MgCrPtO2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 6-coordinate geometry to three equivalent Pt(1) and three equivalent O(2) atoms. Cr(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form edge-sharing CrO6 octahedra. Pt(1) is bonded in a 4-coordinate geometry to three equivalent Mg(1) and one O(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Cr(1) and one Pt(1) atom to form distorted OCr3Pt tetrahedra that share corners with three equivalent O(2)Mg3Cr3 pentagonal pyramids, corners with six equivalent O(1)Cr3Pt tetrahedra, and edges with three equivalent O(2)Mg3Cr3 pentagonal pyramids. In the second O site, O(2) is bonded to three equivalent Mg(1) and three equivalent Cr(1) atoms to form distorted OMg3Cr3 pentagonal pyramids that share corners with three equivalent O(1)Cr3Pt tetrahedra, edges with six equivalent O(2)Mg3Cr3 pentagonal pyramids, and edges with three equivalent O(1)Cr3Pt tetrahedra.
MgCrPtO2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 6-coordinate geometry to three equivalent Pt(1) and three equivalent O(2) atoms. There are two shorter (2.63 Å) and one longer (2.64 Å) Mg(1)-Pt(1) bond length. There are a spread of Mg(1)-O(2) bond distances ranging from 2.20-2.28 Å. Cr(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form edge-sharing CrO6 octahedra. All Cr(1)-O(1) bond lengths are 1.95 Å. There are two shorter (2.14 Å) and one longer (2.15 Å) Cr(1)-O(2) bond length. Pt(1) is bonded in a 4-coordinate geometry to three equivalent Mg(1) and one O(1) atom. The Pt(1)-O(1) bond length is 2.51 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Cr(1) and one Pt(1) atom to form distorted OCr3Pt tetrahedra that share corners with three equivalent O(2)Mg3Cr3 pentagonal pyramids, corners with six equivalent O(1)Cr3Pt tetrahedra, and edges with three equivalent O(2)Mg3Cr3 pentagonal pyramids. In the second O site, O(2) is bonded to three equivalent Mg(1) and three equivalent Cr(1) atoms to form distorted OMg3Cr3 pentagonal pyramids that share corners with three equivalent O(1)Cr3Pt tetrahedra, edges with six equivalent O(2)Mg3Cr3 pentagonal pyramids, and edges with three equivalent O(1)Cr3Pt tetrahedra.