Materials Data on U2(PdRh)3 by Materials Project

Abstract

U2(RhPd)3 is beta Cu3Ti-derived structured and crystallizes in the orthorhombic Pmmm space group. The structure is three-dimensional. U is bonded to six Rh and six Pd atoms to form UPd6Rh6 cuboctahedra that share corners with twelve equivalent UPd6Rh6 cuboctahedra, edges with twelve RhU4Pd6Rh2 cuboctahedra, edges with twelve PdU4Pd4Rh4 cuboctahedra, faces with six equivalent UPd6Rh6 cuboctahedra, faces with six RhU4Pd6Rh2 cuboctahedra, and faces with six PdU4Pd4Rh4 cuboctahedra. All U–Rh bond lengths are 2.84 Å. There are a spread of U–Pd bond distances ranging from 2.88–2.97 Å. There are two inequivalent Rh sites. In the first Rh site, Rh is bonded to four equivalent U, two equivalent Rh, and six Pd atoms to form distorted RhU4Pd6Rh2 cuboctahedra that share corners with twelve equivalent RhU4Pd6Rh2 cuboctahedra, edges with four equivalent RhU4Pd4Rh4 cuboctahedra, edges with eight equivalent UPd6Rh6 cuboctahedra, edges with twelve PdU4Pd4Rh4 cuboctahedra, faces with four equivalent UPd6Rh6 cuboctahedra, faces with six PdU4Pd4Rh4 cuboctahedra, and faces with eight RhU4Pd6Rh2 cuboctahedra. Both Rh–Rh bond lengths are 2.92 Å. There are four shorter (2.88 Å) and two longer (2.92 Å) Rh–Pd bond lengths. In the second Rh site, Rh is bonded to four equivalent U, four equivalent Rh, and four equivalent Pd atoms to form distorted RhU4Pd4Rh4 cuboctahedra that share corners with four equivalent RhU4Pd4Rh4 cuboctahedra, corners with eight equivalent PdU4Pd4Rh4 cuboctahedra, edges with eight equivalent UPd6Rh6 cuboctahedra, edges with eight equivalent RhU4Pd6Rh2 cuboctahedra, edges with eight equivalent PdU4Pd4Rh4 cuboctahedra, faces with four equivalent UPd6Rh6 cuboctahedra, faces with six PdU4Pd4Rh4 cuboctahedra, and faces with eight RhU4Pd6Rh2 cuboctahedra. All Rh–Pd bond lengths are 2.84 Å. There are three inequivalent Pd sites. In the first Pd site, Pd is bonded to four equivalent U, four equivalent Rh, and four equivalent Pd atoms to form distorted PdU4Pd4Rh4 cuboctahedra that share corners with four equivalent PdU4Pd4Rh4 cuboctahedra, corners with eight equivalent RhU4Pd4Rh4 cuboctahedra, edges with eight equivalent UPd6Rh6 cuboctahedra, edges with eight equivalent RhU4Pd6Rh2 cuboctahedra, edges with eight equivalent PdU4Rh8 cuboctahedra, faces with four equivalent UPd6Rh6 cuboctahedra, faces with six RhU4Pd6Rh2 cuboctahedra, and faces with eight PdU4Pd4Rh4 cuboctahedra. All Pd–Pd bond lengths are 2.84 Å. In the second Pd site, Pd is bonded to four equivalent U and eight Rh atoms to form PdU4Rh8 cuboctahedra that share corners with twelve PdU4Rh8 cuboctahedra, edges with eight equivalent UPd6Rh6 cuboctahedra, edges with eight equivalent RhU4Pd6Rh2 cuboctahedra, edges with eight equivalent PdU4Pd4Rh4 cuboctahedra, faces with four equivalent UPd6Rh6 cuboctahedra, faces with six PdU4Rh8 cuboctahedra, and faces with eight RhU4Pd6Rh2 cuboctahedra. In the third Pd site, Pd is bonded to four equivalent U, four equivalent Rh, and four equivalent Pd atoms to form PdU4Pd4Rh4 cuboctahedra that share corners with twelve PdU4Rh8 cuboctahedra, edges with eight equivalent UPd6Rh6 cuboctahedra, edges with sixteen RhU4Pd6Rh2 cuboctahedra, faces with four equivalent UPd6Rh6 cuboctahedra, faces with four equivalent RhU4Pd6Rh2 cuboctahedra, and faces with ten PdU4Pd4Rh4 cuboctahedra.