Antimony tetroxide

Antimony tetroxide is an inorganic compound with the formula Sb2O4.

This material, which exists as the mineral cervantite,[3] is white but reversibly yellows upon heating.

The material, with empirical formula SbO2, is called antimony tetroxide to signify the presence of two kinds of Sb centers.

Two polymorphs are known, one orthorhombic (shown in the infobox) and one monoclinic.

[1] Both forms feature octahedral Sb(V) centers arranged in sheets with distorted Sb(III) centers bound to four oxides.

NFPA 704 four-colored diamond Health 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroform Flammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oil Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen Special hazards (white): no code