What is the difference between sericite and Muscovite?
Sericite crystals are scaly, crystalline aggregates are massive, gray, purple, rose, white and so on, with silk luster. Sericite (Sericite) is a kind of natural fine grained muscovite, muscovite is a subspecies, is layered silicate structure consists of two layers of silicon oxygen tetrahedron with silicon oxygen compound layer to form a layer of aluminum eight surface body. Can cut cleavage completely, thin sheet, thickness of less than 1U (theoretically cut 0.001u), diameter to thickness ratio; compared with Muscovite: with natural characteristics of small size, easy processing and ultra-fine. Sericite crystal chemical formula is: K, 0.5-1 (Al, Fe, Mg) 2 (SiAl) 4, O 10 (OH) 2, nH 2 O, general chemical composition: SiO 2, 43.13~49.04%, Al 2, O 3, 27.93~37.44%, K 2, O+Na 2, O9~11%, H 2, O,, 4.13~6.12%.
In addition, the chemical composition, structure and structure of Sericite are similar to kaolin. They also have some characteristics of clay minerals. They are dispersed in water medium and organic solvent, with good suspension properties, fine white particles and sticky. Therefore, sericite has many characteristics of mica minerals and clay minerals.
Sericite belongs to monoclinic crystal, crystal flake, with silky luster (Muscovite is shiny glass), pure block gray, purple rose color, white, diameter thickness ratio is >80, the proportion of 2.6~2.7, hardness 2~3, elastic, flexible, abrasion resistance and good abrasion resistance; heat insulation refractory in acid solution, stable chemical properties. Test data: elastic modulus is 1505~2134MPa, heat resistance 500~600oC, thermal conductivity 0.419~0.670W. (m.K) -1, electrical insulation 200kv/mm, anti radioactive 5 * 1014 thermal neutron /cm2 to illuminance.
Bai Yunmu (Muscovite), also called ordinary mica, potassium mica or mica, is one of the mica minerals. Muscovite is a good electric insulator and heat insulator, and it can produce a large quantity, so it has important economic value. It is commonly found in metamorphic rocks but also in rocks such as granite. Muscovite is not just white, it can be lighter brown, green, red to colorless, with a glassy luster to a silky luster. A large, square, six square crystal or fine-grained aggregate. Muscovite, chemical composition: KAl2[Si3AlO10] (OH, F) 2, ideal component is eight body film, containing Al, can also be a small amount of Fe, 3+, Mg, Fe, 2+, and even Mn, Cr, V and other replacement. Muscovite has a high degree of complete cleavage and pale white color. The characteristics of sheet elasticity.
