Gadolinium monosulfide

Gadolinium monosulfide is a binary inorganic compound of gadolinium and sulfur with the chemical formula GdS.^[1][2]

Gadolinium monosulfide

Names
Other names Gadolinium (II) sulfide
Identifiers
CAS Number	12134-74-6
3D model (JSmol)	Interactive image
InChI InChI=1S/Gd.S Key: CHHGTOFGJMUJFT-UHFFFAOYSA-N
SMILES [Gd].[S]
Properties
Chemical formula	GdS
Molar mass	189.31 g·mol−1
Appearance	Crystals
Density	7.2 g/cm3
Melting point	2,300 °C (4,170 °F; 2,570 K)
Structure
Crystal structure	Cubic
Related compounds
Related compounds	Samarium monosulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

Heating stoichiometric amounts of pure substances in an inert atmosphere:

Gd + S → GdS

Also a reaction of gadolinium(III) oxide and gadolinium sesquisulphide can make it:^[3]

Gd₂O₃ + 2Gd₂S₃ + 3C → 6GdS + 3CO

Physical properties

Gadolinium monosulfide forms crystals of cubic system, space group Fm4m, unit cell parameter a = 0.5574 nm, Z = 4, isomorphous with NaCl.^[4][5]

GdS melts congruently at 2300 °C.

References

1. "Gadolinium monosulfide". NIST. Retrieved 30 July 2024.
2. "Gadolinium Sulfide". American Elements. Retrieved 30 July 2024.
3. Peshev, P.; Bliznakov, G.; Toshev, A. (April 1968). "On the preparation and some physical properties of gadolinium sesquisulphide and gadolinium monosulphide". Journal of the Less Common Metals. 14 (4): 379–386. doi:10.1016/0022-5088(68)90161-6. Retrieved 30 July 2024.
4. Predel, B. (1996). "Gd-S (Gadolinium-Sulfur)". Ga-Gd – Hf-Zr. Landolt-Börnstein - Group IV Physical Chemistry. f: 1–2. doi:10.1007/10501684_1447. ISBN 3-540-60344-1.
5. Donnay, Joseph Désiré Hubert (1978). Crystal Data: Inorganic compounds 1967-1969. National Bureau of Standards. p. C-70. Retrieved 30 July 2024.