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Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 43776.","Named for the Irtysh River, a major river close to the type locality.  The Irtysh leads into the Ob River.  The pair, taken together, form the seventh longest river in the world.","2025-08-11 12:14:21",[],[71,79],{"id":72,"name":73,"entrytype":9,"csystem":37,"ima_formula":74,"mindat_formula":74,"hmin":75,"hmax":75,"dmeas":76,"dcalc":77,"primary_image_id":78},834,"Calciotantite","CaTa\u003Csub>4\u003C\u002Fsub>O\u003Csub>11\u003C\u002Fsub>",6.5,"7.46","6.735",4397,{"id":80,"name":81,"entrytype":9,"csystem":82,"ima_formula":16,"mindat_formula":16,"hmin":44,"hmax":44,"dmeas":38,"dcalc":38,"primary_image_id":11},2864,"Natrotantite","Trigonal",[],[],[86],{"id":87,"txt":88,"latitude":89,"longitude":90,"country":91},20534,"Ungursai Ta Deposit, Irtysh River, East Kazakhstan Region, Kazakhstan",49.5647222,83.0933333,"Kazakhstan",[93,96,100],{"id":94,"year":27,"html":95,"doi":11},15960916,"Voloshin, A.V., Pakhomovsky, Y.A., Bulgak, L.V., Perlina, G.A. (1985) Irtyshite - a new mineral from granitic pegmatites. Mineralogiceskij Zhurnal: 7: 83-87.",{"id":97,"year":98,"html":99,"doi":11},16108233,1986,"Hawthorne, F.C., Bladh, K.W., Burke, E.A.J., Ercit, S., Grew, E.S., Grice, J.D., Puziewicz, J., Roberts, A.C., Schedler, R.A., Shigley, J.E. (1986) New mineral names. American Mineralogist: 71: 1543-1548.",{"id":101,"year":102,"html":103,"doi":11},16965041,2005,"(2005) Irtyshite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Firtyshite.pdf' class='refpdflink'>\u003C\u002Fa>",[],[],[107,108],"IMA1984-025","Irtyshiet",[110,114,119,123],{"lang":111,"names":112},"ca",[113],"irtyshita",{"lang":115,"names":116},"de",[117,118],"IMA 1984-025","Irtyshit",{"lang":120,"names":121},"eu",[122],"Irtyshita",{"lang":124,"names":125},"it",[7],"Q3802147",{"history":11,"applications":11}]