Ytterbium(II) sulfide

Ytterbium(II) sulfide is a binary inorganic compound of ytterbium and sulfur with the chemical formula YbS.^[1][2]

Ytterbium(II) sulfide

Names
Other names Ytterbium monosulfide, ytterbium(II) sulfide
Identifiers
CAS Number	23344-43-6
3D model (JSmol)	Interactive image
ChemSpider	103867627
InChI InChI=1S/S.Yb Key: QHGZBASAVJOMNS-UHFFFAOYSA-N
SMILES [Yb+2].[S-2]
Properties
Chemical formula	SYb
Molar mass	205.11 g·mol−1
Appearance	black crystals
Density	6.68 g/cm3
Melting point	2,038 °C (3,700 °F; 2,311 K)
Structure
Crystal structure	cubic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

Synthesis of ytterbium(II) sulfide can be via a reaction of pure substances in an inert atmosphere:^[3]

Yb + S → YbS

An alternative synthesis is by comproportionation of ytterbium(III) sulfide and ytterbium metal in vacuum at 1000–1100 °C:

Yb₂S₃ + Yb → 3YbS

Physical properties

Ytterbium(II) sulfide forms black crystals of cubic symmetry, space group Fm3m, cell parameter a = 0.5658 nm, Z = 4.^[4]

Ytterbium(II) sulfide demonstrates semiconductor behavior.^[5]