Characteristic
Iron(II) selenide refers to a number of inorganic compounds of ferrous iron and selenide (Se2−).
Chemical formula:FeSe
Molar mass:134.81 g/mol
Appearance:black crystals
Density:4.72 g/cm3
Melting point:965 °C (1,769 °F; 1,238 K)
Solubility in water:0.975 g/100 mL
Crystal structure:hexagonal / tetragonal
Application
It is used in electrical semiconductors.