Mg3Pt crystallizes in the hexagonal P6_3cm space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a distorted trigonal planar geometry to three equivalent Pt(1) atoms. In the second Mg site, Mg(2) is bonded in a trigonal planar geometry to three equivalent Pt(1) atoms. In the third Mg site, Mg(3) is bonded in a distorted trigonal planar geometry to three equivalent Pt(1) atoms. In the fourth Mg site, Mg(4) is bonded in a 2-coordinate geometry to two equivalent Pt(1) atoms. Pt(1) is bonded in a 8-coordinate geometry to one Mg(1), two equivalent Mg(2), two equivalent Mg(4), and three equivalent Mg(3) atoms.
Mg3Pt crystallizes in the hexagonal P6_3cm space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a distorted trigonal planar geometry to three equivalent Pt(1) atoms. All Mg(1)-Pt(1) bond lengths are 2.65 Å. In the second Mg site, Mg(2) is bonded in a trigonal planar geometry to three equivalent Pt(1) atoms. All Mg(2)-Pt(1) bond lengths are 2.68 Å. In the third Mg site, Mg(3) is bonded in a distorted trigonal planar geometry to three equivalent Pt(1) atoms. There is one shorter (2.76 Å) and two longer (2.82 Å) Mg(3)-Pt(1) bond lengths. In the fourth Mg site, Mg(4) is bonded in a 2-coordinate geometry to two equivalent Pt(1) atoms. There is one shorter (2.75 Å) and one longer (2.76 Å) Mg(4)-Pt(1) bond length. Pt(1) is bonded in a 8-coordinate geometry to one Mg(1), two equivalent Mg(2), two equivalent Mg(4), and three equivalent Mg(3) atoms.