Natural Indian Minerals
China Clay Minerals

Name and Composition - White Clay; Hydroxyl aluminium silicate: AI4 (Si4O10) (OH)8.

Physical Properties - It is white, grey and yellowish coloured, fine grained amorphous mineral with dull to earthy luster. It is soft having hardness 2.0 to 2.5; easily crumbles to powder and soils figure, sp.gr. 2.61 to 2.68.

Mode of Occurrence - Generally occurs as bedded and pocket deposit.

Uses - Depending upon plasticity & shrinkage, it is used in different industries. The refined/processed china clay is consumed by ceramic, cosmetic, paint, paper, pesticide, refractory, rubber etc. industries. It is also used in cement, chemicals, glass, textile, abrasives, dry cell (batteries), electrical appliances, electrode etc.

Mineral based Industries – Pulverisers, washeries, processing/refining plants, ceramic industries.

Industrial Prospects – Pulverisers, washeries, processing/refining plants, ceramic industries.


Physical Properties
Hardness
Sp. gr.
Brightness
M O R
2.0 to 2.5
2.61 to 2.68
86 to 94
10 to 30
Chemical Properties
Silica (SiO2)
Alumina (Al2O3)
Ferric Oxide (Fe2O3)
Titanium Dioxide (TiO2)
Magnesium Oxide (MgO)
Calcium Oxide (CaO)
Potassium Oxide (K2O)
Sodium Oxide (Na2O)
Loss on Ignition
45 - 48%
36 - 38%
0.5 - 1 %
0.75 - 1.25%
Less than .5%
Less than 1%
Less than .5%
Less than .5%
13.0 to 14.5
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