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Mineralati

Minerals

Bustamite

bustamite

CaMn²⁺(Si2O6)

Bustamite: Mineral information, data and localities.

Bustamite: Mineral information, data and localities. — via www.mindat.org · Source

Overview

Bustamite is a calcium manganese inosilicate (chain silicate) and a member of the wollastonite group. Magnesium, zinc and iron are common impurities substituting for manganese. Bustamite is the high-temperature polymorph of CaMnSi2O6 and johannsenite is the low temperature polymorph. The inversion takes place at 830 °C (1,530 °F), but may be very slow.Bustamite could be confused with light-colored rhodonite or pyroxmangite, but both these minerals are biaxial (+) whereas bustamite is biaxial (−).

Scientific references

  1. Bustamite — Wikidata. https://www.wikidata.org/wiki/Q420801 Link
  2. Bustamite — Wikipedia. https://en.wikipedia.org/wiki/Bustamite Link