Dysprosium(III) sulfide is a binary inorganic compound of dysprosium and sulfur with the chemical formula .
Synthesis.
Heating of pure substances in an inert atmosphere or vacuum:
The effect of hydrogen sulfide on dysprosium(III) oxide:
Physical properties.
Didysprosium trisulfide forms yellow-orange-brown crystals of two modifications: cubic and monoclinic systems.
There is evidence that 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.
 oxidizes when strongly heated in air:
References.
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