Be3Co is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Be(1) is bonded to eight equivalent Be(1) and four equivalent Co(1) atoms to form distorted BeBe8Co4 cuboctahedra that share corners with four equivalent Co(1)Be12 cuboctahedra, corners with fourteen equivalent Be(1)Be8Co4 cuboctahedra, edges with six equivalent Co(1)Be12 cuboctahedra, edges with twelve equivalent Be(1)Be8Co4 cuboctahedra, faces with four equivalent Co(1)Be12 cuboctahedra, and faces with sixteen equivalent Be(1)Be8Co4 cuboctahedra. Co(1) is bonded to twelve equivalent Be(1) atoms to form CoBe12 cuboctahedra that share corners with six equivalent Co(1)Be12 cuboctahedra, corners with twelve equivalent Be(1)Be8Co4 cuboctahedra, edges with eighteen equivalent Be(1)Be8Co4 cuboctahedra, faces with eight equivalent Co(1)Be12 cuboctahedra, and faces with twelve equivalent Be(1)Be8Co4 cuboctahedra.
Be3Co is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Be(1) is bonded to eight equivalent Be(1) and four equivalent Co(1) atoms to form distorted BeBe8Co4 cuboctahedra that share corners with four equivalent Co(1)Be12 cuboctahedra, corners with fourteen equivalent Be(1)Be8Co4 cuboctahedra, edges with six equivalent Co(1)Be12 cuboctahedra, edges with twelve equivalent Be(1)Be8Co4 cuboctahedra, faces with four equivalent Co(1)Be12 cuboctahedra, and faces with sixteen equivalent Be(1)Be8Co4 cuboctahedra. There are a spread of Be(1)-Be(1) bond distances ranging from 2.24-2.29 Å. There are two shorter (2.24 Å) and two longer (2.28 Å) Be(1)-Co(1) bond lengths. Co(1) is bonded to twelve equivalent Be(1) atoms to form CoBe12 cuboctahedra that share corners with six equivalent Co(1)Be12 cuboctahedra, corners with twelve equivalent Be(1)Be8Co4 cuboctahedra, edges with eighteen equivalent Be(1)Be8Co4 cuboctahedra, faces with eight equivalent Co(1)Be12 cuboctahedra, and faces with twelve equivalent Be(1)Be8Co4 cuboctahedra.