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Flakes measure up to 200 µm in length.","3.80",4,"Vitreous","Transparent","White","Light yellow",[51,52],"yellow","white",[52],"{0001}","Perfect","very brittle","Uniaxial","-","1.787",1.787,"Fe-Mn ores filling paleokarst pockets in marble. The ore and marble later underwent Tertiary metamorphism under upper greenschist facies conditions.","Musée Cantonal de Géologie, Lausanne, Switzerland, holotype (MGL53593) and cotype (MGL58732).","Closely related to carlfrancisite and mcgovernite.","Named after the discovery locality, the Turtmann Valley, Wallis, Switzerland.","2025-08-11 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· 2H\u003Csub>2\u003C\u002Fsub>O","Mn\u003Csup>2+\u003C\u002Fsup>\u003Csub>9\u003C\u002Fsub>(As\u003Csup>5+\u003C\u002Fsup>O\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(As\u003Csup>3+\u003C\u002Fsup>O\u003Csub>3\u003C\u002Fsub>)(OH)\u003Csub>9\u003C\u002Fsub>·2H\u003Csub>2\u003C\u002Fsub>O",4.5,"3.57","3.56",23408,[],[],[120],{"id":121,"txt":122,"latitude":123,"longitude":124,"country":125},14685,"Pipji glacier, Pipjitälli, Turtmann Valley, Turtmann-Unterems, Leuk, Valais, Switzerland",46.1658333,7.7233333,"Switzerland",1,[128,132],{"id":129,"year":30,"html":130,"doi":131},394357,"Brugger, Joël, Armbruster, Thomas, Meisser, Nicolas, Hejny, Clivia, Grobety, Bernard (2001) Description and crystal structure of turtmannite, a new mineral with a 68 Å period related to mcgovernite. \u003Ci>American Mineralogist\u003C\u002Fi>,  86 (11) 1494-1505 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam-2001-11-1218'>doi:10.2138\u002Fam-2001-11-1218\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fam\u002Fvol86\u002FAM86_1494.pdf' class='refpdflink'>\u003C\u002Fa>","10.2138\u002Fam-2001-11-1218",{"id":133,"year":134,"html":135,"doi":11},16967849,2021,"(2021) Turtmannite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002FTurtmannite.pdf' class='refpdflink'>\u003C\u002Fa>",[],[138],{"id":139,"url":140,"label":141,"formula":142,"spacegroup":143,"year":30},13989,"\u002Fcif\u002F13989.cif","Brugger 2001","Mg26.64 Mn119 V14.28 As6.72 Si16.56 O291.6","R -3 c",[145,146],"IMA2000-007","Turtmanniet",[148,152,157,161],{"lang":149,"names":150},"ca",[151],"turtmannita",{"lang":153,"names":154},"de",[155,156],"IMA 2000-007","Turtmannit",{"lang":158,"names":159},"eu",[160],"Turtmannita",{"lang":162,"names":163},"it",[164],"turtmannite","Q4000717",{"history":11,"applications":11}]