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About mica
Mica Histori & General Information.

The name mica was probably created from the Latin word micare meaning to shine in reference to the shiny luster of the micas. Muscovite is very resistant to heat and electricity. As a result, it was commonly called "Muscovy." This mineral was commonly called Muscovy Glass after the Latin term vitrum Muscoviticum. In 1850, James Dwight Dana formally named this mineral muscovite based on the Latin term. The name phlogopite, named by F.A. Breithaupt in 1841, comes from the Greek word phologopos meaning fiery in reference to the reddish color seen on some specimens of this mica. Mica is a mineral name given to a group of minerals that are similar in their physical properties and chemical compositions. They are all silicate minerals, which means that chemically they all contain silica (SiO4). Mineralogists call micas sheet silicates because their molecules combine to form distinct layers. These layers can be seen in muscovite mica specimens because it can be split (mineralogists call this feature cleavage) into very thin, flexible, transparent layers. This physical property is so distinctive that all minerals that cleave in this fashion are said to have micaceous cleavage. There are 37 different mica minerals. In addition to the silicate tetrahedrons in all micas, purple micaceous cleavage. contains the elements potassium, lithium, and aluminum. Black biotite contains potassium, iron, and magnesium. The two micas used as a commodity are: brown mica or phlogopite which contains iron and magnesium; and the "reddish, green, or white (or clear) mica" or muscovite which contains potassium and aluminum.

Large sheets of muscovite form in igneous rocks. Very large sheets or crystals of muscovite form in a pegmatite. A pegmatite is an extremely slow-cooling igneous rock in which very large crystals can form. Phlogopite generally forms in metamorphic rocks, especially in metamorphosed limestone, although it occasionally forms in igneous rocks, too.
Mica crystals are six-sided. They are fairly light and relatively soft, at 2 to 4 on Mohs' hardness scale for the univalent micas. Sheets and flakes of mica are flexible. Mica is heat-resistant and does not conduct electricity.
Two distinct forms of mica are utilized as a commodity. Scrap and flake mica is mica that either occurs naturally or is ground into very small flakes and pieces. Sheet mica is large pieces of mica that can be cut into various shapes for use in electronics.

http://www.mineralco.net




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