Demesmaekerite

Demesmaekerite

A specimen of demesmaekerite associated with blue chalcomenite crystals
General
Category Oxide mineral
Formula
(repeating unit)		 Pb2Cu5(UO2)2(SeO3)6(OH)6•2H2O
Strunz classification 4.JJ.20
Crystal system Triclinic
Crystal class Pinacoidal (1)
(same H-M symbol)
Space group P1

Demesmaekerite is an uranium mineral with the chemical formula: Pb2Cu5(UO2)2(SeO3)6(OH)6•2H2O.

It is named after the Belgian mineralogist, who worked at the Musonoi Mine, Gaston Demesmaeker (born 1911).[1] It is a secondary mineral which contains lead, copper and (the rarer in minerals) selenium, it is a bottle green to brown/yellow colour, its crystal habit changes from one form to another form depending on where it is found. It has a Mohs hardness of about 2-3.

It can be found alongside other very rare selenium-bearing uranium ores, such as haynesite, guilleminite, marthozite and piretite.[2]

References

  1. ↑ http://www.handbookofmineralogy.org/pdfs/demesmaekerite.pdf
  2. ↑ Demesmaekerite: Demesmaekerite mineral information and data
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