Terbium monosulfide is a binary inorganic compound of terbium and sulfur with the chemical formula TbS.

Synthesis

Terbium monosulfide can be synthesised by heating stoichiometric amounts of pure substances in an inert atmosphere:

Tb + S → TbS

Physical properties

Terbium monosulfide forms crystals of cubic system, space group Fm3m, isomorphous with NaCl.