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Carlosruizite : ウィキペディア英語版 | Carlosruizite
Carlosruizite is a sulfate or selenate – iodate mineral with chemical formula: K6(Na,K)4Na6Mg10(SeO4)12(IO3)12·12H2O. It has a low density (specific gravity of 3.36), colorless to pale yellow, transparent mineral which crystallizes in the trigonal crystal system.〔(Webmineral.com )〕 It forms a series with fuenzalidaite. It was first discovered in 1994 in the locality of Zapiga, Tarapacá Region of Chile. Its name came from Carlos Ruiz Fuller (1916–1997), founder of the Institute of Geological Investigations.〔(Mindat.org )〕 It is found in samples of iquiqueite leached from caliche amarillo (yellow nitrate ore).〔 ==Composition== Carlosruizite and fuenzalidate are members of a solid solution series K6(Na,K)4Na6Mg10(XO4)12(IO3)12·12H2O, for which the end-members have X = Se for the former and X = S for the latter. With the exception of selenium, the components of these minerals are widespread constituents of the Chilean nitrate ores. Se was not known to occur in these ores until it was discovered as a major component in carlosruizite by X-ray spectroscopy in the scanning electron microscope (SEM). Subsequent analyses of several specimens of nitrate ore from scattered localities in the Chilean nitrate fields showed them all to contain Se in amounts ranging from a few parts per million to nearly 50 ppm.〔Konnert J.A., Evans H.T., McGee J.J., and Ericksen G.E. (1994) Mineralogical studies of the nitrate deposits of Chile: VII. Two new saline minerals with the composition K6(Na,K)4Na 6Mg10(XO4)12(IO3)12·12H2O: Fuenzalidaite (X = S) and carlosruizite (X = Se). American Mineralogist, 79, 1003-1008.〕
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「Carlosruizite」の詳細全文を読む
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