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The rubber industry uses wet ground mica as inert filler and a mold release compound in the manufacture of molded rubber products such as tires. The platy texture acts as an anti-blocking, anti-sticking agent.
Muscovite (white mica) | |
ChemicalComposition | KAl2Si3O10(OH)2, Potassium aluminum silicate. |
Class | Silicate |
Crystallography | Monoclinic; prismatic |
Habit | Crystals usually tabular with pseudohexagonal outline; commonly lamellar massive and small flakes. In plumose (featherlike), stellate, or globular forms; scaly massive; also compact massive and cryptocrystalline. |
Physicalproperties | Cleavage {001} perfect; sometimes shows parting parallel to {010} and {110}.Cleavage laminae flexible and elastic. H. 2.5 on cleavage surface, 4 across cleavage. S.G. 2.77-2.88. Luster vitreous, pearly, or silky. Transparent and colorless in thin sheets. In thicker blocks translucent, with light shades of yellow, brown, green, red.Streak white. |
K052 Mica