Holmium(III) selenide

Holmium(III) selenide is an inorganic compound with the chemical formula Ho2Se3.

Preparation
Holmium(III) selenide can be obtained from the reaction of holmium and selenium (in the presence of iodine):


 * 2 Ho + 3 Se -> Ho2Se3

It can also be prepared by reacting holmium oxide and hydrogen selenide at high temperature.


 * Ho2O3 + 3 H2Se -> Ho2Se3 + 3 H2O

Properties
Holmium(III) selenide can form orthorhombic AgHoSe2 in the binary system of silver selenide.