Mineral Species
Umangite
Type Locality
No
Composition
Cu2Se2
Crystal System
Tetragonal
Status at Tsumeb
Questionable
Entry Number
Species; TSNB360
General Notes
Umangite was the first selenium mineral found at Tsumeb, listed by Geier (1973/74) as an extremely rare mineral which occurs as microscopic inclusions in dolomite. Pinch and Wilson (1977) comment that umangite was identified by ore microscopy as dark-reddish metallic inclusions in dolomite.
Lombaard et al. (1986) list umangite as an extremely rare mineral while Hughes (1987), despite his extensive research on the ore mineralogy at Tsumeb, makes no mention of it.
The occurrence of umangite at Tsumeb is considered questionable pending analytical confirmation.
Associated Minerals
dolomite (?)
