula":117,"hmin":38,"hmax":51,"dmeas":118,"dcalc":119,"primary_image_id":11},27512,"Maoniupingite-(Ce)","(Ce,Ca)\u003Csub>4\u003C\u002Fsub>(Fe\u003Csup>3+\u003C\u002Fsup>,Ti,Fe\u003Csup>2+\u003C\u002Fsup>,◻)(Ti,Fe\u003Csup>3+\u003C\u002Fsup>,Fe\u003Csup>2+\u003C\u002Fsup>,Nb)\u003Csub>4\u003C\u002Fsub>Si\u003Csub>4\u003C\u002Fsub>O\u003Csub>22\u003C\u002Fsub>","(Ce,Ca)\u003Csub>4\u003C\u002Fsub>(Fe\u003Csup>3+\u003C\u002Fsup>,Ti,Fe\u003Csup>2+\u003C\u002Fsup>,◻)(Ti,Fe\u003Csup>3+\u003C\u002Fsup>,Fe\u003Csup>2+\u003C\u002Fsup>,Nb)\u003Csub>4\u003C\u002Fsub>(Si\u003Csub>2\u003C\u002Fsub>O\u003Csub>7\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>O\u003Csub>8\u003C\u002Fsub>","4.63","4.81",[],[],[123],{"id":124,"txt":125,"latitude":126,"longitude":127,"country":128},8247,"Pit No. 97, Miass, Chelyabinsk Oblast, Russia",55.0166667,60.1833333,"Russia",[130,135,139,143],{"id":131,"year":132,"html":133,"doi":134},63522,2001,"Popov, V. A., Pautov, L. A., Sokolova, E., Hawthorne, F. C., McCammon, C., Bazhenova, L. F. (2001) Polyakovite-(Ce), (REE,Ca)4(Mg,Fe2+)(Cr3+,Fe3+)2(Ti,Nb)2Si4O22, a new metamict mineral species from the Ilmen Mountains, southern Urals, Russia: mineral description and crystal chemistry. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  39 (4). 1095-1104 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2113\u002Fgscanmin.39.4.1095'>doi:10.2113\u002Fgscanmin.39.4.1095\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fcm\u002Fvol39\u002FCM39_1095.pdf' class='refpdflink'>\u003C\u002Fa>","10.2113\u002Fgscanmin.39.4.1095",{"id":136,"year":137,"html":138,"doi":11},16130737,2002,"Jambor, J.L., Roberts, A.C. (2002) New mineral names. American Mineralogist: 87: 765-768.",{"id":140,"year":141,"html":142,"doi":11},16130697,2021,"Popov, V.A. (2021): Parageneses of polyakovite-(Ce) in carbonatites and ultramafites of the Ilmen mountains (South Urals, Russia). Zapiski RMO: 150: 88-95.",{"id":144,"year":141,"html":145,"doi":11},16966776,"(2021) Polyakovite-(Ce). \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002FPolyakovite-Ce.pdf' class='refpdflink'>\u003C\u002Fa>",[],[148],{"id":149,"url":150,"label":151,"formula":152,"spacegroup":153,"year":132},11396,"\u002Fcif\u002F11396.cif","Popov 2001","(Ce1.84 La1.24 Nd.36 Pr.16 Y.04 Ca.24 Th.12) Mg.8 Fe.92 Ti1.52 Nb.32 Cr1.28 Si4 O22","C 1 2\u002Fm 1",[155,156],"IMA1998-029","Polyakoviet-(Ce)",[158,163,168,172],{"lang":159,"names":160},"ca",[161,162],"Poliakovita-","poliakovita-(Ce)",{"lang":164,"names":165},"de",[166,167],"IMA 1998-029","Polyakovit-(Ce)",{"lang":169,"names":170},"eu",[161,171],"Polyakovita-(Ce)",{"lang":173,"names":174},"it",[175,7],"Polyakovite-","Q3907727",{"history":11,"applications":11}]