A new ferromagnetic ternary compound MnGaGe, isostructural with Mn 2Sb, has been prepared by quenching from the melt and subsequent solid-state reaction. The metallic MnGaGe is tetragonal with lattice constants a = 3.966±0.001 Å and c = 5.885±0.001 Å. Magnetic measurements show that the Curie temperature is 185°C and the saturation magnetization corresponds to 1.66μB/Mn atom at 4.2°K. The easy axis of magnetization coincides with the crystallographic c axis. The new material is thermally stable to 616°C at which temperature it melts peritectically. © 1973 American Institute of Physics.