169833-94-7

Basic information

• Product Name: β-P4S7
• Synonyms: β-P4S7
• CAS NO: 169833-94-7
• Molecular Weight: 348.357
• Mol File: 169833-94-7.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: β-P4S7(CAS DataBase Reference)
• NIST Chemistry Reference: β-P4S7(169833-94-7)
• EPA Substance Registry System: β-P4S7(169833-94-7)

Safety Data

• Hazardous Substances Data: 169833-94-7(Hazardous Substances Data)

Upstream product

• 10544-50-0 sulfur 
• 12185-10-3 phosphorus 
• 20419-10-7 β-P4S5 
• 3937-40-4 triphenyl arsine sulfide 
• 15578-54-8 tetraphosphorus pentasulphide 
• 7704-34-9 sulfur 

Relevant articles and documents

Products and Mechanisms in the Oxidation of Phosphorus by Sulfur at Low Temperature

The oxidation of phosphorus by sulfur at low temperatures (8 diradical. This proposal is supported by the observed rate at which the sulfldes are formed and the distribution of the sulfide product stoichiometries. Photoinitiation of this oxidation at 0 °C produces a similar array of sulfldes. The differences in the product distributions between the thermal and photochemical processes facilitate the understanding of the mother-daughter relationships between the products. The effects of oxidation by sulfur and reduction by phosphorus have been determined for several of the known phosphorus sulfides. The characterizations of phosphorus compounds in molten mixtures of phosphorus and sulfur were performed by 31P NMR and Raman spectroscopy directly on the reaction mixtures.

The Molecular Composition of Solidified Phosphorus-Sulfur Melts and the Crystal Structure of β-P4S6

Phosphorus sulfur melts were annealed for one week at 673 K and then quenched in ice water. The solids were dissolved in CS2 and the concentrations of phosphorus sulfides were determined by (31)P NMR spectroscopy. Samples containing between 44 ant 70 mol% sulfur dissolved completely in CS2. Between 0 and 42 mol% remains an insoluble residue of red phosphorus. Above 72 mol% it consisted of sulfur chains linked by phosphorus atoms. The solutions contained mainly the congruently melting compounds P4S3,P4S7, and P4S10 having maximum concentrations at their stoichiometric c ompositions. Other compounds P4Sn (n=4-9) which decompose on heating, according to the phase diagram, were also found in surprisingly high concentrations. One of these was β-P4S6 which crystallizes in the monoclinic space group P21/C with the lattice parameters a=702.4(2), b=1205.6(2), c=1148.9(6) pm, and β=103.4(2)° Reaction of white phosphorus with sulfur was also investigated. In contrast to the results of previous authors, who described the system P4-S8 below 373 K as eutectic,we found that the elements reacted below this temperature.