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Sillimanite

Miscellaneous

• Family: Refractory
• Region: None
• Mined At: Unspecified
• Raw Mineral: Yes
• Generic: No

Notes

Theoretical formula: Al2O3 . SiO2
This is used in high temperature refractory bodies, kiln shelves, etc.

Note

(Richard Willis)

Mineral, of the ideal form Al₂[O, SiO₄] with a typical empirical analysis of Al₂O₃ 63.1%, SiO₂ 36.9%
Hardness: 6-7 Density: 3.2 Insoluble in acids
An alumina-silicate common to environs of cordierite, andalusite, and spinel; metamorphic by contact.

Suppliers

• Generic
  

Authors

• Tony Hansen (Owner)

XML

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<material name="Sillimanite" descrip="" generic="0" rawmineral="1" searchkey="" loi="0.00">
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<family name="Refractory"/>
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<notes>
<note>Theoretical formula: Al2O3 . SiO2
This is used in high temperature refractory bodies, kiln shelves, etc.</note>
<note>Mineral, of the ideal form Al&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;[O, SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;] with a typical empirical analysis of Al&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;O&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt; 63.1%, SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt; 36.9%&lt;BR&gt;
Hardness: 6-7 Density: 3.2 Insoluble in acids&lt;BR&gt;
An alumina-silicate common to environs of cordierite, andalusite, and spinel; metamorphic by contact.&lt;BR&gt;

</note>
</notes>
</material>

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