Cerium monoselenide
# Cerium monoselenide

Cerium monoselenide is an inorganic compound with the chemical formula CeSe. It exists in the form of $Ce^{3+}Se^{2−}(e^−).$

## Preparation

Cerium monoselenide can be obtained by reducing cerium selenide with metallic sodium at 600 °C (or calcium at 1000 °C):

    $Ce_2Se_3$ + 2Na → 2CeSe + $Na_2Se$

The reduction of cerium selenide by cerium dihydride can also produce cerium monoselenide:

    $Ce_2Se_3$ + $CeH_2$ → 3 CeSe + $H_2↑$

## Properties

Like many other rare earth monochalcogenides, Cerium monoselenide has metallic-type electrical conductivity and a NaCl-type crystal structure.

