| Name: Talc |
Origin of name:
from the Arabic talq |
Chemical formula: Mg3Si4O10(OH)2 |
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Although it is best known as the primary ingredient of talcum powder, talc is a soft, fire-resistant mineral which has many industrial uses. It is used in making ceramic articles for the electrical industry, and as a filler for paint, rubber and insecticides.
Talc forms by alteration of magnesium-rich rocks and minerals at low temperatures and high pressure. Rocks consisting maily of talc are known as steatite or soapstone, and are soft enough to carve into ornaments. |
Crystal system: monoclinic |
| Class: Silicates |
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| Hardness: 1 |
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| Cleavage: perfect |
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| Colour: typically pale green, white, greyish or yellowish white |
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| Specific gravity: 2.7-2.8 |
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