Dysprosium(III) sulfide

Dysprosium(III) sulfide is a binary inorganic compound of dysprosium and sulfur with the chemical formula Dy₂S₃.

Dysprosium(III) sulfide

Names
Other names Didysprosium trisulfide
Identifiers
CAS Number	12133-10-7
3D model (JSmol)	Interactive image
ChemSpider	21248508
ECHA InfoCard	100.031.995
EC Number	235-208-2
PubChem CID	24837760
CompTox Dashboard (EPA)	DTXSID201014282
InChI InChI=1S/3Dy.3S/q;2*+3;3*-2 Key: SVCBLQQYIMDMCB-UHFFFAOYSA-N
SMILES [Dy+3].[Dy+3].[S-2].[S-2].[S-2]
Properties
Chemical formula	Dy2S3
Molar mass	421.18 g·mol−1
Appearance	brown crystals
Density	6.08 g/cm3
Solubility in water	moderately soluble
Related compounds
Related compounds	Lanthanum(III) sulfide
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

Heating of pure substances in an inert atmosphere or vacuum:

2Dy + 3S → Dy₂S₃

The effect of hydrogen sulfide on dysprosium(III) oxide:

Dy₂O₃ + 3H₂S → Dy₂S₃ + 3H₂O

Physical properties

Didysprosium trisulfide forms yellow-orange-brown crystals of two modifications: cubic and monoclinic systems.

There is evidence that Dy₂S₃ forms crystals of brown-red, black, or green color.

The crystals are stable in dry air, but in humid air they are slowly hydrolyzed. The compound is moderately soluble in water and acids.

Chemical properties

Dy₂S₃ oxidizes when strongly heated in air:

Dy₂S₃ + 3O₂ → Dy₂O₂S + 2SO₂