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Mineralati

Minerals

Cummingtonite

cummingtonite

☐Mg2Mg5Si8O22(OH)2

Cummingtonite Mineral Specimen For Sale

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

Overview

Cummingtonite ( KUM-ing-tə-nyte) is a metamorphic amphibole with the chemical composition (Mg,Fe2+)2(Mg,Fe2+)5Si8O22(OH)2, magnesium iron silicate hydroxide. Monoclinic cummingtonite is compositionally similar and polymorphic with orthorhombic anthophyllite, which is a much more common form of magnesium-rich amphibole, the latter being metastable. Cummingtonite shares few compositional similarities with alkali amphiboles such as arfvedsonite, glaucophane-riebeckite. There is little solubility between these minerals due to different crystal habit and inability of substitution between alkali elements and ferro-magnesian elements within the amphibole structure.

Scientific references

  1. Cummingtonite — Wikidata. https://www.wikidata.org/wiki/Q418873 Link
  2. Cummingtonite — Wikipedia. https://en.wikipedia.org/wiki/Cummingtonite Link