Cerium monosulfide

Cerium monosulfide is a binary inorganic compound of cerium and sulfur with the chemical formula CeS.^[1][2][3][4] This is the simplest of cerium sulfides.

Cerium monosulfide

Names
Other names Cerium sulfide (CeS)
Identifiers
CAS Number	12014-82-3
3D model (JSmol)	Interactive image
ChemSpider	76827115
CompTox Dashboard (EPA)	DTXSID7065170
InChI InChI=1S/Ce.S Key: INJMJSIZAXAEMH-UHFFFAOYSA-N
SMILES S=[Ce]
Properties
Chemical formula	CeS
Molar mass	172.18 g·mol−1
Appearance	Yellow crystalline solid
Density	5.9 g/cm3
Melting point	2,445 °C (4,433 °F; 2,718 K)
Solubility in water	insoluble
Structure
Crystal structure	cubic
Related compounds
Other anions	Cerium monoselenide Cerium monotelluride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

• Reduction reaction of dicerium trisulfide and cerium hydride:^[5]

Ce₂S₃ + CeH₂ → 3CeS + H₂

• Reacting cerium metal and sulfur in a planetary ball mill:^[6]

Ce + S → CeS

Physical properties

Cerium sulfide forms golden cubic crystals, with space group Fm3m and lattice parameter a = 5.763 Å. It has a NaCl-type structure.^[7]

The compound melts congruently at a temperature of 2450 °C, the highest out of any known sulfide.^[6]

Chemical properties

Cerium monosulfide has a wetting effect on metals, and it is relatively stable to metals other than platinum. It can react violently with platinum to form an intermetallic compound, platinum cerium.^[5]