Materials Data on Mg14CdCu by Materials Project
Mg14CuCd crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. there are five inequivalent Mg sites. In the first Mg site, Mg is bonded to ten Mg and two equivalent Cu atoms to form distorted MgMg10Cu2 cuboctahedra that share corners with four equivalent CdMg12 cuboctahedra, corners with fourteen MgMg10Cu2 cuboctahedra, edges with two equivalent CuMg12 cuboctahedra, edges with sixteen MgMg10Cu2 cuboctahedra, faces with two equivalent CuMg12 cuboctahedra, and faces with eighteen MgMg10Cu2 cuboctahedra. There are a spread of Mg–Mg bond distances ranging from 3.09–3.17 Å. Both Mg–Cu bond lengths are 3.14 Å. In the second Mg site, Mg is bonded to ten Mg and two equivalent Cd atoms to form distorted MgMg10Cd2 cuboctahedra that share corners with four equivalent CuMg12 cuboctahedra, corners with fourteen MgMg10Cu2 cuboctahedra, edges with two equivalent CdMg12 cuboctahedra, edges with sixteen MgMg10Cd2 cuboctahedra, faces with two equivalent CdMg12 cuboctahedra, and faces with eighteen MgMg10Cu2 cuboctahedra. There are a spread of Mg–Mg bond distances ranging from 3.11–3.18 Å. Both Mg–Cd bond lengths are 3.14 Å. In the third Mg site, Mg is bonded to ten Mg, one Cu, and one Cd atom to form distorted MgMg10CdCu cuboctahedra that share corners with eighteen MgMg10CdCu cuboctahedra, edges with two equivalent CuMg12 cuboctahedra, edges with two equivalent CdMg12 cuboctahedra, edges with fourteen MgMg10Cu2 cuboctahedra, a faceface with one CuMg12 cuboctahedra, a faceface with one CdMg12 cuboctahedra, and faces with eighteen MgMg10Cu2 cuboctahedra. There are a spread of Mg–Mg bond distances ranging from 3.08–3.20 Å. The Mg–Cu bond length is 3.05 Å. The Mg–Cd bond length is 3.15 Å. In the fourth Mg site, Mg is bonded to ten Mg, one Cu, and one Cd atom to form distorted MgMg10CdCu cuboctahedra that share corners with eighteen MgMg10CdCu cuboctahedra, edges with two equivalent CuMg12 cuboctahedra, edges with two equivalent CdMg12 cuboctahedra, edges with fourteen MgMg10Cu2 cuboctahedra, a faceface with one CuMg12 cuboctahedra, a faceface with one CdMg12 cuboctahedra, and faces with eighteen MgMg10Cu2 cuboctahedra. There are a spread of Mg–Mg bond distances ranging from 3.09–3.18 Å. The Mg–Cu bond length is 3.05 Å. The Mg–Cd bond length is 3.15 Å. In the fifth Mg site, Mg is bonded to twelve Mg atoms to form MgMg12 cuboctahedra that share corners with eighteen MgMg10CdCu cuboctahedra, edges with eighteen MgMg10Cu2 cuboctahedra, faces with three equivalent CuMg12 cuboctahedra, faces with three equivalent CdMg12 cuboctahedra, and faces with fourteen MgMg10Cu2 cuboctahedra. Cu is bonded to twelve Mg atoms to form CuMg12 cuboctahedra that share corners with six equivalent CuMg12 cuboctahedra, corners with twelve equivalent MgMg10Cd2 cuboctahedra, edges with eighteen MgMg10Cu2 cuboctahedra, faces with two equivalent CdMg12 cuboctahedra, and faces with eighteen MgMg10Cu2 cuboctahedra. Cd is bonded to twelve Mg atoms to form CdMg12 cuboctahedra that share corners with six equivalent CdMg12 cuboctahedra, corners with twelve equivalent MgMg10Cu2 cuboctahedra, edges with eighteen MgMg10Cd2 cuboctahedra, faces with two equivalent CuMg12 cuboctahedra, and faces with eighteen MgMg10Cd2 cuboctahedra.