Andalusite

Alternate Names: Chiastolite

Oxide	Analysis	Formula
Al2O3	62.90%	1.00
SiO2	37.10%	1.00
Oxide Weight		162.16
Formula Weight		162.16

Notes

As a member of the alumino-silicate family, it has the same chemistry as sillimanite and kyanite but differs in crystalline structure. Andalusite is volume-stable at elevated temperatures and achieves a slight permanent expansion of about 1.5% at around 2730F. The andalusite deposit in Hillsboro, NC is very clean with low iron and alkali impurities.

The Pyrofrac series of andalusite phyrophyllite materials are beneficeated to maximize the available andalusite.

Related Information

Andalusite Cross In Rock

Links

URLs	http://en.wikipedia.org/wiki/Andalusite Andalusite at Wikipedia
Materials	Pyrophyllite
Materials	Andafrac
Materials	Pyrofrac 0204
Materials	Pyrofrac 0304
Materials	Pyrofrac 1004
Materials	Pyrofrac 1655
Materials	Pyrofrac 1855
Materials	Pyrofrac 2023
Materials	Pyrofrac 2024
Materials	Pyrofrac 2034
Materials	Pyrofrac 4203
Materials	Pyrofrac 4205
Materials	Kyanite Kyanite is a granular material used in the manufacture of ceramics and abrasives. It is notable for low thermal expansion and one-way expansion on heating.
Materials	Alkatrol
Materials	Pyrofrac
Materials	Seriphyl
Typecodes	Aluminum Silicate Materials not classifiable as commonly known aluminum silicates. For example, kaolin is a common aluminum silicate.
Typecodes	Low Expansion Material Materials used to make bodies requiring low expansion (e.g. flameware, refractories). The individual particles of these materials have low expansion. Some of theme even expand at certain temperature ranges.
Minerals	Andalusite A low expansion alumina silicate mineral.

Mechanisms

Body Thermal Expansion	Volume stable at high temperatures.

By Tony Hansen
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