HoSn3 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to two equivalent Sn(1), two equivalent Sn(3), two equivalent Sn(5), two equivalent Sn(6), and four equivalent Sn(4) atoms to form HoSn12 cuboctahedra that share corners with four equivalent Ho(1)Sn12 cuboctahedra, corners with two equivalent Sn(2)Ho4Sn square pyramids, and faces with four equivalent Ho(1)Sn12 cuboctahedra. In the second Ho site, Ho(2) is bonded in a 9-coordinate geometry to one Sn(5), two equivalent Sn(1), two equivalent Sn(6), and four equivalent Sn(2) atoms. There are six 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 Sn(6) atoms. In the second Sn site, Sn(2) is bonded to four equivalent Ho(2) and one Sn(3) atom to form distorted SnHo4Sn square pyramids that share corners with two equivalent Ho(1)Sn12 cuboctahedra, corners with four equivalent Sn(2)Ho4Sn square pyramids, and edges with four equivalent Sn(2)Ho4Sn square pyramids. In the third Sn site, Sn(3) is bonded in a 9-coordinate geometry to two equivalent Ho(1), one Sn(2), two equivalent Sn(4), and four equivalent Sn(5) atoms. In the fourth Sn site, Sn(4) is bonded in a rectangular see-saw-like geometry to four equivalent Ho(1), two equivalent Sn(3), and two equivalent Sn(5) atoms. In the fifth Sn site, Sn(5) is bonded in a 9-coordinate geometry to one Ho(2), two equivalent Ho(1), two equivalent Sn(4), and four equivalent Sn(3) atoms. In the sixth Sn site, Sn(6) is bonded in a 8-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), and four equivalent Sn(1) atoms.
HoSn3 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to two equivalent Sn(1), two equivalent Sn(3), two equivalent Sn(5), two equivalent Sn(6), and four equivalent Sn(4) atoms to form HoSn12 cuboctahedra that share corners with four equivalent Ho(1)Sn12 cuboctahedra, corners with two equivalent Sn(2)Ho4Sn square pyramids, and faces with four equivalent Ho(1)Sn12 cuboctahedra. Both Ho(1)-Sn(1) bond lengths are 3.41 Å. Both Ho(1)-Sn(3) bond lengths are 3.43 Å. Both Ho(1)-Sn(5) bond lengths are 3.44 Å. Both Ho(1)-Sn(6) bond lengths are 3.43 Å. All Ho(1)-Sn(4) bond lengths are 3.13 Å. In the second Ho site, Ho(2) is bonded in a 9-coordinate geometry to one Sn(5), two equivalent Sn(1), two equivalent Sn(6), and four equivalent Sn(2) atoms. The Ho(2)-Sn(5) bond length is 3.31 Å. Both Ho(2)-Sn(1) bond lengths are 3.36 Å. Both Ho(2)-Sn(6) bond lengths are 3.33 Å. All Ho(2)-Sn(2) bond lengths are 3.15 Å. There are six 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 Sn(6) atoms. All Sn(1)-Sn(6) bond lengths are 3.13 Å. In the second Sn site, Sn(2) is bonded to four equivalent Ho(2) and one Sn(3) atom to form distorted SnHo4Sn square pyramids that share corners with two equivalent Ho(1)Sn12 cuboctahedra, corners with four equivalent Sn(2)Ho4Sn square pyramids, and edges with four equivalent Sn(2)Ho4Sn square pyramids. The Sn(2)-Sn(3) bond length is 3.01 Å. In the third Sn site, Sn(3) is bonded in a 9-coordinate geometry to two equivalent Ho(1), one Sn(2), two equivalent Sn(4), and four equivalent Sn(5) atoms. Both Sn(3)-Sn(4) bond lengths are 3.32 Å. All Sn(3)-Sn(5) bond lengths are 3.13 Å. In the fourth Sn site, Sn(4) is bonded in a rectangular see-saw-like geometry to four equivalent Ho(1), two equivalent Sn(3), and two equivalent Sn(5) atoms. Both Sn(4)-Sn(5) bond lengths are 3.33 Å. In the fifth Sn site, Sn(5) is bonded in a 9-coordinate geometry to one Ho(2), two equivalent Ho(1), two equivalent Sn(4), and four equivalent Sn(3) atoms. In the sixth Sn site, Sn(6) is bonded in a 8-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), and four equivalent Sn(1) atoms.