The title compounds are prepared from the elements (1000-1100°C, 6-9 d) and characterized by powder XRD and magnetic measurements. RuMn2Sn and RuMn2Si crystallize with a Heusler-like cubic structure (space group F43m). RuMn2Sn shows ferrimagnetic behavior with a Curie temperature of 272.1 K and RuMn2Si exhibits spin-glass behavior with a freezing temperature of about 50 K. -(ENDO, K.; KANOMATA*, T.; NISHIHARA, H.; ZIEBECK, K. R. A.; J. Alloys Compd. 510 (2012) 1, 1-5, http://dx.