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Formula: Sb3+4O4(SO4)(OH)2
Anhydrous sulphate, klebelsbergite group,
antimony-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 4.62 measured, 4.68 calculated
Hardness: 3½ to 4
Streak: White to yellow
Colour: Dark yellow; colourless to yellow in transmitted light
Solubility: Slowly soluble in cold concentated hydrochloric acid
Environments
Klebelsbergite is an alteration product of stibnite in
antimony deposits. Associated minerals include
stibnite, valentinite,
cervantite, kermesite,
stibiconite,
coquandite, peretaite,
onoratoite and cetineite.
(HOM).
Localities
At the type locality, Baia Sprie, Maramureș County, Romania, klebelsbergite occurs in the
oxidation zone of the stibnite deposit
(Mindat).
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