NdPtSi is hexagonal omega structure-derived structured and crystallizes in the tetragonal I4_1md space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded to six equivalent Pt(1) and six equivalent Si(1) atoms to form a mixture of edge and face-sharing NdSi6Pt6 cuboctahedra. In the second Nd site, Nd(1) is bonded to six equivalent Pt(1) and six equivalent Si(1) atoms to form a mixture of edge and face-sharing NdSi6Pt6 cuboctahedra. In the third Nd site, Nd(1) is bonded to six equivalent Pt(1) and six equivalent Si(1) atoms to form a mixture of edge and face-sharing NdSi6Pt6 cuboctahedra. Pt(1) is bonded in a 9-coordinate geometry to six Nd(1,1) and three equivalent Si(1) atoms. Si(1) is bonded in a distorted trigonal planar geometry to six Nd(1,1) and three equivalent Pt(1) atoms.
NdPtSi is hexagonal omega structure-derived structured and crystallizes in the tetragonal I4_1md space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded to six equivalent Pt(1) and six equivalent Si(1) atoms to form a mixture of edge and face-sharing NdSi6Pt6 cuboctahedra. There are two shorter (3.15 Å) and four longer (3.24 Å) Nd(1)-Pt(1) bond lengths. There are four shorter (3.20 Å) and two longer (3.23 Å) Nd(1)-Si(1) bond lengths. In the second Nd site, Nd(1) is bonded to six equivalent Pt(1) and six equivalent Si(1) atoms to form a mixture of edge and face-sharing NdSi6Pt6 cuboctahedra. There are two shorter (3.15 Å) and four longer (3.24 Å) Nd(1)-Pt(1) bond lengths. There are four shorter (3.20 Å) and two longer (3.23 Å) Nd(1)-Si(1) bond lengths. In the third Nd site, Nd(1) is bonded to six equivalent Pt(1) and six equivalent Si(1) atoms to form a mixture of edge and face-sharing NdSi6Pt6 cuboctahedra. There are two shorter (3.15 Å) and four longer (3.24 Å) Nd(1)-Pt(1) bond lengths. There are four shorter (3.20 Å) and two longer (3.23 Å) Nd(1)-Si(1) bond lengths. Pt(1) is bonded in a 9-coordinate geometry to six Nd(1,1) and three equivalent Si(1) atoms. There are two shorter (2.41 Å) and one longer (2.43 Å) Pt(1)-Si(1) bond length. Si(1) is bonded in a distorted trigonal planar geometry to six Nd(1,1) and three equivalent Pt(1) atoms.