Formula: Sb3+Sb5+O4
Simple oxide, the orthorhombic paramorph of clinocervantite, which is monoclinic
Specific gravity: 6.64
Hardness: 4 to 5
Streak: Light yellow, white
Colour: Yellow, off-white, reddish-white; colourless in transmitted light

Hydrothermal environments

Cervantite is a secondary mineral formed from the oxidation of stibnite, and commonly found as pseudomorphs after it and associated with it (Webmin, Dana, HOM).

At Semsa, Algeria, cervantite occurs with
valentinite (Dana)

At the Zhenwei (Zhenxu) antimony-gold deposit, Shanglin county, Guangxi, China, cervantite occurs in the upper oxidation zone, together with kermesite (Minrec 38.1.15-16).

At the Xikuangshan antimony deposit, Lengshuijiang county, Hunan, China, cervantite occurs in the oxidation zone together with valentinite, stibiconite, kermesite and senarmontite (Minrec 38.1.8).

The diagram below is a Pourbaix diagram for antimony (GSJ). It shows the relationship between antimony Sb and cervantite/clinocervantite SbO4.

Pourbaix antimony.jpg

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