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About mica
Phyllosilicate mineral of aluminium and potassium

http://en.wikipedia.org/wiki/Muscovite

Muscovite (also known as common mica, isinglass, or potash mica[4]) is a phyllosilicate mineral of aluminium and potassium with formula KAl2(AlSi3O10)(F,OH)2, or (KF)2(Al2O3)3(SiO2)6(H2O). It has a highly-perfect basal cleavage yielding remarkably-thin laminæ (sheets) which are often highly elastic. Sheets of muscovite 5 metres by 3 metres have been found in Nellore, India.[5]

Muscovite has a Mohs hardness of 2–2.25 parallel to the [001] face, 4 perpendicular to the [001] and a specific gravity of 2.76–3. It can be colorless or tinted through grays, browns, greens, yellows, or (rarely) violet or red, and can be transparent or translucent. The green, chromium-rich variety is called fuchsite.
Muscovite with beryl (var. morganite) from Paprok, Afghanistan (dimensions: 5.9 x 4.8 x 3.4 cm)

Muscovite is the most common mica, found in granites, pegmatites, gneisses, and schists, and as a contact metamorphic rock or as a secondary mineral resulting from the alteration of topaz, feldspar, kyanite, etc. In pegmatites, it is often found in immense sheets that are commercially valuable. Muscovite is in demand for the manufacture of fireproofing and insulating materials and to some extent as a lubricant.

The name of muscovite comes from Muscovy-glass, a name formerly used for the mineral because of its use in Russia for windows. It is anisotropic and has high birefringence. Its crystal system is monoclinic.




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    the Maryland Institute College of Art
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  • Phyllosilicate mineral of aluminium and potassium
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    http://www.patentstorm.us/patents/4025829.html
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    http://www.google.com/
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  • Biotite
    http://www.britannica.com/EBchecked/topic/66240/biotite
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  • Muscovite.
    http://www.mineralszone.com/minerals
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  • Mica-aluminum silicate minerals.
    http://www.answers.com/topic/mica
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  • Mica Shields
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  • Mica Histori & General Information.
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  • Muscovite.
    http://itc.gsw.edu/faculty/bcarter/physgeol/min/musc.htm
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  • Britannica about mica.
    Asian deposits, chemical etching, compressibility...
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  • Micanite.
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  • Mineral Muscovite.
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  • The Mica Group of minerals
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  • Mica - Explanation and use.
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  • Mica grouping (chemical composition)
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  • Molding micaceous laminate
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  • Mica insulation
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  • New electric insulating materials
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  • SOGM - SMOG
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  • Mica and ecology
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  • English version (page about mica)
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  • Chemical composition of mica
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  • Molding micanite, Federal Standard 6122-75
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  • Key trends in mica consumption. Application areas
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  • Mica types, grades and application areas
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  • Mica-bearing materials list
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