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Dominant species
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Muscovite
Chemical
Formula
KAl2(AlSi3O10)(F,OH)2
Species
Silicates
Crystal
System
Monoclinic
Mohs
Scale
2
Specific
Gravity
2.76-3
Color
White, grey, silvery
Streak
White
Luster
Vitreous, Silky, Pearly
Refractive
Index
n = 1.552 - 1.576 n = 1.582 - 1.615 n = 1.587 - 1.618
Diaphaneity
Transparent, Translucent
Cleavage
PerfectPerfect on .
Fracture
Micaceous
Crystal Habit:massive to platy
Geological Setting:Muscovite is common in many different rock types as a primary mineral.
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