Eskebornite

Eskebornite
General
Category Category:Selenide minerals
Formula
(repeating unit)
CuFeSe2
Strunz classification 2.CB.10a
Dana classification 2.9.1.2
Crystal class Tetragonal
Identification
Color Brassy yellow
Crystal habit Thick tabular crystals, massive
Cleavage {001} perfect
Mohs scale hardness 3-3.5
Luster Metallic
Streak Black
Diaphaneity Opaque
Density 5.35 (measured) 5.44 (calculated)
Pleochroism Creamy yellow to yellowish brown
Ultraviolet fluorescence None
Solubility Insoluble
Common impurities Ag, S
Other characteristics Distinctly magnetic
References

Eskebornite is a selenide mineral with the formula CuFeSe2.[1][2] It crystallizes in the tetragonal system and it has a brassy colour. Eskebornite is sometimes found as thick tabular crystals, but is more often found intergrown with other selenides.[3] It is part of the chalcopyrite group and forms a series with chalcopyrite.[4]

Occurrence

Eskebornite was first identified in 1949 by Paul Ramdohr in the Eskaborn Adit, Tilkerode (Abberode), Harz, Saxony-Anhalt, Germany,[5] which it was also named after. It is often found with other selenides, including clausthalite, tiemannite, berzelianite, naumannite, umangite, geffroyite, and chaméanite, but also with other minerals like chalcopyrite, uraninite, ankerite, and dolomite.[3]

See also

References

  1. "Eskebornite: Eskebornite mineral information and data.". www.mindat.org. Retrieved 2016-10-24.
  2. Barthelmy, Dave. "Eskebornite Mineral Data". webmineral.com. Retrieved 2016-10-24.
  3. 1 2 "Handbook of Mineralogy, Eskebornite" (PDF).
  4. "Chalcopyrite-Eskebornite Series: Chalcopyrite-Eskebornite Series mineral information and data.". www.mindat.org. Retrieved 2016-10-24.
  5. D.C. Harris, E.A.J. Burke. "Eskebornite, two Canadian occurrences" (PDF). The Canadian mineralogist. 10: 786–796.
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