Guilleminite

Guilleminite

Guilleminite and malachite
General
Category Oxide minerals
Formula
(repeating unit)		 Ba(UO2)3(SeO3)2(OH)4•3H2O
Strunz classification 4.JJ.10
Crystal system Orthorhombic
Crystal class Pyramidal (mm2)
H-M symbol: (mm2)
Space group P21nm
Identification
References [1][2][3]

Guilleminite (Ba(UO2)3(SeO3)2(OH)4•3H2O) is a uranium mineral named by R. Pierrot, J. Toussaint, and T. Verbeek in 1965 in honor of Jean Claude Guillemin (1923–1994), a chemist and mineralogist. It is a rare uranium/selenium mineral found at the Musonoi Mine in the Katanga Province of the Democratic Republic of the Congo.[2]

This secondary mineral also includes barium in its structure, in addition to selenium and uranium. It is bright yellow in colour and usually has an acicular crystal habit. It has a Mohs hardness of 2–3.[4]

References

  1. ↑ Mineralienatlas
  2. 1 2 Guilleminite: Guilleminite mineral information and data on Mindat.org
  3. ↑ Webmineral data
  4. ↑ Pierrot R, Toussaint J, Verbeek T. Bull. Soc. Franc. Mineral. Crist. 1965; 88: 132.
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