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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Al9Rh2 by Materials Project

Al9Rh2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Rh is bonded in a 9-coordinate geometry to nine Al atoms. There are a spread of Rh–Al bond distances ranging from 2.46–2.61 Å. There are five inequivalent Al sites. In the first Al site, Al is bonded in a linear geometry to two equivalent Rh atoms. In the second Al site, Al is bonded in a 2-coordinate geometry to two equivalent Rh atoms. In the third Al site, Al is bonded in a 2-coordinate geometry to two equivalent Rh atoms. In the fourth Al site, Al is bonded in a distorted bent 120 degrees geometry to two equivalent Rh atoms. In the fifth Al site, Al is bonded in a distorted bent 150 degrees geometry to two equivalent Rh atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Al5Rh2 by Materials Project

Al5Rh2 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent Rh sites. In the first Rh site, Rh is bonded in a 9-coordinate geometry to nine Al atoms. There are six shorter (2.46 Å) and three longer (2.69 Å) Rh–Al bond lengths. In the second Rh site, Rh is bonded in a 10-coordinate geometry to ten Al atoms. There are a spread of Rh–Al bond distances ranging from 2.48–2.79 Å. There are three inequivalent Al sites. In the first Al site, Al is bonded to six equivalent Rh atoms to form distorted face-sharing AlRh6 cuboctahedra. In the second Al site, Al is bonded in a 3-coordinate geometry to three Rh atoms. In the third Al site, Al is bonded in a 2-coordinate geometry to four Rh atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on AlRh by Materials Project

AlRh is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Rh is bonded in a body-centered cubic geometry to eight equivalent Al atoms. All Rh–Al bond lengths are 2.60 Å. Al is bonded in a body-centered cubic geometry to eight equivalent Rh atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on AlRh3 by Materials Project

Rh3Al is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Rh is bonded to eight equivalent Rh and four equivalent Al atoms to form distorted RhAl4Rh8 cuboctahedra that share corners with four equivalent AlRh12 cuboctahedra, corners with fourteen equivalent RhAl4Rh8 cuboctahedra, edges with six equivalent AlRh12 cuboctahedra, edges with twelve equivalent RhAl4Rh8 cuboctahedra, faces with four equivalent AlRh12 cuboctahedra, and faces with sixteen equivalent RhAl4Rh8 cuboctahedra. There are a spread of Rh–Rh bond distances ranging from 2.70–2.75 Å. There are two shorter (2.69 Å) and two longer (2.73 Å) Rh–Al bond lengths. Al is bonded to twelve equivalent Rh atoms to form AlRh12 cuboctahedra that share corners with six equivalent AlRh12 cuboctahedra, corners with twelve equivalent RhAl4Rh8 cuboctahedra, edges with eighteen equivalent RhAl4Rh8 cuboctahedra, faces with eight equivalent AlRh12 cuboctahedra, and faces with twelve equivalent RhAl4Rh8 cuboctahedra.

36 MATERIALS SCIENCE↗