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ALUMINA-SILICATE

Miscellaneous

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

Notes

(Richard Willis)

The silicate of aluminum of the form Al₂O₃, SiO₂ with a minimal apportioning of Al₂O₃ 39.5% and SiO₂ 46.5%. When it occurs naturally in its hydrated (i.e., with H₂O) and layered (i.e., sandwiched aluminum and silicon — see soils) it is known as a clay mineral (kaolinite, dickite, etc.) see clay minerals
The term is normally used in contrast to “ferro-silicate” and “magnesio-silicate” to distinguish clay earths which have not had their aluminum replaced by iron and/or magnesium. As a comparison, anhydrated silicates of aluminum occurring naturally are usually gem stones rather than clays.

Authors

• Richard Willis (Owner)

XML

<?xml version="1.0" encoding="UTF-8"?>
<material name="ALUMINA-SILICATE" descrip="" generic="0" rawmineral="1" searchkey="" loi="0.00">
<families>
<family name="Raw Mineral"/>
</families>
<notes>
<note>The silicate of aluminum of the form 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;, SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt; &lt;/SUB&gt;with a minimal apportioning 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; 39.5% and SiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt; 46.5%. When it occurs naturally in its hydrated (i.e., with H&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;O) and layered (i.e., sandwiched aluminum and silicon &amp;#151; &lt;FONT SIZE=2&gt;see &lt;B&gt;&lt;I&gt;soils&lt;/I&gt;&lt;/B&gt;)&lt;/FONT&gt; it is known as
a clay mineral (kaolinite, dickite, etc.) &lt;FONT SIZE=2&gt;see &lt;B&gt;&lt;I&gt;clay minerals&lt;/I&gt;&lt;/B&gt;&lt;/FONT&gt;&lt;BR&gt;
The term is normally used in contrast to &amp;#147;ferro-silicate&amp;#148; and &amp;#147;magnesio-silicate&amp;#148; to distinguish clay earths which have not had their aluminum replaced by iron and/or magnesium. As a comparison, anhydrated silicates of aluminum occurring naturally are usually gem stones rather than clays.&lt;BR&gt;


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

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