The Mica Group

The density of this mineral is 2760-3200 kg/m3

This group is K, Al, and Mg aluminum silicates, with intermediate densities. Micas are common in igneous rocks and compose roughly 4% of Earth's crustal minerals. Biotite mica, known by a shorthand name of Biotite is the [potassium magnesium-iron] aluminum silicate, while muscovite mica, known by its shorthand name of muscovite, is the [potasssium aluminum] aluminum silicate.

Mica is a sheet silicate with properties of talc (of which talcum powder is made - slippery and flat crystals) or of your tabletop formica.


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Click on image for full size version (40K GIF)
Image from: NOAA

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The Mica Group

The density of this mineral is 2760-3200 kg/m3

This group is K, Al, and Mg aluminum silicates, with intermediate densities. Micas are common in igneous rocks and compose roughly 4% of Earth's crustal minerals. Biotite mica, known by a shorthand name of Biotite is the [potassium magnesium-iron] aluminum silicate, while muscovite mica, known by its shorthand name of muscovite, is the [potasssium aluminum] aluminum silicate.

Mica is a sheet silicate with properties of talc (of which talcum powder is made - slippery and flat crystals) or of your tabletop formica.


This is a view of the Earth.
Click on image for full size version (40K GIF)
Image from: NOAA

Go to a listing of Rocks by mineral group


The major types of minerals

Not applicable at this reading level.


This is a view of the Earth.
Click on image for full size version (40K GIF)
Image from: NOAA

Go to a listing of Rocks by mineral group



Last modified November 15, 1997 by the Windows Team

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