Ce3Pt5Si crystallizes in the monoclinic C2 space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 11-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), two equivalent Pt(4), two equivalent Pt(5), and one Si(1) atom. In the second Ce site, Ce(2) is bonded in a 11-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), two equivalent Pt(4), two equivalent Pt(5), and one Si(1) atom. In the third Ce site, Ce(3) is bonded in a 11-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), two equivalent Pt(4), two equivalent Pt(5), and one Si(1) atom. There are five inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 11-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Ce(3), one Pt(1), one Pt(2), one Pt(4), one Pt(5), and one Si(1) atom. In the second Pt site, Pt(2) is bonded in a 11-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Ce(3), one Pt(1), one Pt(2), one Pt(3), one Pt(5), and one Si(1) atom. In the third Pt site, Pt(3) is bonded in a 11-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Ce(3), one Pt(2), one Pt(3), one Pt(4), one Pt(5), and one Si(1) atom. In the fourth Pt site, Pt(4) is bonded in a 11-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Ce(3), one Pt(1), one Pt(3), one Pt(4), one Pt(5), and one Si(1) atom. In the fifth Pt site, Pt(5) is bonded in a 2-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Ce(3), one Pt(1), one Pt(2), one Pt(3), one Pt(4), and two equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to one Ce(1), one Ce(2), one Ce(3), one Pt(1), one Pt(2), one Pt(3), one Pt(4), and two equivalent Pt(5) atoms.
Ce3Pt5Si crystallizes in the monoclinic C2 space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 11-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), two equivalent Pt(4), two equivalent Pt(5), and one Si(1) atom. There is one shorter (3.16 Å) and one longer (3.22 Å) Ce(1)-Pt(1) bond length. There is one shorter (3.16 Å) and one longer (3.22 Å) Ce(1)-Pt(2) bond length. There is one shorter (2.99 Å) and one longer (3.05 Å) Ce(1)-Pt(3) bond length. There is one shorter (2.99 Å) and one longer (3.05 Å) Ce(1)-Pt(4) bond length. There is one shorter (3.20 Å) and one longer (3.21 Å) Ce(1)-Pt(5) bond length. The Ce(1)-Si(1) bond length is 3.20 Å. In the second Ce site, Ce(2) is bonded in a 11-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), two equivalent Pt(4), two equivalent Pt(5), and one Si(1) atom. There is one shorter (2.94 Å) and one longer (3.34 Å) Ce(2)-Pt(1) bond length. There is one shorter (2.94 Å) and one longer (3.34 Å) Ce(2)-Pt(2) bond length. There is one shorter (2.92 Å) and one longer (3.34 Å) Ce(2)-Pt(3) bond length. There is one shorter (2.92 Å) and one longer (3.34 Å) Ce(2)-Pt(4) bond length. Both Ce(2)-Pt(5) bond lengths are 3.40 Å. The Ce(2)-Si(1) bond length is 3.05 Å. In the third Ce site, Ce(3) is bonded in a 11-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), two equivalent Pt(4), two equivalent Pt(5), and one Si(1) atom. There is one shorter (2.98 Å) and one longer (3.05 Å) Ce(3)-Pt(1) bond length. There is one shorter (2.99 Å) and one longer (3.05 Å) Ce(3)-Pt(2) bond length. There is one shorter (3.16 Å) and one longer (3.23 Å) Ce(3)-Pt(3) bond length. There is one shorter (3.15 Å) and one longer (3.22 Å) Ce(3)-Pt(4) bond length. There is one shorter (3.19 Å) and one longer (3.21 Å) Ce(3)-Pt(5) bond length. The Ce(3)-Si(1) bond length is 3.20 Å. There are five inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 11-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Ce(3), one Pt(1), one Pt(2), one Pt(4), one Pt(5), and one Si(1) atom. The Pt(1)-Pt(1) bond length is 2.91 Å. The Pt(1)-Pt(2) bond length is 2.96 Å. The Pt(1)-Pt(4) bond length is 2.93 Å. The Pt(1)-Pt(5) bond length is 3.03 Å. The Pt(1)-Si(1) bond length is 2.50 Å. In the second Pt site, Pt(2) is bonded in a 11-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Ce(3), one Pt(1), one Pt(2), one Pt(3), one Pt(5), and one Si(1) atom. The Pt(2)-Pt(2) bond length is 2.91 Å. The Pt(2)-Pt(3) bond length is 2.93 Å. The Pt(2)-Pt(5) bond length is 3.04 Å. The Pt(2)-Si(1) bond length is 2.50 Å. In the third Pt site, Pt(3) is bonded in a 11-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Ce(3), one Pt(2), one Pt(3), one Pt(4), one Pt(5), and one Si(1) atom. The Pt(3)-Pt(3) bond length is 2.92 Å. The Pt(3)-Pt(4) bond length is 2.96 Å. The Pt(3)-Pt(5) bond length is 3.04 Å. The Pt(3)-Si(1) bond length is 2.49 Å. In the fourth Pt site, Pt(4) is bonded in a 11-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Ce(3), one Pt(1), one Pt(3), one Pt(4), one Pt(5), and one Si(1) atom. The Pt(4)-Pt(4) bond length is 2.91 Å. The Pt(4)-Pt(5) bond length is 3.04 Å. The Pt(4)-Si(1) bond length is 2.50 Å. In the fifth Pt site, Pt(5) is bonded in a 2-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Ce(3), one Pt(1), one Pt(2), one Pt(3), one Pt(4), and two equivalent Si(1) atoms. Both Pt(5)-Si(1) bond lengths are 2.46 Å. Si(1) is bonded in a 9-coordinate geometry to one Ce(1), one Ce(2), one Ce(3), one Pt(1), one Pt(2), one Pt(3), one Pt(4), and two equivalent Pt(5) atoms.