UCrNi crystallizes in the orthorhombic Imma space group. U(1) is bonded in a 16-coordinate geometry to four equivalent U(1), six equivalent Cr(1), and six equivalent Ni(1) atoms. Cr(1) is bonded to six equivalent U(1), two equivalent Cr(1), and four equivalent Ni(1) atoms to form distorted CrU6Cr2Ni4 cuboctahedra that share corners with eight equivalent Ni(1)U6Cr4Ni2 cuboctahedra, corners with ten equivalent Cr(1)U6Cr2Ni4 cuboctahedra, edges with six equivalent Cr(1)U6Cr2Ni4 cuboctahedra, faces with six equivalent Cr(1)U6Cr2Ni4 cuboctahedra, and faces with twelve equivalent Ni(1)U6Cr4Ni2 cuboctahedra. Ni(1) is bonded to six equivalent U(1), four equivalent Cr(1), and two equivalent Ni(1) atoms to form NiU6Cr4Ni2 cuboctahedra that share corners with eight equivalent Cr(1)U6Cr2Ni4 cuboctahedra, corners with ten equivalent Ni(1)U6Cr4Ni2 cuboctahedra, edges with six equivalent Ni(1)U6Cr4Ni2 cuboctahedra, faces with six equivalent Ni(1)U6Cr4Ni2 cuboctahedra, and faces with twelve equivalent Cr(1)U6Cr2Ni4 cuboctahedra.
UCrNi crystallizes in the orthorhombic Imma space group. U(1) is bonded in a 16-coordinate geometry to four equivalent U(1), six equivalent Cr(1), and six equivalent Ni(1) atoms. There are two shorter (3.05 Å) and two longer (3.11 Å) U(1)-U(1) bond lengths. There are four shorter (2.89 Å) and two longer (3.04 Å) U(1)-Cr(1) bond lengths. There are four shorter (2.88 Å) and two longer (3.08 Å) U(1)-Ni(1) bond lengths. Cr(1) is bonded to six equivalent U(1), two equivalent Cr(1), and four equivalent Ni(1) atoms to form distorted CrU6Cr2Ni4 cuboctahedra that share corners with eight equivalent Ni(1)U6Cr4Ni2 cuboctahedra, corners with ten equivalent Cr(1)U6Cr2Ni4 cuboctahedra, edges with six equivalent Cr(1)U6Cr2Ni4 cuboctahedra, faces with six equivalent Cr(1)U6Cr2Ni4 cuboctahedra, and faces with twelve equivalent Ni(1)U6Cr4Ni2 cuboctahedra. Both Cr(1)-Cr(1) bond lengths are 2.45 Å. All Cr(1)-Ni(1) bond lengths are 2.55 Å. Ni(1) is bonded to six equivalent U(1), four equivalent Cr(1), and two equivalent Ni(1) atoms to form NiU6Cr4Ni2 cuboctahedra that share corners with eight equivalent Cr(1)U6Cr2Ni4 cuboctahedra, corners with ten equivalent Ni(1)U6Cr4Ni2 cuboctahedra, edges with six equivalent Ni(1)U6Cr4Ni2 cuboctahedra, faces with six equivalent Ni(1)U6Cr4Ni2 cuboctahedra, and faces with twelve equivalent Cr(1)U6Cr2Ni4 cuboctahedra. Both Ni(1)-Ni(1) bond lengths are 2.44 Å.