Promethium(III) sulfide

Promethium(III) sulfide
Names
	Other names Dipromethium trisulfide
Identifiers
CAS Number	12337-21-2;
3D model (JSmol)	Interactive image;
	InChI InChI=1S/2Pm.3S/q2+3;3-2 Key: DWKHKOHUCVHMOJ-UHFFFAOYSA-N;
	SMILES [Pm+3].[Pm+3].[S-2].[S-2].[S-2];
Properties
Chemical formula	Pm2S3
Molar mass	386 g·mol−1
Appearance	garnet red crystals
Density	g/cm3
Structure
Crystal structure	orthorhombic
Related compounds
Related compounds	Lanthanum(III) sulfide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Promethium(III) sulfide is a binary inorganic compound with the chemical formula Pm₂S₃.

Synthesis

The compound can be prepared by reacting promethium and sulfur in stoichiometric amounts at 500 °C:^{[citation needed]}

2 Pm + 3 S → Pm₂S₃

The compound forms garnet red crystals of the orthorhombic system, space group I43d^[1] and exists in α and β forms.^[2]

^ Vassiliev, Valery P.; Lysenko, Valery A.; Gaune-Escard, Marcelle (1 June 2019). "Relationship of thermodynamic data with Periodic Law". Pure and Applied Chemistry. 91 (6): 879–893. doi:10.1515/pac-2018-0717. ISSN 1365-3075. Retrieved 27 July 2024.
^ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3779. ISBN 978-0-412-30120-9. Retrieved 27 July 2024.