Structure and Synthesis
The molecule has C3v symmetry. It is a derivative of the tetrahedral (P4) unit from insertion of sulfur into three P-P bonds. The P-S and P-P distances are 2.090 and 2.235 Å, respectively. P4Se3 and P4S3 adopt the same structures. These compounds can be melted together and form mixed crystals of one dissolved in the other. Under higher temperatures, mixed chalcogenide molecules P4S2Se and P4SSe2 will form.
P4S3 is produced by the reaction of red or white phosphorus with sulfur. Excess sulfur gives phosphorus pentasulfide (P4S10). It is estimated that 150 ton/y were produced in 1989.
Read more about this topic: Phosphorus Sesquisulfide
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