CePtSi is hexagonal omega structure-derived structured and crystallizes in the tetragonal I4_1md space group. Ce(1) is bonded to six Pt(1,1) and six equivalent Si(1) atoms to form a mixture of face and edge-sharing CeSi6Pt6 cuboctahedra. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 9-coordinate geometry to six equivalent Ce(1) and three equivalent Si(1) atoms. In the second Pt site, Pt(1) is bonded in a 9-coordinate geometry to six equivalent Ce(1) and three equivalent Si(1) atoms. In the third Pt site, Pt(1) is bonded in a 9-coordinate geometry to six equivalent Ce(1) and three equivalent Si(1) atoms. In the fourth Pt site, Pt(1) is bonded in a 9-coordinate geometry to six equivalent Ce(1) and three equivalent Si(1) atoms. Si(1) is bonded in a distorted trigonal planar geometry to six equivalent Ce(1) and three Pt(1,1) atoms.
CePtSi is hexagonal omega structure-derived structured and crystallizes in the tetragonal I4_1md space group. Ce(1) is bonded to six Pt(1,1) and six equivalent Si(1) atoms to form a mixture of face and edge-sharing CeSi6Pt6 cuboctahedra. There are two shorter (3.17 Å) and four longer (3.21 Å) Ce(1)-Pt(1,1) bond lengths. There are four shorter (3.18 Å) and two longer (3.24 Å) Ce(1)-Si(1) bond lengths. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 9-coordinate geometry to six equivalent Ce(1) and three equivalent Si(1) atoms. There are two shorter (2.41 Å) and one longer (2.44 Å) Pt(1)-Si(1) bond length. In the second Pt site, Pt(1) is bonded in a 9-coordinate geometry to six equivalent Ce(1) and three equivalent Si(1) atoms. There are two shorter (2.41 Å) and one longer (2.44 Å) Pt(1)-Si(1) bond length. In the third Pt site, Pt(1) is bonded in a 9-coordinate geometry to six equivalent Ce(1) and three equivalent Si(1) atoms. There are two shorter (3.17 Å) and four longer (3.21 Å) Pt(1)-Ce(1) bond lengths. There are two shorter (2.41 Å) and one longer (2.44 Å) Pt(1)-Si(1) bond length. In the fourth Pt site, Pt(1) is bonded in a 9-coordinate geometry to six equivalent Ce(1) and three equivalent Si(1) atoms. There are two shorter (3.17 Å) and four longer (3.21 Å) Pt(1)-Ce(1) bond lengths. There are two shorter (2.41 Å) and one longer (2.44 Å) Pt(1)-Si(1) bond length. Si(1) is bonded in a distorted trigonal planar geometry to six equivalent Ce(1) and three Pt(1,1) atoms.