Andalusite
Pyrophillite
Chemistry
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Links to Other Materials
- Sericite - Related
- Pyrophyllite - Related
- Andafrac - Related
- Kyanite - Related
- Cache
Miscellaneous
- Family: AlumSilicate
- Region: None
- Mined At: Unspecified
- Raw Mineral: Yes
- Generic: No
Notes
As a member of the alumino-silicate family, it has the same chemistry as sillimanite and kyanite (Al2O3.SiO2) 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 are beneficeated to maximize the available andalusite.
URLs
- Wikipedia definition - http://en.wikipedia.org/wiki/Andalusite
Suppliers
- Piedmont Minerals
Authors
- Tony Hansen (Owner)
Pictures
-
Andalusite Cross In Rock
XML
<?xml version="1.0" encoding="UTF-8"?>
<material name="Andalusite" descrip="Pyrophillite" generic="0" rawmineral="1" searchkey="Chiastolite" loi="0.00">
<families>
<family name="AlumSilicate"/>
</families>
<oxides>
<oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="62.900" tolerance=""/>
<oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="37.100" tolerance=""/>
</oxides>
<references>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
</references>
<suppliers>
<supplier name="Piedmont Minerals" country="US" url="" label=""/>
</suppliers>
<notes>
<note>As a member of the alumino-silicate family, it has the same chemistry as sillimanite and kyanite (Al2O3.SiO2) 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 are beneficeated to maximize the available andalusite.</note>
</notes>
<pictures>
<picture description="Andalusite Cross In Rock" filename="andalusite_cross_in_rock_.jpg"/>
</pictures>
</material>
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