Mica

Mica is a generic term applied to a group

of complex aluminosilicate minerals

having a sheet or plate like structure.

It forms in flat, six sided monoclinic crystals

that have perfect basal cleavage and large surfaces.

It is capable of easily splitting into thin, flat films.  

   Chemically, mica is a complex silicate of aluminum

and...

Mica is a generic term applied to a group

of complex aluminosilicate minerals

having a sheet or plate like structure.

It forms in flat, six sided monoclinic crystals

that have perfect basal cleavage and large surfaces.

It is capable of easily splitting into thin, flat films.  

   Chemically, mica is a complex silicate of aluminum

and alkalis with hydroxyl.  Some varieties may contain

impurities of iron, magnesium, lithium, fluorine,

barium, manganese and vanadium. 
 

    It is because of its perfect basal cleavage and its chemical and physical properties, that mica is a very valuable and desired mineral in many ways. No other substance found in nature possesses all the properties of mica.
 

Properties of Mica

    Mica possesses some of the most outstanding combinations of physical, electrical, thermal and mechanical properties which are not found in any other product.  The crystalline structure forms the layers that are so easily delaminated into sheets.  Mica is chemically inert, a non-conductor of electricity ( dielectric ), elastic, flexible, readily absorbs water ( hydrophilic ), insulating, lightweight, reflective, flat and broad ( platy ), refractive, resilient, and can range from transparent to opaque as needed.  Mica is stable when exposed to light, moisture, and extreme temperature.  It is inert to the action of water, most acids, oil, and is virtually unaffected by atmospheric action.

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