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Journal of Mineralogical and Petrological Sciences

Japan Association of Mineralogical Sciences

Prosopite is an alumino–fluoride of calcium mineral. The chemical compositions of prosopite samples obtained from Zacatecas (Mexico), Ivigtut (Greenland), and Katugin deposit (Eastern Siberia, Russia) were determined using scanning electron microscopy and energy–dispersive X–ray spectroscopy. The fluorine content (in apfu) was between 4 and 5, and those less than 4 were not observed. The empirical formula derived as a mean of chemical compositions of multiple grains from Ivigtut is (Ca0.96Sr0.04...



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