General Information:
Chemical Formula:
CoSbAs
Composition:
(Molecular Weight = 255.60 gm)
Cobalt 23.06 % Co
Antimony 47.63 % Sb
Arsenic 29.31 % As
Empirical Formula:
CoSbAs
Environment:
In Cu-Co-sulfide skarns. Microscopic crystals in chalcopyrite grains. May be a member of the lollingite group and the arsenic-dominat analogue of costibite.
IMA Status:
Approved IMA (Dana # Added)
Locality:
On dumps from an abandoned mine in the Tunaberg deposit, in the southeastern part of Bergslagen, about 100 km southwest of Stockholm, Sweden.
Name Origin:
For Prof. Dr. Ing Soen Oen (1928-1996), Professor of Petrology, Mineralogy and Ore Geology at the University of Amsterdam.
Physical Properties:
Color:
silver white.
Density:
7.92
Diaphaniety:
Opaque
Habits:
Anhedral Grains - Granular minerals without the expression of crystal shapes, Microscopic Crystals - Crystals visible only with microscopes.,
Hardness:
5-5.5 - Apatite-Knife Blade
Luster:
Metallic
Streak:
gray
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