Ho11Sn10 crystallizes in the tetragonal I4/mmm space group. There are four inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one Sn(1), one Sn(2), one Sn(4), and four equivalent Sn(5) atoms to form a mixture of distorted edge, corner, and face-sharing HoSn7 pentagonal bipyramids. In the second Ho site, Ho(2) is bonded in a 7-coordinate geometry to one Sn(3), two equivalent Sn(1), two equivalent Sn(2), and two equivalent Sn(5) atoms. In the third Ho site, Ho(3) is bonded in a 9-coordinate geometry to one Sn(2), four equivalent Sn(3), and four equivalent Sn(5) atoms. In the fourth Ho site, Ho(4) is bonded in a 7-coordinate geometry to one Sn(4), two equivalent Sn(1), two equivalent Sn(3), and two equivalent Sn(5) atoms. There are five inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), and four equivalent Ho(4) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to one Ho(3), four equivalent Ho(1), and four equivalent Ho(2) atoms. In the third Sn site, Sn(3) is bonded in a 11-coordinate geometry to one Ho(2), two equivalent Ho(3), four equivalent Ho(4), two equivalent Sn(3), and two equivalent Sn(5) atoms. In the fourth Sn site, Sn(4) is bonded in a 8-coordinate geometry to four equivalent Ho(1) and four equivalent Ho(4) atoms. In the fifth Sn site, Sn(5) is bonded in a 10-coordinate geometry to one Ho(2), one Ho(3), two equivalent Ho(4), four equivalent Ho(1), one Sn(3), and one Sn(5) atom.
Ho11Sn10 crystallizes in the tetragonal I4/mmm space group. There are four inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one Sn(1), one Sn(2), one Sn(4), and four equivalent Sn(5) atoms to form a mixture of distorted edge, corner, and face-sharing HoSn7 pentagonal bipyramids. The Ho(1)-Sn(1) bond length is 3.39 Å. The Ho(1)-Sn(2) bond length is 3.15 Å. The Ho(1)-Sn(4) bond length is 3.03 Å. There are two shorter (3.32 Å) and two longer (3.41 Å) Ho(1)-Sn(5) bond lengths. In the second Ho site, Ho(2) is bonded in a 7-coordinate geometry to one Sn(3), two equivalent Sn(1), two equivalent Sn(2), and two equivalent Sn(5) atoms. The Ho(2)-Sn(3) bond length is 3.18 Å. Both Ho(2)-Sn(1) bond lengths are 2.87 Å. Both Ho(2)-Sn(2) bond lengths are 3.39 Å. Both Ho(2)-Sn(5) bond lengths are 3.54 Å. In the third Ho site, Ho(3) is bonded in a 9-coordinate geometry to one Sn(2), four equivalent Sn(3), and four equivalent Sn(5) atoms. The Ho(3)-Sn(2) bond length is 3.72 Å. All Ho(3)-Sn(3) bond lengths are 3.49 Å. All Ho(3)-Sn(5) bond lengths are 3.34 Å. In the fourth Ho site, Ho(4) is bonded in a 7-coordinate geometry to one Sn(4), two equivalent Sn(1), two equivalent Sn(3), and two equivalent Sn(5) atoms. The Ho(4)-Sn(4) bond length is 3.15 Å. Both Ho(4)-Sn(1) bond lengths are 3.07 Å. Both Ho(4)-Sn(3) bond lengths are 3.23 Å. Both Ho(4)-Sn(5) bond lengths are 3.03 Å. There are five inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), and four equivalent Ho(4) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to one Ho(3), four equivalent Ho(1), and four equivalent Ho(2) atoms. In the third Sn site, Sn(3) is bonded in a 11-coordinate geometry to one Ho(2), two equivalent Ho(3), four equivalent Ho(4), two equivalent Sn(3), and two equivalent Sn(5) atoms. Both Sn(3)-Sn(3) bond lengths are 2.98 Å. Both Sn(3)-Sn(5) bond lengths are 3.20 Å. In the fourth Sn site, Sn(4) is bonded in a 8-coordinate geometry to four equivalent Ho(1) and four equivalent Ho(4) atoms. In the fifth Sn site, Sn(5) is bonded in a 10-coordinate geometry to one Ho(2), one Ho(3), two equivalent Ho(4), four equivalent Ho(1), one Sn(3), and one Sn(5) atom. The Sn(5)-Sn(5) bond length is 2.87 Å.