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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Al2B2Ru3 by Materials Project

Ru3Al2B2 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. there are two inequivalent Ru sites. In the first Ru site, Ru is bonded in a 10-coordinate geometry to four equivalent Al and six equivalent B atoms. All Ru–Al bond lengths are 2.72 Å. There are four shorter (2.28 Å) and two longer (2.35 Å) Ru–B bond lengths. In the second Ru site, Ru is bonded in a body-centered cubic geometry to eight equivalent Al atoms. All Ru–Al bond lengths are 2.54 Å. Al is bonded in a 9-coordinate geometry to eight Ru and one B atom. The Al–B bond length is 2.55 Å. B is bonded in a 9-coordinate geometry to six equivalent Ru, one Al, and two equivalent B atoms. Both B–B bond lengths are 1.81 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Al3(BRu2)2 by Materials Project

Ru4Al3B2 crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. there are two inequivalent Ru sites. In the first Ru site, Ru is bonded in a body-centered cubic geometry to six Al and two equivalent B atoms. There are four shorter (2.56 Å) and two longer (2.59 Å) Ru–Al bond lengths. Both Ru–B bond lengths are 2.16 Å. In the second Ru site, Ru is bonded in a 10-coordinate geometry to six Al and four equivalent B atoms. There are two shorter (2.64 Å) and four longer (2.87 Å) Ru–Al bond lengths. All Ru–B bond lengths are 2.28 Å. There are three inequivalent Al sites. In the first Al site, Al is bonded in a body-centered cubic geometry to eight equivalent Ru atoms. In the second Al site, Al is bonded to eight equivalent Ru and four equivalent B atoms to form distorted face-sharing AlB4Ru8 cuboctahedra. All Al–B bond lengths are 2.34 Å. In the third Al site, Al is bonded in a 11-coordinate geometry to eight Ru, one Al, and two equivalent B atoms. The Al–Al bond length is 2.62 Å. Both Al–B bond lengths are 2.65 Å. B is bonded in a 7-coordinate geometry to six Ru and three Al atoms.

36 MATERIALS SCIENCE↗