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Mullite

Mullite

A species of Minerals

Mullite or porcelainite is a rare silicate mineral of post-clay genesis. It can form two stoichiometric forms: 3Al2O32SiO2 or 2Al2O3 SiO2. Unusually, mullite has no charge-balancing cations present. As a result, there are three different aluminium sites: two distorted tetrahedral and one octahedral. Mullite was first described in 1924 for an occurrence on the Isle of Mull, Scotland. It occurs as argillaceous inclusions in volcanic rocks in the Isle of Mull, inclusions in sillimanite within a tonalite at Val Sissone, Italy and with emerylike rocks in Argyllshire, Scotland.

Hardness
Hardness:

6 - 7

Density
Density:

3.17 g/cm³

General Info About Mullite

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Physical Properties of Mullite

Colors
Colourless, white, yellow, pink, red, gray
Hardness
6 - 7 , Hard
Density
3.17 g/cm³, Normal Weight
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Chemical Properties of Mullite

Formula
Al4+2xSi2-2xO10-x
(x ~ 0.4)
Elements listed
Al, O, Si
Common Impurities
Ti,Fe,Na,K

Characteristics of Mullite

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Common Questions People Also Ask

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