trisulphide

The two sulphides of antimony are called the trisulphide and the pentasulphide respectively.

A mixture of trioxide of antimony, sulphide of potassium, carbonate of potassium, and undecomposed trisulphide of antimony.

On heating in absence of air, it decomposes into the trisulphide and sulphur.

The Flowers of Antimony is an impure oxysulphide of antimony, with variable proportions of trioxide and undecomposed trisulphide.