Osmium Tetrasulfide

Osmium tetrasulfide
Names
	Other names Osmium(VIII) sulphide, tetrakis(sulfanylidene)osmium
Identifiers
3D model (JSmol)	Interactive image;
PubChem CID	149252039;
	InChI InChI=1S/Os.4S Key: CQZYSTFQZYMZKW-UHFFFAOYSA-N;
	SMILES S=[Os](=S)(=S)=S;
Properties
Chemical formula	OsS4
Molar mass	318.47 g·mol−1
Appearance	dark brown crystals
Solubility in water	insoluble
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

Osmium tetrasulfide is an inorganic compound, a salt of osmium metal and hydrogen sulfide acid with the chemical formula OsS
4.^[1]

Synthesis

Osmium tetrasulfide can be made by passing hydrogen sulfide through acidified solutions of osmium tetroxide:^[2]

OsO
4 + 4H
2S → OsS
4 + 4H
2O

Osmium tetrasulfide forms dark brown crystals, does not dissolve in cold water. Soluble in dilute HNO
3.^[3] Forms hydrates.^[4]

Osmium tetrasulfide decomposes upon melting.^[5]

↑ Bloxam, Charles Loudon (1888) (in en). Chemistry, Inorganic and Organic: With Experiments. P. Blakiston. p. 447. https://books.google.com/books?id=EFrPAAAAMAAJ&dq=osmium+tetrasulfide+OsS4&pg=PA447. Retrieved 4 April 2023.
↑ Satya, Prakash (2013) (in en). Advanced Chemistry of Rare Elements. S. Chand Publishing. p. 615. ISBN 978-81-219-4254-6. https://books.google.com/books?id=WB_4DwAAQBAJ&dq=osmium+tetrasulfide+OsS4&pg=PA615. Retrieved 4 April 2023.
↑ Gmelin, Leopold (1852) (in en). Hand Book of Chemistry. Cavendish Society. p. 411. https://books.google.com/books?id=1AI5AAAAMAAJ&dq=osmium+tetrasulfide+OsS4&pg=PA411. Retrieved 4 April 2023.
↑ Comey, Arthur Messinger (1896) (in en). A Dictionary of Chemical Solubilities: Inorganic. Macmillan and Company. p. 275. https://books.google.com/books?id=H9bPAAAAMAAJ&dq=osmium+tetrasulfide+OsS4&pg=PA275. Retrieved 4 April 2023.
↑ Sangeeta, D. (25 June 1997) (in en). Inorganic Materials Chemistry Desk Reference. CRC Press. p. 266. ISBN 978-0-8493-8900-9. https://books.google.com/books?id=bdGXyilNsGMC&dq=osmium+tetrasulfide+OsS4&pg=RA4-PP4. Retrieved 4 April 2023.

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