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Lanthanum monosulfide

Names
IUPAC name lanthanum; sulfide
Identifiers
CAS Number	12031-30-0
3D model (JSmol)	Interactive image
ChemSpider	128947726
InChI InChI=1S/La.S/q+2;-2Key: GTXCIJGFTBRPNK-UHFFFAOYSA-N
SMILES .
Properties
Chemical formula	LaS
Molar mass	170.97 g·mol
Appearance	golden crystals
Density	5.61 g/cm
Melting point	2,300 °C (4,170 °F; 2,570 K)
Structure
Crystal structure	Cubic
Related compounds
Related compounds	Samarium monosulfide
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Lanthanum monosulfide is a binary inorganic chemical compound of lanthanum metal and sulfur with the chemical formula LaS.

Synthesis

Lanthanum monosulfide can be prepared from the effect of sulfur vapor on metallic lanthanum:

La + S → LaS

It can also be prepared from the reduction of La₂S₃ with metallic La.

Physical properties

Lanthanum monosulfide forms golden crystals of the cubic system, space group Fm3m, cell parameters a = 0.586 nm, Z = 4, structurally isomorphous with NaCl.

References

1. Cater, E. D.; Lee, T. E.; Johnson, E. W.; Rauh, E. G.; Eick, H. A. (1965). "Vaporization, thermodynamics, and dissociation energy of lanthanum monosulfide". NIST. p. 2684. Retrieved 26 July 2024.
2. "Lanthanum Monosulfide". American Elements. Retrieved 26 July 2024.
3. Soviet Research on Complex and Coordination Compounds: Inorganic complexes. 1960. p. 579. Retrieved 26 July 2024.
4. Perry, Dale L. (19 April 2016). Handbook of Inorganic Compounds. CRC Press. p. 220. ISBN 978-1-4398-1462-8. Retrieved 26 July 2024.
5. Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3548. ISBN 978-0-412-30120-9. Retrieved 26 July 2024.

• Lanthanum compounds
• Sulfides
• Monosulfides
• Rock salt crystal structure