MgCePt crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 4-coordinate geometry to two equivalent Pt(1) and two equivalent Pt(2) atoms. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to two equivalent Pt(1) and two equivalent Pt(2) atoms. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 5-coordinate geometry to one Pt(2) and four equivalent Pt(1) atoms. In the second Ce site, Ce(2) is bonded in a 5-coordinate geometry to one Pt(2) and four equivalent Pt(1) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 9-coordinate geometry to one Mg(1), two equivalent Mg(2), two equivalent Ce(2), and four equivalent Ce(1) atoms. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to two equivalent Mg(1), four equivalent Mg(2), one Ce(2), and two equivalent Ce(1) atoms.
MgCePt crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 4-coordinate geometry to two equivalent Pt(1) and two equivalent Pt(2) atoms. Both Mg(1)-Pt(1) bond lengths are 2.95 Å. Both Mg(1)-Pt(2) bond lengths are 2.74 Å. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to two equivalent Pt(1) and two equivalent Pt(2) atoms. There is one shorter (2.95 Å) and one longer (2.96 Å) Mg(2)-Pt(1) bond length. Both Mg(2)-Pt(2) bond lengths are 2.73 Å. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 5-coordinate geometry to one Pt(2) and four equivalent Pt(1) atoms. The Ce(1)-Pt(2) bond length is 3.15 Å. There are two shorter (3.07 Å) and two longer (3.08 Å) Ce(1)-Pt(1) bond lengths. In the second Ce site, Ce(2) is bonded in a 5-coordinate geometry to one Pt(2) and four equivalent Pt(1) atoms. The Ce(2)-Pt(2) bond length is 3.13 Å. All Ce(2)-Pt(1) bond lengths are 3.07 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 9-coordinate geometry to one Mg(1), two equivalent Mg(2), two equivalent Ce(2), and four equivalent Ce(1) atoms. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to two equivalent Mg(1), four equivalent Mg(2), one Ce(2), and two equivalent Ce(1) atoms.