Valentinite (Sb2O3)

 Valentinite, its CAS number is 1317-98-2. The molecular formula of  Valentinite (CAS NO.1317-98-2 ) is O₃Sb₂. The molecular weight is 291.50 g/mol. And it is colorless, white, yellow, reddish or gray.

 Valentinite (CAS NO.1317-98-2 )  was first discovered near Allemont in France towards the end of the 18th century; the first description of its occurrence in the region of Pribram in Bohemia comes roughly from the same time. This particular locality at one time produced the very best crystals of this mineral. The largest crystals found there measured up to 3 cm.
Valentinite is a weathering product of antimony veins, where it forms as a seondary mineral through oxidation in the upper parts of the deposits. It forms columnar to needle-shaped crystals. A rich deposit of valentinite has been found only in one locality- the Constantine province of Algeria. This is the only deposit where it is mined as an ore, with 83% antimony. In all other locations it occurs in negligible quantities.

IARC Cancer Review: Group 2B IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 47 ,1989,p. 291.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 47 ,1989,p. 291.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human Inadequate Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 47 ,1989,p. 291.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) .

Confirmed carcinogen. When heated to decomposition, Valentinite (CAS NO.1317-98-2 ) emits toxic vapors of Sb.

Highly gem-like pearly luster, often fibrous oxide mineral.  Translucent to opaque in massive specimens.
Classification Code of Valentinite (CAS NO.1317-98-2 ) : Tumor data