SEARCH · Engineering Papers
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Be3Rh is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Be is bonded in a 4-coordinate geometry to four equivalent Rh atoms. There are two shorter (2.37 Å) and two longer (2.42 Å) Be–Rh bond lengths. Rh is bonded to twelve equivalent Be atoms to form a mixture of face and corner-sharing RhBe12 cuboctahedra.
Be3Rh is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Be sites. In the first Be site, Be is bonded to eight Be and four equivalent Rh atoms to form distorted BeBe8Rh4 cuboctahedra that share corners with twelve equivalent BeBe8Rh4 cuboctahedra, edges with eight equivalent BeBe8Rh4 cuboctahedra, edges with eight equivalent RhBe12 cuboctahedra, faces with four equivalent RhBe12 cuboctahedra, and faces with ten equivalent BeBe8Rh4 cuboctahedra. There are four shorter (2.30 Å) and four longer (2.44 Å) Be–Be bond lengths. All Be–Rh bond lengths are 2.44 Å. In the second Be site, Be is bonded in a square co-planar geometry to eight equivalent Be and four equivalent Rh atoms. All Be–Rh bond lengths are 2.30 Å. Rh is bonded to twelve Be atoms to form RhBe12 cuboctahedra that share corners with four equivalent RhBe12 cuboctahedra, edges with eight equivalent RhBe12 cuboctahedra, edges with sixteen equivalent BeBe8Rh4 cuboctahedra, faces with four equivalent RhBe12 cuboctahedra, and faces with eight equivalent BeBe8Rh4 cuboctahedra.