data_Rb2P3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.91
_cell_length_b   8.72
_cell_length_c   6.68
_cell_angle_alpha   69.22
_cell_angle_beta   66.24
_cell_angle_gamma   44.53
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Rb2P3
_chemical_formula_sum   'Rb4 P6'
_cell_volume   331.43
_cell_formula_units_Z   2
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
  Rb  Rb0  1  0.27  0.45  0.72  1.0
  Rb  Rb1  1  0.82  0.35  0.16  1.0
  Rb  Rb2  1  0.55  0.08  0.44  1.0
  Rb  Rb3  1  0.55  0.71  0.44  1.0
  P  P4  1  0.55  0.9  0.7  1.0
  P  P5  1  0.55  0.9  0.18  1.0
  P  P6  1  0.88  0.9  0.36  1.0
  P  P7  1  0.88  0.9  0.53  1.0
  P  P8  1  0.22  0.9  0.53  1.0
  P  P9  1  0.22  0.9  0.36  1.0

data_Rb2P3
_symmetry_space_group_name_H-M   P-1
_cell_length_a   6.68
_cell_length_b   6.68
_cell_length_c   8.72
_cell_angle_alpha   110.78
_cell_angle_beta   110.78
_cell_angle_gamma   94.25
_symmetry_Int_Tables_number   2
_chemical_formula_structural   Rb2P3
_chemical_formula_sum   'Rb4 P6'
_cell_volume   331.43
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Rb  Rb0  2  0.19  0.19  0.69  1.0
  Rb  Rb1  2  0.44  0.45  0.22  1.0
  P  P2  2  0.24  0.0  0.83  1.0
  P  P3  2  0.26  0.0  0.5  1.0
  P  P4  2  0.41  0.0  0.83  1.0

Rb Rb Rb Rb P P P P P P
Rb Rb Rb Rb P P P P P P 0 4 o - o 0 7 - o o 0 6 - o o 0 2 o o o 0 9 o o o 0 8 o o o 1 7 o - o 1 6 o - o 1 3 o o o 1 9 + - o 1 8 + - o 1 5 o o o 2 4 o - o 2 6 o - o 3 8 o o o 3 5 o o o 6 7 o o o 8 9 o o o 
Rb2P3 is BCT5 structured and crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two Rb2P3 clusters. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 1-coordinate geometry to one P(3) atom. The Rb(1)-P(3) bond length is 3.14 Å. In the second Rb site, Rb(2) is bonded in a 2-coordinate geometry to one P(1), one P(2), and one P(3) atom. The Rb(2)-P(1) bond length is 1.91 Å. The Rb(2)-P(2) bond length is 2.02 Å. The Rb(2)-P(3) bond length is 2.34 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded in a distorted single-bond geometry to one Rb(2) atom. In the second P site, P(2) is bonded in a distorted L-shaped geometry to one Rb(2) and one P(3) atom. The P(2)-P(3) bond length is 1.14 Å. In the third P site, P(3) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(2), and one P(2) atom.