Natural Indian Minerals
Quartz Minerals

Name and Composition - Silicon dioxide: SiO2.

Physical Properties - Generally colourless, white to milky white (some varieties are coloured), transparent to opaque. The crystals are hexagonal prisms terminated by rhombohedra faces, prism faces are always striated perpendicular to their length. Lusture is vitreous, fracture conchoidal, hardness: 7, sp.gr. 2.65.

Mode of Occurrence - In the form of veins, reefs and also in pegmatites.

Uses - It is mainly used for glass making. The primary use of silica is in manufacturing of all types of glass wares, ceramics and ceremis glazes. It is also used for manufacturing refractories, silica bricks, ferro –sillicon and other ferro-alloys. It is used as flux in smelthing of base metal ores and as source of silicon metal. High quality quartz crystals are used in electronic devices, multiple telephonic system, depth sounding devices, range finders, chronometers etc.

Mineral based Industries – Glass and ceramic industries, pulverizing units.

Industrial Prospects – Glass and ceramic industries, pulverizing units.


Physical Properties
Hardness
Sp. gr.
Reflectance
Density
7
2.65
88 - 97
2.65 g/cm3
Chemical Properties
Silica (SiO2)
Alumina (Al2O3)
Potassium Oxide (K2O)
Sodium Oxide (Na2O)
Calcium Oxide (CaO)
Ferric Oxide (Fe2O3)
Manesium Oxide (MgO)
Titanium Oxide (TiO2)
Loss on Ignition LOI (950oC)
99.80 - 99.96 %
0.06 - 0.07 %
< 0.015 %
< 0.015 %
< 50 PPM
< 0.01 %
< 30 PPM
< 0.01 %
< 0.10 %
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