X-ray powder data for YbCu 2 Ge 2 , YbAg 2 Si 2 and YbAg 2 Ge 2 confirmed the atom order of the ThCr 2 Si 2 type (ordered BaAl 4 type) as reported earlier. YbCu 2 Ge 2 is an intermediate valence system with the Yb ions valence close to +2 at low temperatures, whereas the other two compounds are weakly temperature-dependent paramagnets. All these ternaries show metallic character of their electrical conductivity. The structure of Yb(Cu 1−x Zn x ) 2 Si 2 (x=0.65, 0.77) was found to correspond to the BaAl 4 type, assuming a random distribution of Cu and Zn atoms over the positions 4d (0, 1/2, 1/4). The Si atoms were found in the sites 4e (0, 0, z). These two pseudoternary compounds are diamagnetic. A novel phase with the composition Yb(Ag 0.18 Si 0.82 ) 2 crystallizes in the ThSi 2 -type on the verge to a symmetry reduction towards orthorhombic GdSi 2 -type. This phase is a Pauli paramagnet and exhibits metallic behavior of the resistivity.