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المواصفات الفيزيائية للكاولين للتوريدات والصادرات

Chemical Classification

Class - Silicates - Subclass phyllosilicates.

Color

usually white, colorless, greenish or yellow.

Streak

white.

Luster

earthy.

Diaphaneity

Crystals are translucent.

Cleavage

 perfect in one direction, basal.

Mohs Hardness

1.5 - 2 (can leave marks on paper).

Specific Gravity

2.6 (average).

Diagnostic Properties

Earthy - Dull, clay-like fractures with no visible crystalline affinities.

Chemical Composition

Al2Si2O5(OH)4, Aluminum Silicate Hydroxide.

Crystal System

Triclinic.

Uses

In the production of ceramics, as a filler for paint, rubber and plastics and the largest use is in the paper industry to produce a glossy paper such as is used in most magazines.

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