Holmium(III) sulfide
Holmium sulfide is the sulfide salt of holmium, with the chemical formula of.
Preparation
Holmium sulfide can be obtained by the reaction of holmium(III) oxide and hydrogen sulfide at 1325 °C.It can also be prepared by treating holmium(III) sulfate with hydrogen sulfide at elevated temperatures.
In another preparation, it can be produced by treating metallic holmium with sulfur:
Once prepared, holmium sulfide can be purified by chemical vapor transport using iodine.