Phase-pure samples of the antimonides PrPdSb and NdPdSb were prepared by arc-melting pieces of the elements and subsequent annealing. The samples were investigated by powder and single crystal X-ray diffraction: NdPtSb type, space group P 6 3 mc , a = 458.70(5), c = 780.55(6) pm, wR 2 = 0.0272, 244 F 2 values, 11 variable parameters for PrPdSb and a = 458.18(4), c = 771.25(6) pm, wR 2 = 0.0317, 229 F 2 values, 11 variable parameters for NdPdSb. The palladium and antimony atoms form slightly puckered Pd 3 Sb 3 hexagons which are rotated by 60° in every other layer. The rare earth ( RE ) atoms are coordinated by two Pd 3 Sb 3 hexagons with the RE –Pd shorter than the RE –Sb contacts. The 121 Sb Mössbauer spectra at T = 5 K confirm the antimonide character with isomer shifts of −7.55 (PrPdSb) and −7.47 mm · s −1 (NdPdSb). In agreement with the crystal structures, each spectrum could be fitted with one quadrupole split signal.