Home Mica (bright mica, muscovite)

Crystal lattice of muscovite
Fig. 1. Crystal lattice of muscovite
Formula KAl2[(OH,F)2|AlSi3O10]
Density  3.98 g/cm3
Hardness 2-3
CAS-No. 1318-94-1

Mica is a group of minerals, which belongs to the sheet minerals (phyllosilicates). They form thin, flexible platelets. For refractory purposes the bright mica (muscovite) is used, which is characterised by its high content of potassium (cf. chemical data). Mica indicates a relatively low melting point, so that it can not be used alone, but only in combination with other refractory fillers such as talc or pyrophyllite.

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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