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Mineralati

Minerals

Carminite

carminite

PbFe³⁺2(AsO4)2(OH)2

Carminite mineral information and data

Carminite mineral information and data — via www.dakotamatrix.com · Source

Overview

Carminite (PbFe3+2(AsO4)2(OH)2) is an anhydrous arsenate mineral containing hydroxyl. It is a rare secondary mineral that is structurally related to palermoite (Li2SrAl4(PO4)4(OH)4). Sewardite (CaFe3+2(AsO4)2(OH)2) is an analogue of carminite, with calcium in sewardite in place of the lead in carminite. Mawbyite is a dimorph (same formula, different structure) of carminite; mawbyite is monoclinic and carminite is orthorhombic. It has a molar mass of 639.87 g. It was discovered in 1850 and named for the characteristic carmine colour.

Identification characteristics

  • Mohs hardness 3.5

Scientific references

  1. Carminite — Wikidata. https://www.wikidata.org/wiki/Q3660390 Link
  2. Carminite — Wikipedia. https://en.wikipedia.org/wiki/Carminite Link