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All sourcesNASA NTRSDOE OSTI
DOE OSTI2019

Materials Data on YAlFe by Materials Project

AlFeY crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. there are two inequivalent Y sites. In the first Y site, Y is bonded in a 12-coordinate geometry to three equivalent Y, five Fe, and seven Al atoms. There are one shorter (3.27 Å) and two longer (3.29 Å) Y–Y bond lengths. There are a spread of Y–Fe bond distances ranging from 3.04–3.19 Å. There are a spread of Y–Al bond distances ranging from 3.13–3.17 Å. In the second Y site, Y is bonded in a 12-coordinate geometry to four Y, seven Fe, and five Al atoms. The Y–Y bond length is 3.09 Å. There are a spread of Y–Fe bond distances ranging from 3.07–3.20 Å. There are a spread of Y–Al bond distances ranging from 3.03–3.21 Å. There are three inequivalent Fe sites. In the first Fe site, Fe is bonded to six Y and six Al atoms to form FeY6Al6 cuboctahedra that share corners with four equivalent AlY6Al2Fe4 cuboctahedra, corners with fourteen FeY6Al6 cuboctahedra, edges with six FeY6Al6 cuboctahedra, faces with four equivalent FeY6Al2Fe4 cuboctahedra, and faces with fourteen AlY6Al2Fe4 cuboctahedra. There are a spread of Fe–Al bond distances ranging from 2.62–2.75 Å. In the second Fe site, Fe is bonded to six Y, four Fe, and two equivalent Al atoms to form distorted FeY6Al2Fe4 cuboctahedra that share corners with eight FeY6Al6 cuboctahedra, corners with ten AlY6Al2Fe4 cuboctahedra, edges with two equivalent FeY6Al2Fe4 cuboctahedra, edges with four equivalent AlY6Al4Fe2 cuboctahedra, faces with eight AlY6Al2Fe4 cuboctahedra, and faces with ten FeY6Al6 cuboctahedra. There are a spread of Fe–Fe bond distances ranging from 2.52–2.87 Å. Both Fe–Al bond lengths are 2.62 Å. In the third Fe site, Fe is bonded to six Y, four equivalent Fe, and two equivalent Al atoms to form distorted FeY6Al2Fe4 cuboctahedra that share corners with six FeY6Al6 cuboctahedra, corners with twelve AlY6Al2Fe4 cuboctahedra, edges with six FeY6Al6 cuboctahedra, faces with eight equivalent FeY6Al2Fe4 cuboctahedra, and faces with ten AlY6Al2Fe4 cuboctahedra. Both Fe–Al bond lengths are 2.63 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded to six Y, four Fe, and two equivalent Al atoms to form distorted AlY6Al2Fe4 cuboctahedra that share corners with four equivalent AlY6Al4Fe2 cuboctahedra, corners with eight FeY6Al6 cuboctahedra, edges with six equivalent AlY6Al2Fe4 cuboctahedra, faces with eight AlY6Al2Fe4 cuboctahedra, and faces with twelve FeY6Al6 cuboctahedra. Both Al–Al bond lengths are 2.81 Å. In the second Al site, Al is bonded to six Y, two equivalent Fe, and four Al atoms to form distorted AlY6Al4Fe2 cuboctahedra that share corners with eight AlY6Al2Fe4 cuboctahedra, corners with ten FeY6Al2Fe4 cuboctahedra, edges with two equivalent AlY6Al4Fe2 cuboctahedra, edges with four equivalent FeY6Al2Fe4 cuboctahedra, faces with eight FeY6Al6 cuboctahedra, and faces with ten AlY6Al2Fe4 cuboctahedra. There are one shorter (2.66 Å) and one longer (2.73 Å) Al–Al bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on YAlFe by Materials Project

AlFeY crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Y is bonded in a 12-coordinate geometry to six equivalent Fe and six equivalent Al atoms. There are two shorter (3.03 Å) and four longer (3.22 Å) Y–Fe bond lengths. There are four shorter (3.13 Å) and two longer (3.18 Å) Y–Al bond lengths. Fe is bonded to six equivalent Y, two equivalent Fe, and four equivalent Al atoms to form FeY6Al4Fe2 cuboctahedra that share corners with eight equivalent AlY6Al2Fe4 cuboctahedra, corners with ten equivalent FeY6Al4Fe2 cuboctahedra, edges with six equivalent FeY6Al4Fe2 cuboctahedra, faces with six equivalent FeY6Al4Fe2 cuboctahedra, and faces with twelve equivalent AlY6Al2Fe4 cuboctahedra. Both Fe–Fe bond lengths are 2.67 Å. All Fe–Al bond lengths are 2.67 Å. Al is bonded to six equivalent Y, four equivalent Fe, and two equivalent Al atoms to form AlY6Al2Fe4 cuboctahedra that share corners with eight equivalent FeY6Al4Fe2 cuboctahedra, corners with ten equivalent AlY6Al2Fe4 cuboctahedra, edges with six equivalent AlY6Al2Fe4 cuboctahedra, faces with six equivalent AlY6Al2Fe4 cuboctahedra, and faces with twelve equivalent FeY6Al4Fe2 cuboctahedra. Both Al–Al bond lengths are 2.75 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2019

Materials Data on YAlFe by Materials Project

AlFeY crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. there are two inequivalent Y sites. In the first Y site, Y is bonded in a 12-coordinate geometry to four Y, seven Fe, and five Al atoms. There are a spread of Y–Y bond distances ranging from 3.18–3.29 Å. There are a spread of Y–Fe bond distances ranging from 3.08–3.19 Å. There are three shorter (3.13 Å) and two longer (3.14 Å) Y–Al bond lengths. In the second Y site, Y is bonded in a 12-coordinate geometry to three equivalent Y, five Fe, and seven Al atoms. There are a spread of Y–Fe bond distances ranging from 3.04–3.27 Å. There are a spread of Y–Al bond distances ranging from 3.06–3.22 Å. There are two inequivalent Fe sites. In the first Fe site, Fe is bonded to six Y, two equivalent Fe, and four Al atoms to form distorted FeY6Al4Fe2 cuboctahedra that share corners with four equivalent FeY6Al2Fe4 cuboctahedra, corners with eight AlY6Fe6 cuboctahedra, edges with six equivalent FeY6Al4Fe2 cuboctahedra, faces with eight FeY6Al4Fe2 cuboctahedra, and faces with twelve AlY6Fe6 cuboctahedra. Both Fe–Fe bond lengths are 2.52 Å. There are a spread of Fe–Al bond distances ranging from 2.59–2.74 Å. In the second Fe site, Fe is bonded to six Y, four Fe, and two equivalent Al atoms to form FeY6Al2Fe4 cuboctahedra that share corners with eight FeY6Al4Fe2 cuboctahedra, corners with ten AlY6Al4Fe2 cuboctahedra, edges with two equivalent FeY6Al2Fe4 cuboctahedra, edges with four equivalent AlY6Al4Fe2 cuboctahedra, faces with eight AlY6Fe6 cuboctahedra, and faces with ten FeY6Al4Fe2 cuboctahedra. There are one shorter (2.64 Å) and one longer (2.76 Å) Fe–Fe bond lengths. There are one shorter (2.62 Å) and one longer (2.78 Å) Fe–Al bond lengths. There are three inequivalent Al sites. In the first Al site, Al is bonded to six Y and six Fe atoms to form AlY6Fe6 cuboctahedra that share corners with four equivalent FeY6Al4Fe2 cuboctahedra, corners with fourteen AlY6Fe6 cuboctahedra, edges with six AlY6Fe6 cuboctahedra, faces with four equivalent AlY6Al4Fe2 cuboctahedra, and faces with fourteen FeY6Al4Fe2 cuboctahedra. In the second Al site, Al is bonded to six Y, two equivalent Fe, and four Al atoms to form AlY6Al4Fe2 cuboctahedra that share corners with eight AlY6Fe6 cuboctahedra, corners with ten FeY6Al4Fe2 cuboctahedra, edges with two equivalent AlY6Al4Fe2 cuboctahedra, edges with four equivalent FeY6Al2Fe4 cuboctahedra, faces with eight FeY6Al4Fe2 cuboctahedra, and faces with ten AlY6Fe6 cuboctahedra. There are a spread of Al–Al bond distances ranging from 2.63–2.76 Å. In the third Al site, Al is bonded to six Y, two equivalent Fe, and four equivalent Al atoms to form AlY6Al4Fe2 cuboctahedra that share corners with six AlY6Fe6 cuboctahedra, corners with twelve FeY6Al4Fe2 cuboctahedra, edges with six AlY6Fe6 cuboctahedra, faces with eight equivalent AlY6Al4Fe2 cuboctahedra, and faces with ten FeY6Al4Fe2 cuboctahedra.

36 MATERIALS SCIENCE↗