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steacyite
Steacyite is a complex silicate mineral containing thorium and uranium; formula Kvariable(Ca,Na)2(Th,U)Si8O20. It forms small brown or yellow green crystals, often cruciform twinned crystals. It is radioactive. It was discovered at Mont-Saint-Hilaire, Quebec in 1982 and is named after Harold Robert Steacy (1923–2012), mineralogist.〔http://www.minsocam.org/ammin/AM68/AM68_471.pdf〕 ==References== ;Notes ;Sources * (Handbook of Mineralogy ) * (mindat page for steacyite )
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「steacyite」の詳細全文を読む
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