Members of this group of framework minerals include the two-phase intermixture perthite and microcline. Like halite and the pyroxenes, they exhibit two cleavages separated by about 90 degrees. One of the two major subgroups of these aluminosilicate m
Members of this group of framework minerals include the two-phase intermixture perthite and microcline. Like halite and the pyroxenes, they exhibit two cleavages separated by about 90 degrees. One of the two major subgroups of these aluminosilicate minerals forms a continuous solid solution series with endmembers anorthite and albite, corresponding to calcium and sodium cations, respectively. Granite commonly contains large quantities of these minerals, which have a Mohs hardness of 6. FTP, name this group of minerals which includes orthoclase and plagioclase.
Members of this group of framework minerals include the two-phase intermixture perthite and microcline.
feldspars