Sengierite

Sengierite
General
Category Oxide and Hydroxide
Formula
(repeating unit)		 Cu2(OH)2[UO2|VO4]2·6H2O
Crystal system Monoclinic
Space group Monoclinic 2/m
Identification
Color Olive-green, yellowish green
Cleavage Perfect on {001}
Tenacity Brittle
Mohs scale hardness 2,5
Luster Adamantine, Vitreous
Streak Light green
Diaphaneity Transparent
Specific gravity 4.05
Density 4.05 g/cm3 (Measured) 4.1 g/cm3 (Calculated)
Refractive index nα = 1.760 - 1.770 nβ = 1.920 - 1.940 nγ = 1.940 - 1.970
2V angle Measured: 37° to 39°, Calculated: 36°
Other characteristics Radioactive

Sengierite is a rare oxide and hydroxide mineral, chemically a copper and uranyl vanadate, belonging to the carnotite group. Its chemical formula is Cu2(OH)2[UO2|VO4]2·6H2O.[1][2]

Sengierite was first discovered at the Luiswishi Mine about 20 km north of Lubumbashi in Katanga Province in the Democratic Republic of the Congo and was first described in 1949 by Johannes F. Vaes and Paul F. Kerr, the mineral was named after Edgar Sengier (1879–1963), a former Director of the Union Minière du Haut Katanga.[3]

References

  1. ↑ "Sengierite: Sengierite mineral information and data". mindat.org. Retrieved 2018-08-09.
  2. ↑ John W. Anthony, Richard A. Bideaux, Kenneth W. Bladh, and Monte C. Nichols, Eds., Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. PDF
  3. ↑ J. F. Vaes, Paul F. Kerr (1949). "Sengierite: a preliminary description" (PDF). American Mineralogist. 34: 109–120.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.