MgGd2PtO6 crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent Pt(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-37°. Gd(1) is bonded in a 8-coordinate geometry to two equivalent O(1), three equivalent O(2), and three equivalent O(3) atoms. Pt(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form PtO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-37°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), two equivalent Gd(1), and one Pt(1) atom to form distorted corner-sharing OGd2MgPt trigonal pyramids. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Mg(1), three equivalent Gd(1), and one Pt(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Mg(1), three equivalent Gd(1), and one Pt(1) atom.
MgGd2PtO6 crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent Pt(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-37°. Both Mg(1)-O(1) bond lengths are 2.04 Å. Both Mg(1)-O(2) bond lengths are 2.07 Å. Both Mg(1)-O(3) bond lengths are 2.06 Å. Gd(1) is bonded in a 8-coordinate geometry to two equivalent O(1), three equivalent O(2), and three equivalent O(3) atoms. There is one shorter (2.28 Å) and one longer (2.34 Å) Gd(1)-O(1) bond length. There are a spread of Gd(1)-O(2) bond distances ranging from 2.33-2.72 Å. There are a spread of Gd(1)-O(3) bond distances ranging from 2.32-2.72 Å. Pt(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form PtO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-37°. Both Pt(1)-O(1) bond lengths are 2.02 Å. Both Pt(1)-O(2) bond lengths are 2.04 Å. Both Pt(1)-O(3) bond lengths are 2.03 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), two equivalent Gd(1), and one Pt(1) atom to form distorted corner-sharing OGd2MgPt trigonal pyramids. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Mg(1), three equivalent Gd(1), and one Pt(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Mg(1), three equivalent Gd(1), and one Pt(1) atom.