Cervantite, also formerly known as antimony ochre: 188 — is an antimony oxide mineral with formula Sb3+Sb5+O4 (antimony tetroxide).
It was first described in 1850 for an occurrence in Cervantes, Galicia, Spain, and named for the locality. The mineral was questioned and disapproved, but re-approved and verified in 1962 based on material from the Zajaca-Stolice district, Brasina, Serbia. It occurs as a secondary alteration product of antimony bearing minerals, mainly stibnite.
References
James Dwight Dana A. M., Brush G. J. A system of mineralogy : Descriptive mineralogy, comprising the most recent discoveries. — New York : J. Wiley & Sons, 1884. /wiki/James_Dwight_Dana ↩
Mindat.org http://www.mindat.org/min-936.html ↩
Handbook of Mineralogy http://rruff.geo.arizona.edu/doclib/hom/cervantite.pdf ↩
Handbook of Mineralogy http://rruff.geo.arizona.edu/doclib/hom/cervantite.pdf ↩