Materials Data on MgCd by Materials Project
MgCd crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. there are three inequivalent Mg sites. In the first Mg site, Mg is bonded to four Mg and eight Cd atoms to form distorted MgMg4Cd8 cuboctahedra that share corners with ten CdMg8 cuboctahedra, corners with twelve MgMg4Cd8 cuboctahedra, edges with five CdMg8 cuboctahedra, edges with eleven MgMg6Cd6 cuboctahedra, faces with six equivalent CdMg8Cd4 cuboctahedra, and faces with eight MgMg4Cd8 cuboctahedra. There are two shorter (3.18 Å) and two longer (3.26 Å) Mg–Mg bond lengths. There are a spread of Mg–Cd bond distances ranging from 3.08–3.15 Å. In the second Mg site, Mg is bonded to six Mg and six Cd atoms to form distorted MgMg6Cd6 cuboctahedra that share corners with twelve MgMg4Cd8 cuboctahedra, corners with twelve CdMg8 cuboctahedra, edges with three equivalent MgMg4Cd8 cuboctahedra, edges with nine CdMg8Cd4 cuboctahedra, faces with eight CdMg8 cuboctahedra, and faces with twelve MgMg4Cd8 cuboctahedra. There are two shorter (3.12 Å) and two longer (3.26 Å) Mg–Mg bond lengths. There are four shorter (3.08 Å) and two longer (3.11 Å) Mg–Cd bond lengths. In the third Mg site, Mg is bonded to four Mg and eight Cd atoms to form distorted MgMg4Cd8 cuboctahedra that share corners with six equivalent MgMg4Cd8 cuboctahedra, corners with sixteen CdMg8Cd4 cuboctahedra, edges with eight equivalent MgMg4Cd8 cuboctahedra, edges with eight CdMg8Cd4 cuboctahedra, faces with two equivalent CdMg8Cd4 cuboctahedra, and faces with twelve MgMg4Cd8 cuboctahedra. Both Mg–Mg bond lengths are 3.26 Å. There are a spread of Mg–Cd bond distances ranging from 3.07–3.15 Å. There are three inequivalent Cd sites. In the first Cd site, Cd is bonded to eight Mg atoms to form distorted CdMg8 cuboctahedra that share corners with eight CdMg8 cuboctahedra, corners with eighteen MgMg4Cd8 cuboctahedra, edges with six MgMg4Cd8 cuboctahedra, edges with ten CdMg8 cuboctahedra, faces with two equivalent MgMg6Cd6 cuboctahedra, and faces with six CdMg8Cd4 cuboctahedra. In the second Cd site, Cd is bonded to six Mg and two equivalent Cd atoms to form distorted CdMg6Cd2 cuboctahedra that share corners with twelve CdMg6Cd2 cuboctahedra, corners with fourteen MgMg4Cd8 cuboctahedra, edges with seven CdMg8 cuboctahedra, edges with nine MgMg4Cd8 cuboctahedra, faces with two equivalent MgMg6Cd6 cuboctahedra, and faces with six CdMg8Cd4 cuboctahedra. Both Cd–Cd bond lengths are 3.16 Å. In the third Cd site, Cd is bonded to eight Mg and four Cd atoms to form distorted CdMg8Cd4 cuboctahedra that share corners with six equivalent MgMg4Cd8 cuboctahedra, corners with eighteen CdMg8Cd4 cuboctahedra, edges with five CdMg8 cuboctahedra, edges with seven MgMg6Cd6 cuboctahedra, faces with eight CdMg8 cuboctahedra, and faces with twelve MgMg4Cd8 cuboctahedra. Both Cd–Cd bond lengths are 3.26 Å.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). LBNL Materials Project
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Contributing Organization:
- MIT; UC Berkeley; Duke; U Louvain
- DOE Contract Number:
- AC02-05CH11231; EDCBEE
- OSTI ID:
- 1315889
- Report Number(s):
- mp-978274
- Resource Relation:
- Related Information: https://materialsproject.org/citing
- Country of Publication:
- United States
- Language:
- English
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Materials Data on Mg2Cd by Materials Project
Materials Data on Mg2Cd by Materials Project