Sb crystallizes in the triclinic P-1 space group. There are nine inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent Sb(6), two equivalent Sb(7), two equivalent Sb(8), and two equivalent Sb(9) atoms to form distorted SbSb8 hexagonal bipyramids that share edges with two equivalent Sb(3)Sb6 octahedra, edges with two equivalent Sb(9)Sb5 square pyramids, and faces with two equivalent Sb(2)Sb6 octahedra. In the second Sb site, Sb(2) is bonded to two equivalent Sb(6), two equivalent Sb(8), and two equivalent Sb(9) atoms to form SbSb6 octahedra that share corners with two equivalent Sb(3)Sb6 octahedra, corners with four equivalent Sb(9)Sb5 square pyramids, and faces with two equivalent Sb(1)Sb8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 55°. In the third Sb site, Sb(3) is bonded to two equivalent Sb(5), two equivalent Sb(6), and two equivalent Sb(7) atoms to form SbSb6 octahedra that share corners with two equivalent Sb(2)Sb6 octahedra, edges with two equivalent Sb(1)Sb8 hexagonal bipyramids, and edges with two equivalent Sb(9)Sb5 square pyramids. The corner-sharing octahedral tilt angles are 55°. In the fourth Sb site, Sb(4) is bonded in a distorted hexagonal planar geometry to two equivalent Sb(5), two equivalent Sb(7), and two equivalent Sb(8) atoms. In the fifth Sb site, Sb(5) is bonded in a distorted see-saw-like geometry to one Sb(3), one Sb(4), one Sb(7), and one Sb(9) atom. In the sixth Sb site, Sb(6) is bonded in a 6-coordinate geometry to one Sb(1), one Sb(2), one Sb(3), one Sb(7), one Sb(8), and one Sb(9) atom. In the seventh Sb site, Sb(7) is bonded in a 7-coordinate geometry to one Sb(1), one Sb(3), one Sb(4), one Sb(5), one Sb(6), and two equivalent Sb(8) atoms. In the eighth Sb site, Sb(8) is bonded in a 6-coordinate geometry to one Sb(1), one Sb(2), one Sb(4), one Sb(6), and two equivalent Sb(7) atoms. In the ninth Sb site, Sb(9) is bonded to one Sb(1), one Sb(2), one Sb(5), one Sb(6), and one Sb(9) atom to form SbSb5 square pyramids that share corners with two equivalent Sb(2)Sb6 octahedra, corners with two equivalent Sb(9)Sb5 square pyramids,  an edgeedge with one Sb(1)Sb8 hexagonal bipyramid, and  an edgeedge with one Sb(3)Sb6 octahedra. The corner-sharing octahedral tilt angles range from 19-37°.
Sb crystallizes in the triclinic P-1 space group. There are nine inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent Sb(6), two equivalent Sb(7), two equivalent Sb(8), and two equivalent Sb(9) atoms to form distorted SbSb8 hexagonal bipyramids that share edges with two equivalent Sb(3)Sb6 octahedra, edges with two equivalent Sb(9)Sb5 square pyramids, and faces with two equivalent Sb(2)Sb6 octahedra. Both Sb(1)-Sb(6) bond lengths are 3.03 Å. Both Sb(1)-Sb(7) bond lengths are 3.21 Å. Both Sb(1)-Sb(8) bond lengths are 3.42 Å. Both Sb(1)-Sb(9) bond lengths are 3.09 Å. In the second Sb site, Sb(2) is bonded to two equivalent Sb(6), two equivalent Sb(8), and two equivalent Sb(9) atoms to form SbSb6 octahedra that share corners with two equivalent Sb(3)Sb6 octahedra, corners with four equivalent Sb(9)Sb5 square pyramids, and faces with two equivalent Sb(1)Sb8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 55°. Both Sb(2)-Sb(6) bond lengths are 3.11 Å. Both Sb(2)-Sb(8) bond lengths are 3.26 Å. Both Sb(2)-Sb(9) bond lengths are 3.29 Å. In the third Sb site, Sb(3) is bonded to two equivalent Sb(5), two equivalent Sb(6), and two equivalent Sb(7) atoms to form SbSb6 octahedra that share corners with two equivalent Sb(2)Sb6 octahedra, edges with two equivalent Sb(1)Sb8 hexagonal bipyramids, and edges with two equivalent Sb(9)Sb5 square pyramids. The corner-sharing octahedral tilt angles are 55°. Both Sb(3)-Sb(5) bond lengths are 3.05 Å. Both Sb(3)-Sb(6) bond lengths are 3.10 Å. Both Sb(3)-Sb(7) bond lengths are 3.10 Å. In the fourth Sb site, Sb(4) is bonded in a distorted hexagonal planar geometry to two equivalent Sb(5), two equivalent Sb(7), and two equivalent Sb(8) atoms. Both Sb(4)-Sb(5) bond lengths are 3.07 Å. Both Sb(4)-Sb(7) bond lengths are 3.14 Å. Both Sb(4)-Sb(8) bond lengths are 3.34 Å. In the fifth Sb site, Sb(5) is bonded in a distorted see-saw-like geometry to one Sb(3), one Sb(4), one Sb(7), and one Sb(9) atom. The Sb(5)-Sb(7) bond length is 3.04 Å. The Sb(5)-Sb(9) bond length is 2.92 Å. In the sixth Sb site, Sb(6) is bonded in a 6-coordinate geometry to one Sb(1), one Sb(2), one Sb(3), one Sb(7), one Sb(8), and one Sb(9) atom. The Sb(6)-Sb(7) bond length is 3.41 Å. The Sb(6)-Sb(8) bond length is 3.13 Å. The Sb(6)-Sb(9) bond length is 3.01 Å. In the seventh Sb site, Sb(7) is bonded in a 7-coordinate geometry to one Sb(1), one Sb(3), one Sb(4), one Sb(5), one Sb(6), and two equivalent Sb(8) atoms. There is one shorter (3.06 Å) and one longer (3.15 Å) Sb(7)-Sb(8) bond length. In the eighth Sb site, Sb(8) is bonded in a 6-coordinate geometry to one Sb(1), one Sb(2), one Sb(4), one Sb(6), and two equivalent Sb(7) atoms. In the ninth Sb site, Sb(9) is bonded to one Sb(1), one Sb(2), one Sb(5), one Sb(6), and one Sb(9) atom to form SbSb5 square pyramids that share corners with two equivalent Sb(2)Sb6 octahedra, corners with two equivalent Sb(9)Sb5 square pyramids,  an edgeedge with one Sb(1)Sb8 hexagonal bipyramid, and  an edgeedge with one Sb(3)Sb6 octahedra. The corner-sharing octahedral tilt angles range from 19-37°. The Sb(9)-Sb(9) bond length is 3.31 Å.