Chemistry:Eskebornite

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Eskebornite
General
CategoryCategory:Selenide minerals
Formula
(repeating unit)
CuFeSe2
Strunz classification2.CB.10a
Dana classification2.9.1.2
Crystal classTetragonal
Identification
ColorBrassy yellow
Crystal habitThick tabular crystals, massive
Cleavage{001} perfect
Mohs scale hardness3-3.5
|re|er}}Metallic
StreakBlack
DiaphaneityOpaque
Density5.35 (measured) 5.44 (calculated)
PleochroismCreamy yellow to yellowish brown
Ultraviolet fluorescenceNone
SolubilityInsoluble
Common impuritiesAg, S
Other characteristicsDistinctly magnetic
References[1][2][3][4]

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