MgNb2PdS6 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form distorted edge-sharing MgS6 octahedra. Nb(1) is bonded in a 7-coordinate geometry to two equivalent S(1), two equivalent S(3), and three equivalent S(2) atoms. Pd(1) is bonded in a square co-planar geometry to two equivalent S(1) and two equivalent S(3) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded in a distorted see-saw-like geometry to one Mg(1), two equivalent Nb(1), and one Pd(1) atom. In the second S site, S(2) is bonded to two equivalent Mg(1) and three equivalent Nb(1) atoms to form a mixture of distorted edge and corner-sharing SMg2Nb3 trigonal bipyramids. In the third S site, S(3) is bonded in a distorted T-shaped geometry to two equivalent Nb(1) and one Pd(1) atom.
MgNb2PdS6 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form distorted edge-sharing MgS6 octahedra. Both Mg(1)-S(1) bond lengths are 2.63 Å. All Mg(1)-S(2) bond lengths are 2.57 Å. Nb(1) is bonded in a 7-coordinate geometry to two equivalent S(1), two equivalent S(3), and three equivalent S(2) atoms. Both Nb(1)-S(1) bond lengths are 2.50 Å. Both Nb(1)-S(3) bond lengths are 2.47 Å. There are two shorter (2.63 Å) and one longer (2.66 Å) Nb(1)-S(2) bond length. Pd(1) is bonded in a square co-planar geometry to two equivalent S(1) and two equivalent S(3) atoms. Both Pd(1)-S(1) bond lengths are 2.41 Å. Both Pd(1)-S(3) bond lengths are 2.38 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded in a distorted see-saw-like geometry to one Mg(1), two equivalent Nb(1), and one Pd(1) atom. In the second S site, S(2) is bonded to two equivalent Mg(1) and three equivalent Nb(1) atoms to form a mixture of distorted edge and corner-sharing SMg2Nb3 trigonal bipyramids. In the third S site, S(3) is bonded in a distorted T-shaped geometry to two equivalent Nb(1) and one Pd(1) atom.