Dysprosium(III) sulfide is a binary inorganic compound of dysprosium and sulfur with the chemical formula .
Synthesis Dysprosium(III) sulfide can be produced by treating metallic dysprosium with sulfur:
Once prepared, dysprosium(III) sulfide can be purified by chemical vapor transport using iodine.
Dysprosium(III) sulfide can also be prepared by treating dysprosium sulfate with hydrogen sulfide at elevated temperatures:
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:
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