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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)

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