Sanidine is the high temperature form of potassium feldspar with a general formula K(AlSi3O8). Sanidine is found most typically in felsic volcanic rocks...

fine-grained groundmass. The mineral assemblage is predominantly quartz, sanidine, and plagioclase. It is the extrusive equivalent of granite. Its high silica...

by barium. The first of these include: orthoclase (monoclinic) KAlSi3O8 sanidine (monoclinic) (K,Na)AlSi3O8 microcline (triclinic) KAlSi3O8 anorthoclase...

called perthite. The higher-temperature polymorph of KAlSi3O8 is sanidine. Sanidine is common in rapidly cooled volcanic rocks such as obsidian and felsic...

sanidine (anorthoclase) and is often cryptoperthitic, with alternating microscopic bands of sodium feldspar (albite) and potassium feldspar (sanidine)...

potassium- and titanium-rich richterite; low aluminium diopside; and iron-rich sanidine. A variety of rare trace minerals occur. The rocks are high in potassium...

Rainbow (var.) Orthoclase Unakite Plagioclase Albite Labradorite Oligoclase Sanidine Sunstone Oregon sunstone Rainbow lattice sunstone Fergusonite Ferroaxinite...

eruptions, two common methods of radiometric dating are employed: 40Ar/39Ar on sanidine and U–Pb on zircon. The interpretation of the two techniques differs in...

albite – sanidine alkali feldspar solid solution series. Intermediate members of this series, high albite, anorthoclase and high sodium sanidine are stable...

chemically the same as orthoclase, but with a different crystalline structure Sanidine, the high-temperature form of potassium feldspar (K,Na)(Si,Al)4O8 Adularia...