Cerium monosulfide is a binary inorganic compound of cerium and sulfur with the chemical formula CeS. This is the simplest of cerium sulfides.
Synthesis Reduction reaction of dicerium trisulfide and cerium hydride:
Reacting cerium metal and sulfur in a planetary ball mill:
Physical properties Cerium sulfide forms golden cubic crystals, with space group Fmm and lattice parameter a = 5.763 Å. It has a NaCl-type structure.
The compound melts congruently at a temperature of 2450 °C, the highest out of any known sulfide.
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.
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