Gadolinium monosulfide

Gadolinium monosulfide is a binary inorganic compound of gadolinium and sulfur with the chemical formula GdS.

Synthesis

Heating stoichiometric amounts of pure substances in an inert atmosphere:
It can be formed in a reaction between carbon, gadolinium(III) oxide, and gadolinium sesquisulphide:

Physical properties

Gadolinium monosulfide forms crystals of cubic system, space group Fm4''m'', unit cell parameter a = 0.5574 nm, Z = 4, isomorphous with NaCl.
GdS melts congruently at 2300 °C.