data_SbP2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.51
_cell_length_b   6.51
_cell_length_c   6.51
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SbP2
_chemical_formula_sum   'Sb4 P8'
_cell_volume   275.84
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Sb  Sb8  1  0.25  0.0  0.25  1.0
  Sb  Sb9  1  0.0  0.25  0.25  1.0
  Sb  Sb10  1  0.0  0.0  0.0  1.0
  Sb  Sb11  1  0.25  0.25  0.0  1.0
  P  P0  1  0.62  0.87  0.89  1.0
  P  P1  1  0.89  0.64  0.62  1.0
  P  P2  1  0.87  0.89  0.62  1.0
  P  P3  1  0.64  0.62  0.89  1.0
  P  P4  1  0.89  0.62  0.87  1.0
  P  P5  1  0.62  0.89  0.64  1.0
  P  P6  1  0.64  0.64  0.64  1.0
  P  P7  1  0.87  0.87  0.87  1.0

data_SbP2
_symmetry_space_group_name_H-M   R3
_cell_length_a   9.21
_cell_length_b   9.21
_cell_length_c   11.27
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   146
_chemical_formula_structural   SbP2
_chemical_formula_sum   'Sb12 P24'
_cell_volume   827.51
_cell_formula_units_Z   12
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  'x+1/3, y+2/3, z+2/3'
  5  '-y+1/3, x-y+2/3, z+2/3'
  6  '-x+y+1/3, -x+2/3, z+2/3'
  7  'x+2/3, y+1/3, z+1/3'
  8  '-y+2/3, x-y+1/3, z+1/3'
  9  '-x+y+2/3, -x+1/3, z+1/3'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Sb  Sb0  9  0.08  0.17  0.17  1.0
  Sb  Sb1  3  0.0  0.0  0.0  1.0
  P  P2  9  0.08  0.18  0.79  1.0
  P  P3  9  0.18  0.1  0.72  1.0
  P  P4  3  0.0  0.0  0.64  1.0
  P  P5  3  0.0  0.0  0.87  1.0

Sb Sb Sb Sb P P P P P P P P
SbP2 is alpha Po structured and crystallizes in the trigonal R3 space group. The structure is zero-dimensional and consists of three SbP2 clusters. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 3-coordinate geometry to one Sb(2) and two equivalent Sb(1) atoms. The Sb(1)-Sb(2) bond length is 2.35 Å. Both Sb(1)-Sb(1) bond lengths are 2.35 Å. In the second Sb site, Sb(2) is bonded in a single-bond geometry to three equivalent Sb(1) and one P(4) atom. The Sb(2)-P(4) bond length is 1.43 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded in a 3-coordinate geometry to one P(4) and two equivalent P(2) atoms. The P(1)-P(4) bond length is 1.66 Å. Both P(1)-P(2) bond lengths are 1.66 Å. In the second P site, P(2) is bonded in a distorted T-shaped geometry to one P(3) and two equivalent P(1) atoms. The P(2)-P(3) bond length is 1.66 Å. In the third P site, P(3) is bonded in a distorted T-shaped geometry to three equivalent P(2) atoms. In the fourth P site, P(4) is bonded in a 4-coordinate geometry to one Sb(2) and three equivalent P(1) atoms.