Characteristic
Iron(III) sulfide, also known as ferric sulfide or sesquisulfide, is one of the three iron sulfides besides FeS and FeS2. It is a solid, black powder but decays at ambient temperature into a yellow-green powder.
Chemical formula:Fe2S3
Molar mass:207.90 g/mol
Appearance:yellow-green
Density:4.3 g/cm3
Melting point:decomposition
Solubility in water:very slightly soluble
This is a relatively unstable artificial product that does not occur in nature.