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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Mg3Al by Materials Project

AlMg3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Mg is bonded to eight equivalent Mg and four equivalent Al atoms to form MgMg8Al4 cuboctahedra that share corners with twelve equivalent MgMg8Al4 cuboctahedra, edges with eight equivalent AlMg12 cuboctahedra, edges with sixteen equivalent MgMg8Al4 cuboctahedra, faces with four equivalent AlMg12 cuboctahedra, and faces with fourteen equivalent MgMg8Al4 cuboctahedra. All Mg–Mg bond lengths are 3.09 Å. All Mg–Al bond lengths are 3.09 Å. Al is bonded to twelve equivalent Mg atoms to form AlMg12 cuboctahedra that share corners with twelve equivalent AlMg12 cuboctahedra, edges with twenty-four equivalent MgMg8Al4 cuboctahedra, faces with six equivalent AlMg12 cuboctahedra, and faces with twelve equivalent MgMg8Al4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg3Al by Materials Project

AlMg3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Mg sites. In the first Mg site, Mg is bonded to eight equivalent Mg and four equivalent Al atoms to form MgMg8Al4 cuboctahedra that share corners with four equivalent MgMg8Al4 cuboctahedra, corners with eight equivalent AlMg12 cuboctahedra, edges with twenty-four MgMg8Al4 cuboctahedra, faces with six equivalent AlMg12 cuboctahedra, and faces with twelve MgMg8Al4 cuboctahedra. All Mg–Mg bond lengths are 3.10 Å. All Mg–Al bond lengths are 3.10 Å. In the second Mg site, Mg is bonded to eight Mg and four equivalent Al atoms to form MgMg8Al4 cuboctahedra that share corners with twelve equivalent MgMg8Al4 cuboctahedra, edges with eight equivalent AlMg12 cuboctahedra, edges with sixteen MgMg8Al4 cuboctahedra, faces with four equivalent AlMg12 cuboctahedra, and faces with fourteen MgMg8Al4 cuboctahedra. All Mg–Mg bond lengths are 3.10 Å. All Mg–Al bond lengths are 3.10 Å. Al is bonded to twelve Mg atoms to form AlMg12 cuboctahedra that share corners with four equivalent AlMg12 cuboctahedra, corners with eight equivalent MgMg8Al4 cuboctahedra, edges with eight equivalent AlMg12 cuboctahedra, edges with sixteen equivalent MgMg8Al4 cuboctahedra, faces with four equivalent AlMg12 cuboctahedra, and faces with fourteen MgMg8Al4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg3Al by Materials Project

AlMg3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent Mg sites. In the first Mg site, Mg is bonded in a body-centered cubic geometry to eight equivalent Mg atoms. All Mg–Mg bond lengths are 3.00 Å. In the second Mg site, Mg is bonded in a distorted body-centered cubic geometry to four equivalent Mg and four equivalent Al atoms. All Mg–Al bond lengths are 3.00 Å. Al is bonded in a body-centered cubic geometry to eight equivalent Mg atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg3Al by Materials Project

AlMg3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Mg is bonded to eight equivalent Mg and four equivalent Al atoms to form MgMg8Al4 cuboctahedra that share corners with four equivalent AlMg12 cuboctahedra, corners with fourteen equivalent MgMg8Al4 cuboctahedra, edges with six equivalent AlMg12 cuboctahedra, edges with twelve equivalent MgMg8Al4 cuboctahedra, faces with four equivalent AlMg12 cuboctahedra, and faces with sixteen equivalent MgMg8Al4 cuboctahedra. There are a spread of Mg–Mg bond distances ranging from 3.04–3.12 Å. There are two shorter (3.08 Å) and two longer (3.09 Å) Mg–Al bond lengths. Al is bonded to twelve equivalent Mg atoms to form AlMg12 cuboctahedra that share corners with six equivalent AlMg12 cuboctahedra, corners with twelve equivalent MgMg8Al4 cuboctahedra, edges with eighteen equivalent MgMg8Al4 cuboctahedra, faces with eight equivalent AlMg12 cuboctahedra, and faces with twelve equivalent MgMg8Al4 cuboctahedra.

36 MATERIALS SCIENCE↗