Silicon kinds are found in nature as following ores: crystalline silicon, amorphous silicon, hidden crystal silicon, and the kind of siliceous which has application in industry is power siliceous which is obtained from siliceous grounding.
Quartz, tridymit and crystobalite are three basic polymorphs of siliceous which have known well in nature.
Each of these ores creates in special condition and has defined physical and mineralogy specifications. These polymorphs are converted to each other in different heating conditions.
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Silicon is derived from Latin term slices means flint (hard stone). Silicon is as the second enormous element in layers of earth with the amount of 25%.
Silicon is not melt able, hard colorless or white or dark gray with symbol "si", its atomic number is 14, its atomic weight is 28.085, special weight is 2.33g/cm3, hardness is 7 in scale of mouse and power color is white.
Silicon is the basic part of sandstone and siliceous stone, quartz and quartzite, crystal, artificial silicon and chemical silicon, clay ores, granite
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Silicon is applied for all ores which have sio2 even though they have different geological and physical conditions from the point of crystal view. These ores created in different geological conditions. Pure silicon is colorless to white.
Crystal unit or the molecule of silicon has sio3 and there fore its crystal grains are crystalline with electronically misconnection networks.
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