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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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T
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Talc
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INFOTEXT
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1992-09-02
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A mineral, hydrous magnesium silicate,
Mg3Si4O10(OH)2. It occurs in tabular
crystals, but the massive impure form, known
as steatite or soapstone, is more common. It
is formed by the alteration of magnesium
compounds, and usually found in metamorphic
rocks. Talc is very soft, ranked 1 on the
Mohs' scale of hardness. It is used in
powdered form in cosmetics, lubricants, and
as an additive in paper manufacture. French
chalk and potstone are varieties of talc.
Soapstone has a greasy feel to it, and is
used for carvings such as Inuit sculptures.