Europium monoselenide

Europium monoselenide is a binary inorganic compound of europium and selenium with the chemical formula EuSe. The compound forms black crystals.

Synthesis

 * Heating stoichiometric amounts of pure substances in a vacuum ampoule at 800 °C:
 * Eu + Se -> EuSe


 * Heating of europium(II) oxalate with an excess of selenium in a hydrogen current:
 * EuC2O4 + Se + H2 -> EuSe + H2O + CO2 + CO

Physical properties
Europium monoselenide forms black (or brown) crystals of cubic syngony, spatial group Fm3m, cell parameters a = 0.6185 nm, Z = 4.

Ferromagnetic at curie temperature 7 K.