Ytterbium(II) sulfide

Ytterbium sulfide is a binary inorganic compound of ytterbium and sulfur with the chemical formula YbS.

Synthesis

Synthesis of ytterbium sulfide can be via a reaction of pure substances in an inert atmosphere:
An alternative synthesis is by comproportionation of ytterbium(III) sulfide and ytterbium metal in vacuum at 1000–1100 °C:

Physical properties

Ytterbium sulfide forms black crystals of cubic symmetry, space group Fm3m, cell parameter a = 0.5658 nm, Z = 4.
Ytterbium sulfide demonstrates semiconductor behavior.