Discussion on the Methods for Calculating the Crystal Chemical Formula of Phengite by the Date from Electron Probe
XIAO Ping\+1, LIU Jun\+2 (1.Faculty of Earth Sciences, China University of Geosciences, Wuhan, Hubei 430074, China; 2. Wulian County Bureau of Geology and Mineral Resourses, Wulian , Shandong, 262300, China)
According to the characteristics of the crystal chemical model of phengite, some calculation methods of the crystal chemical formula of phengite are compared with each other, and stoichiometry method is put forward which properly fit the crystal chemical model of phengite. The problem of Fe3+/Fe2+ in electron probe data is also solved.