Europium (II) sulfide is the inorganic compound with the chemical formula EuS. It is a black, air-stable powder.
Molar mass： 184.03 g/mol
Appearance： black powder
Melting point： 2,250 °C (4,080 °F; 2,520 K)
Magnetic susceptibility (χ)：+25,730;·10−6 cm3/mol
In the past few decades, a new interest has been exhibited in the synthesis of EuS, as well as its oxygen analog EuO, because of their potential use as laser window materials, insulating ferromagnets, ferromagnetic semiconductors, and magnetoresistant, optomagnetic, and luminescent materials.