UMnCo crystallizes in the orthorhombic Imma space group. U(1) is bonded in a 16-coordinate geometry to four equivalent U(1), six equivalent Mn(1), and six equivalent Co(1) atoms. Mn(1) is bonded to six equivalent U(1), two equivalent Mn(1), and four equivalent Co(1) atoms to form distorted MnU6Mn2Co4 cuboctahedra that share corners with eight equivalent Co(1)U6Mn4Co2 cuboctahedra, corners with ten equivalent Mn(1)U6Mn2Co4 cuboctahedra, edges with six equivalent Mn(1)U6Mn2Co4 cuboctahedra, faces with six equivalent Mn(1)U6Mn2Co4 cuboctahedra, and faces with twelve equivalent Co(1)U6Mn4Co2 cuboctahedra. Co(1) is bonded to six equivalent U(1), four equivalent Mn(1), and two equivalent Co(1) atoms to form CoU6Mn4Co2 cuboctahedra that share corners with eight equivalent Mn(1)U6Mn2Co4 cuboctahedra, corners with ten equivalent Co(1)U6Mn4Co2 cuboctahedra, edges with six equivalent Co(1)U6Mn4Co2 cuboctahedra, faces with six equivalent Co(1)U6Mn4Co2 cuboctahedra, and faces with twelve equivalent Mn(1)U6Mn2Co4 cuboctahedra.
UMnCo crystallizes in the orthorhombic Imma space group. U(1) is bonded in a 16-coordinate geometry to four equivalent U(1), six equivalent Mn(1), and six equivalent Co(1) atoms. There are two shorter (3.02 Å) and two longer (3.03 Å) U(1)-U(1) bond lengths. There are two shorter (2.89 Å) and four longer (2.91 Å) U(1)-Mn(1) bond lengths. There are four shorter (2.89 Å) and two longer (2.91 Å) U(1)-Co(1) bond lengths. Mn(1) is bonded to six equivalent U(1), two equivalent Mn(1), and four equivalent Co(1) atoms to form distorted MnU6Mn2Co4 cuboctahedra that share corners with eight equivalent Co(1)U6Mn4Co2 cuboctahedra, corners with ten equivalent Mn(1)U6Mn2Co4 cuboctahedra, edges with six equivalent Mn(1)U6Mn2Co4 cuboctahedra, faces with six equivalent Mn(1)U6Mn2Co4 cuboctahedra, and faces with twelve equivalent Co(1)U6Mn4Co2 cuboctahedra. Both Mn(1)-Mn(1) bond lengths are 2.46 Å. All Mn(1)-Co(1) bond lengths are 2.47 Å. Co(1) is bonded to six equivalent U(1), four equivalent Mn(1), and two equivalent Co(1) atoms to form CoU6Mn4Co2 cuboctahedra that share corners with eight equivalent Mn(1)U6Mn2Co4 cuboctahedra, corners with ten equivalent Co(1)U6Mn4Co2 cuboctahedra, edges with six equivalent Co(1)U6Mn4Co2 cuboctahedra, faces with six equivalent Co(1)U6Mn4Co2 cuboctahedra, and faces with twelve equivalent Mn(1)U6Mn2Co4 cuboctahedra. Both Co(1)-Co(1) bond lengths are 2.48 Å.