Sb crystallizes in the triclinic P-1 space group. There are nine inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted hexagonal planar geometry to two equivalent Sb(5), two equivalent Sb(6), and two equivalent Sb(7) atoms. In the second Sb site, Sb(2) is bonded to two equivalent Sb(7), two equivalent Sb(8), and two equivalent Sb(9) atoms to form SbSb6 octahedra that share corners with two equivalent Sb(9)Sb5 trigonal bipyramids and edges with two equivalent Sb(3)Sb6 octahedra. In the third Sb site, Sb(3) is bonded to two equivalent Sb(5), two equivalent Sb(7), and two equivalent Sb(9) atoms to form edge-sharing SbSb6 octahedra. In the fourth Sb site, Sb(4) is bonded in a distorted hexagonal planar geometry to two equivalent Sb(6), two equivalent Sb(8), and two equivalent Sb(9) atoms. In the fifth Sb site, Sb(5) is bonded in a distorted rectangular see-saw-like geometry to one Sb(1), one Sb(3), one Sb(7), and one Sb(8) atom. In the sixth Sb site, Sb(6) is bonded in a 5-coordinate geometry to one Sb(1), one Sb(4), one Sb(7), one Sb(8), and one Sb(9) atom. In the seventh Sb site, Sb(7) is bonded in a 5-coordinate geometry to one Sb(1), one Sb(2), one Sb(3), one Sb(5), and one Sb(6) atom. In the eighth Sb site, Sb(8) is bonded in a 6-coordinate geometry to one Sb(2), one Sb(4), one Sb(5), one Sb(6), one Sb(8), and one Sb(9) atom. In the ninth Sb site, Sb(9) is bonded to one Sb(2), one Sb(3), one Sb(4), one Sb(6), and one Sb(8) atom to form distorted SbSb5 trigonal bipyramids that share  a cornercorner with one Sb(2)Sb6 octahedra and corners with three equivalent Sb(9)Sb5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 33°.
Sb crystallizes in the triclinic P-1 space group. There are nine inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted hexagonal planar geometry to two equivalent Sb(5), two equivalent Sb(6), and two equivalent Sb(7) atoms. Both Sb(1)-Sb(5) bond lengths are 3.05 Å. Both Sb(1)-Sb(6) bond lengths are 3.10 Å. Both Sb(1)-Sb(7) bond lengths are 3.19 Å. In the second Sb site, Sb(2) is bonded to two equivalent Sb(7), two equivalent Sb(8), and two equivalent Sb(9) atoms to form SbSb6 octahedra that share corners with two equivalent Sb(9)Sb5 trigonal bipyramids and edges with two equivalent Sb(3)Sb6 octahedra. Both Sb(2)-Sb(7) bond lengths are 3.25 Å. Both Sb(2)-Sb(8) bond lengths are 3.10 Å. Both Sb(2)-Sb(9) bond lengths are 3.09 Å. In the third Sb site, Sb(3) is bonded to two equivalent Sb(5), two equivalent Sb(7), and two equivalent Sb(9) atoms to form edge-sharing SbSb6 octahedra. Both Sb(3)-Sb(5) bond lengths are 3.01 Å. Both Sb(3)-Sb(7) bond lengths are 3.27 Å. Both Sb(3)-Sb(9) bond lengths are 3.06 Å. In the fourth Sb site, Sb(4) is bonded in a distorted hexagonal planar geometry to two equivalent Sb(6), two equivalent Sb(8), and two equivalent Sb(9) atoms. Both Sb(4)-Sb(6) bond lengths are 3.13 Å. Both Sb(4)-Sb(8) bond lengths are 3.10 Å. Both Sb(4)-Sb(9) bond lengths are 3.09 Å. In the fifth Sb site, Sb(5) is bonded in a distorted rectangular see-saw-like geometry to one Sb(1), one Sb(3), one Sb(7), and one Sb(8) atom. The Sb(5)-Sb(7) bond length is 2.97 Å. The Sb(5)-Sb(8) bond length is 2.89 Å. In the sixth Sb site, Sb(6) is bonded in a 5-coordinate geometry to one Sb(1), one Sb(4), one Sb(7), one Sb(8), and one Sb(9) atom. The Sb(6)-Sb(7) bond length is 3.03 Å. The Sb(6)-Sb(8) bond length is 3.34 Å. The Sb(6)-Sb(9) bond length is 2.98 Å. In the seventh Sb site, Sb(7) is bonded in a 5-coordinate geometry to one Sb(1), one Sb(2), one Sb(3), one Sb(5), and one Sb(6) atom. In the eighth Sb site, Sb(8) is bonded in a 6-coordinate geometry to one Sb(2), one Sb(4), one Sb(5), one Sb(6), one Sb(8), and one Sb(9) atom. The Sb(8)-Sb(8) bond length is 2.96 Å. The Sb(8)-Sb(9) bond length is 3.25 Å. In the ninth Sb site, Sb(9) is bonded to one Sb(2), one Sb(3), one Sb(4), one Sb(6), and one Sb(8) atom to form distorted SbSb5 trigonal bipyramids that share  a cornercorner with one Sb(2)Sb6 octahedra and corners with three equivalent Sb(9)Sb5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 33°.