Y2CoIn8 crystallizes in the tetragonal P4/mmm space group. Y(1) is bonded to four equivalent In(1), four equivalent In(2), and four equivalent In(3) atoms to form YIn12 cuboctahedra that share corners with eight equivalent Y(1)In12 cuboctahedra, edges with four equivalent In(3)Y4In8 cuboctahedra, edges with eight equivalent In(2)Y4In8 cuboctahedra, faces with four equivalent In(2)Y4In8 cuboctahedra, faces with four equivalent In(3)Y4In8 cuboctahedra, and faces with five equivalent Y(1)In12 cuboctahedra. Co(1) is bonded in a body-centered cubic geometry to eight equivalent In(1) atoms. There are three inequivalent In sites. In the first In site, In(1) is bonded in a 11-coordinate geometry to two equivalent Y(1), two equivalent Co(1), two equivalent In(3), and five equivalent In(1) atoms. In the second In site, In(2) is bonded to four equivalent Y(1), four equivalent In(2), and four equivalent In(3) atoms to form distorted InY4In8 cuboctahedra that share corners with four equivalent In(2)Y4In8 cuboctahedra, edges with eight equivalent Y(1)In12 cuboctahedra, edges with eight equivalent In(3)Y4In8 cuboctahedra, faces with four equivalent Y(1)In12 cuboctahedra, faces with four equivalent In(3)Y4In8 cuboctahedra, and faces with eight equivalent In(2)Y4In8 cuboctahedra. In the third In site, In(3) is bonded to four equivalent Y(1), four equivalent In(1), and four equivalent In(2) atoms to form distorted InY4In8 cuboctahedra that share corners with eight equivalent In(3)Y4In8 cuboctahedra, edges with four equivalent Y(1)In12 cuboctahedra, edges with eight equivalent In(2)Y4In8 cuboctahedra, faces with four equivalent Y(1)In12 cuboctahedra, faces with four equivalent In(2)Y4In8 cuboctahedra, and faces with five equivalent In(3)Y4In8 cuboctahedra.
Y2CoIn8 crystallizes in the tetragonal P4/mmm space group. Y(1) is bonded to four equivalent In(1), four equivalent In(2), and four equivalent In(3) atoms to form YIn12 cuboctahedra that share corners with eight equivalent Y(1)In12 cuboctahedra, edges with four equivalent In(3)Y4In8 cuboctahedra, edges with eight equivalent In(2)Y4In8 cuboctahedra, faces with four equivalent In(2)Y4In8 cuboctahedra, faces with four equivalent In(3)Y4In8 cuboctahedra, and faces with five equivalent Y(1)In12 cuboctahedra. All Y(1)-In(1) bond lengths are 3.23 Å. All Y(1)-In(2) bond lengths are 3.29 Å. All Y(1)-In(3) bond lengths are 3.30 Å. Co(1) is bonded in a body-centered cubic geometry to eight equivalent In(1) atoms. All Co(1)-In(1) bond lengths are 2.74 Å. There are three inequivalent In sites. In the first In site, In(1) is bonded in a 11-coordinate geometry to two equivalent Y(1), two equivalent Co(1), two equivalent In(3), and five equivalent In(1) atoms. Both In(1)-In(3) bond lengths are 3.20 Å. There is one shorter (2.86 Å) and four longer (3.30 Å) In(1)-In(1) bond lengths. In the second In site, In(2) is bonded to four equivalent Y(1), four equivalent In(2), and four equivalent In(3) atoms to form distorted InY4In8 cuboctahedra that share corners with four equivalent In(2)Y4In8 cuboctahedra, edges with eight equivalent Y(1)In12 cuboctahedra, edges with eight equivalent In(3)Y4In8 cuboctahedra, faces with four equivalent Y(1)In12 cuboctahedra, faces with four equivalent In(3)Y4In8 cuboctahedra, and faces with eight equivalent In(2)Y4In8 cuboctahedra. All In(2)-In(2) bond lengths are 3.30 Å. All In(2)-In(3) bond lengths are 3.32 Å. In the third In site, In(3) is bonded to four equivalent Y(1), four equivalent In(1), and four equivalent In(2) atoms to form distorted InY4In8 cuboctahedra that share corners with eight equivalent In(3)Y4In8 cuboctahedra, edges with four equivalent Y(1)In12 cuboctahedra, edges with eight equivalent In(2)Y4In8 cuboctahedra, faces with four equivalent Y(1)In12 cuboctahedra, faces with four equivalent In(2)Y4In8 cuboctahedra, and faces with five equivalent In(3)Y4In8 cuboctahedra.