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Mineralati

Minerals

Mullite

mullite

3Al2O3·2SiO2

Mullite Mineral Specimen For Sale

Mullite Mineral Specimen For Sale — via www.dakotamatrix.com · Source

Overview

Mullite or porcelainite is a rare silicate mineral formed during contact metamorphism of clay minerals. 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.

Scientific references

  1. Mullite — Wikidata. https://www.wikidata.org/wiki/Q418875 Link
  2. Mullite — Wikipedia. https://en.wikipedia.org/wiki/Mullite Link