Ho5CoBi2 crystallizes in the orthorhombic Pnma space group. There are four inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one Co(1) and four equivalent Bi(1) atoms to form a mixture of distorted face, corner, and edge-sharing HoCoBi4 trigonal bipyramids. In the second Ho site, Ho(2) is bonded in a 5-coordinate geometry to one Co(1) and four equivalent Bi(1) atoms. In the third Ho site, Ho(3) is bonded in a 5-coordinate geometry to two equivalent Co(1) and three equivalent Bi(1) atoms. In the fourth Ho site, Ho(4) is bonded to one Co(1) and four equivalent Bi(1) atoms to form a mixture of distorted face, corner, and edge-sharing HoCoBi4 trigonal bipyramids. Co(1) is bonded to one Ho(1), one Ho(2), one Ho(4), and four equivalent Ho(3) atoms to form distorted edge-sharing CoHo7 pentagonal bipyramids. Bi(1) is bonded in a 9-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), two equivalent Ho(4), and three equivalent Ho(3) atoms.
Ho5CoBi2 crystallizes in the orthorhombic Pnma space group. There are four inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one Co(1) and four equivalent Bi(1) atoms to form a mixture of distorted face, corner, and edge-sharing HoCoBi4 trigonal bipyramids. The Ho(1)-Co(1) bond length is 2.65 Å. There are two shorter (3.18 Å) and two longer (3.19 Å) Ho(1)-Bi(1) bond lengths. In the second Ho site, Ho(2) is bonded in a 5-coordinate geometry to one Co(1) and four equivalent Bi(1) atoms. The Ho(2)-Co(1) bond length is 2.64 Å. There are two shorter (3.21 Å) and two longer (3.29 Å) Ho(2)-Bi(1) bond lengths. In the third Ho site, Ho(3) is bonded in a 5-coordinate geometry to two equivalent Co(1) and three equivalent Bi(1) atoms. There is one shorter (2.75 Å) and one longer (2.81 Å) Ho(3)-Co(1) bond length. There are a spread of Ho(3)-Bi(1) bond distances ranging from 3.36-3.57 Å. In the fourth Ho site, Ho(4) is bonded to one Co(1) and four equivalent Bi(1) atoms to form a mixture of distorted face, corner, and edge-sharing HoCoBi4 trigonal bipyramids. The Ho(4)-Co(1) bond length is 3.06 Å. All Ho(4)-Bi(1) bond lengths are 3.14 Å. Co(1) is bonded to one Ho(1), one Ho(2), one Ho(4), and four equivalent Ho(3) atoms to form distorted edge-sharing CoHo7 pentagonal bipyramids. Bi(1) is bonded in a 9-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), two equivalent Ho(4), and three equivalent Ho(3) atoms.