Mineral 1.0Test your knowledge of specific minerals

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MuscoviteKAl2(AlSi3O10)(OH)2

Class: Silicate
Subclass: Phyllosilicate
Hardness: 2.5 - 4
Density: 2.8 - 2.9
Streak: Colourless
Lustre: Vitreous
Habit: Micaceous
Colours: Colourless, to white or gray

  Crystal System: Monoclinic
Cleavage: Perfect basal
Fracture: Uneven
Magnetism: None
Reaction with HCl: None

Identification in hand sample:
Colour and habit are best indicators.

Industrial / ecomonic uses:
Used in the electronics industry in the manufacture of capacitors, transistors, insulators and certain window types. Also used as a filler in building materials.

  

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