data_SrP
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.19
_cell_length_b   5.19
_cell_length_c   5.19
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrP
_chemical_formula_sum   'Sr2 P2'
_cell_volume   98.72
_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
  Sr  Sr2  1  0.67  0.67  0.67  1.0
  Sr  Sr3  1  0.5  0.5  0.5  1.0
  P  P0  1  0.0  0.0  0.0  1.0
  P  P1  1  0.83  0.83  0.83  1.0

data_SrP
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.19
_cell_length_b   5.19
_cell_length_c   12.71
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   SrP
_chemical_formula_sum   'Sr6 P6'
_cell_volume   296.15
_cell_formula_units_Z   6
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  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+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
  Sr  Sr0  3  0.0  0.0  0.33  1.0
  Sr  Sr1  3  0.0  0.0  0.5  1.0
  P  P2  3  0.0  0.0  0.0  1.0
  P  P3  3  0.0  0.0  0.17  1.0

Sr Sr P P
Sr Sr P P 0 1 o o o 0 3 o o o 2 3 - - - 
SrP crystallizes in the trigonal R3m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted single-bond geometry to one Sr(2), one P(2), and three equivalent P(1) atoms. The Sr(1)-Sr(2) bond length is 2.11 Å. The Sr(1)-P(2) bond length is 2.11 Å. All Sr(1)-P(1) bond lengths are 3.00 Å. In the second Sr site, Sr(2) is bonded to one Sr(1) and three equivalent P(2) atoms to form distorted SrSrP3 trigonal pyramids that share corners with six equivalent Sr(2)SrP3 trigonal pyramids and edges with three equivalent P(1)Sr3P trigonal pyramids. All Sr(2)-P(2) bond lengths are 3.00 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to three equivalent Sr(1) and one P(2) atom to form distorted PSr3P trigonal pyramids that share corners with six equivalent P(1)Sr3P trigonal pyramids and edges with three equivalent Sr(2)SrP3 trigonal pyramids. The P(1)-P(2) bond length is 2.11 Å. In the second P site, P(2) is bonded in a distorted single-bond geometry to one Sr(1), three equivalent Sr(2), and one P(1) atom.