It has a highly perfect basal cleavage yielding remarkably thin laminae (sheets) which are often highly e Trivalent chromium replaces one of the aluminium (Al) atoms in the general muscovite formula producing the apple green hue distinctive of … Persbergite: Muscovite pseudomorphous after nepheline. Muscovite (also known as common mica, isinglass, or potash mica) is a hydrated phyllosilicate mineral of aluminium and potassium with formula KAl2(AlSi3O10)(F,OH)2, or (KF)2(Al2O3)3(SiO2)6(H2O). Muscovite Chemical Composition. Substance name : MUSCOVITE Product code : SIM6594.9 Formula : K2O∙3Al2O3∙6SiO2∙2H2O Synonyms : POTASSIUM MICA Chemical family : INORGANIC SILICATE 1.2. Chromium rich variety of the mineral muscovite, belonging to the mica group of phyllosilicate minerals, with the following formula: K(Al,Cr) 2 (AlSi 3 O 10 )(OH) 2. Muscovite is a potassium-rich mica with the following generalized composition… KAl 2 (AlSi 3 O 10)(OH) 2. Phengite: Phengite is an aluminous true mica which contains a relatively high amount of tetrahedrally co-ordinated Si (>3.1 apfu). A green to colorless, Ba-bearing variety of muscovite intermediate in chemical composition between true mica and brittle mica. In this formula potassium is sometimes replaced by other ions with a single positive charge such as sodium, rubidium, or cesium. Relevant identified uses of the substance or mixture and uses advised against Use of the substance/mixture : Chemical intermediate For research and industrial use only 1.3.