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The ternary Laves phases Sr 2 Pd 3 Sn, Eu 2 Pd 3 Sn and Eu 2 Pd 3 In were synthesized by induction melting of the elements in sealed tantalum ampoules. The polycrystalline products were characterized through their powder X-ray diffraction patterns. The structure of Eu 2 Pd 3 Sn was refined from single crystal X-ray diffractometer data: Mg 2 MnGa 3  type,  Cmcm ,  a  = 583.36(5),  b  = 908.31(7),  c  = 958.06(8) pm, w R 2 = 0.0366, 557  F  2  values, 23 variables. The palladium and tin atoms show the inverse coloring on the network of condensed tetrahedra of Mg 2 MnGa 3 , i.e., MnGa 3  versus Pd 3 Sn. Refinement of the occupancy parameters revealed small defects for the europium site, leading to composition Eu 1.962(6) Pd 3 Sn for the studied crystal. Sr 2 Pd 3 Sn is a Pauli paramagnet and Eu 2 Pd 3 Sn shows Curie-Weiss paramagnetism (7.86(1) µ B  Eu atom −1  and  Θ  P  = 48.1(1) K). Ferromagnetic ordering is observed below  T  C  = 46.1(1) K. The  119 Sn and  151 Eu Mössbauer spectra of Sr 2 Pd 3 Sn and Eu 2 Pd 3 Sn are discussed with respect to electron density changes as a function of the tin content and the ionicity in the sequence of the stannides Sr 2 Pd 3 Sn/Eu 2 Pd 3 Sn → Sr 2 Pd 2 Sn/Eu 2 Pd 2 Sn → EuPdSn → EuPdSn 2 .

Ternary orthorhombic Laves phases Sr 2 Pd 3 Sn, Eu 2 Pd 3 Sn and Eu 2 Pd 3 In