The compound described by Sr10(PO4)6O crystallizes in the trigonal P3 space group. There are six inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to three equivalent O(6) and three equivalent O(7) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to three equivalent O(4), three equivalent O(5), and three equivalent O(8) atoms. In the third Sr site, Sr(3) is bonded in a 6-coordinate geometry to three equivalent O(5) and three equivalent O(8) atoms. In the fourth Sr site, Sr(4) is bonded in a 9-coordinate geometry to three equivalent O(2), three equivalent O(6), and three equivalent O(7) atoms. In the fifth Sr site, Sr(5) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(7), and one O(9) atom. In the sixth Sr site, Sr(6) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), one O(6), one O(8), and two equivalent O(3) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(1), one O(4), one O(5), and one O(7) atom. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(2), one O(3), one O(6), and one O(8) atom. There are nine inequivalent O sites. In the first O site, O(7) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(4), one Sr(5), and one P(1) atom. In the second O site, O(8) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(3), one Sr(6), and one P(2) atom. In the third O site, O(9) is bonded in a trigonal non-coplanar geometry to three equivalent Sr(5) atoms. In the fourth O site, O(1) is bonded in a distorted single-bond geometry to one Sr(5), one Sr(6), and one P(1) atom. In the fifth O site, O(2) is bonded in a 4-coordinate geometry to one Sr(4), one Sr(5), one Sr(6), and one P(2) atom. In the sixth O site, O(3) is bonded in a distorted single-bond geometry to one Sr(5), two equivalent Sr(6), and one P(2) atom. In the seventh O site, O(4) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(5), one Sr(6), and one P(1) atom. In the eighth O site, O(5) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(3), one Sr(5), and one P(1) atom. In the ninth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(4), one Sr(6), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr10P6O25
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.731
_cell_length_b   9.731
_cell_length_c   7.250
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   594.520
_cell_formula_units_Z   1
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  Sr0  1  1.000  1.000  0.521  1.0
  Sr  Sr1  1  0.667  0.333  0.981  1.0
  Sr  Sr2  1  0.667  0.333  0.487  1.0
  Sr  Sr3  1  0.000  0.000  0.013  1.0
  Sr  Sr4  1  0.109  0.430  0.759  1.0
  Sr  Sr5  1  0.570  0.679  0.759  1.0
  Sr  Sr6  1  0.321  0.891  0.759  1.0
  Sr  Sr7  1  0.586  0.935  0.242  1.0
  Sr  Sr8  1  0.065  0.651  0.242  1.0
  Sr  Sr9  1  0.349  0.414  0.242  1.0
  P  P10  1  0.363  0.292  0.746  1.0
  P  P11  1  0.708  0.071  0.746  1.0
  P  P12  1  0.929  0.637  0.746  1.0
  P  P13  1  0.305  0.029  0.251  1.0
  P  P14  1  0.971  0.276  0.251  1.0
  P  P15  1  0.724  0.695  0.251  1.0
  O  O16  1  0.404  0.408  0.584  1.0
  O  O17  1  0.592  0.996  0.584  1.0
  O  O18  1  0.004  0.596  0.584  1.0
  O  O19  1  0.236  0.934  0.071  1.0
  O  O20  1  0.066  0.303  0.071  1.0
  O  O21  1  0.697  0.764  0.071  1.0
  O  O22  1  0.272  0.906  0.403  1.0
  O  O23  1  0.094  0.366  0.403  1.0
  O  O24  1  0.634  0.728  0.403  1.0
  O  O25  1  0.428  0.388  0.926  1.0
  O  O26  1  0.612  0.040  0.926  1.0
  O  O27  1  0.960  0.572  0.926  1.0
  O  O28  1  0.448  0.195  0.720  1.0
  O  O29  1  0.805  0.252  0.720  1.0
  O  O30  1  0.748  0.552  0.720  1.0
  O  O31  1  0.218  0.122  0.286  1.0
  O  O32  1  0.878  0.096  0.286  1.0
  O  O33  1  0.904  0.782  0.286  1.0
  O  O34  1  0.182  0.184  0.759  1.0
  O  O35  1  0.816  0.999  0.759  1.0
  O  O36  1  0.001  0.818  0.759  1.0
  O  O37  1  0.485  0.145  0.237  1.0
  O  O38  1  0.855  0.340  0.237  1.0
  O  O39  1  0.660  0.515  0.237  1.0
  O  O40  1  0.333  0.667  0.868  1.0
[/CIF]
.
The compound described by Sr10(PO4)6O crystallizes in the trigonal P3 space group. There are six inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to three equivalent O(6) and three equivalent O(7) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to three equivalent O(4), three equivalent O(5), and three equivalent O(8) atoms. In the third Sr site, Sr(3) is bonded in a 6-coordinate geometry to three equivalent O(5) and three equivalent O(8) atoms. In the fourth Sr site, Sr(4) is bonded in a 9-coordinate geometry to three equivalent O(2), three equivalent O(6), and three equivalent O(7) atoms. In the fifth Sr site, Sr(5) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(7), and one O(9) atom. In the sixth Sr site, Sr(6) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), one O(6), one O(8), and two equivalent O(3) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(1), one O(4), one O(5), and one O(7) atom. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(2), one O(3), one O(6), and one O(8) atom. There are nine inequivalent O sites. In the first O site, O(7) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(4), one Sr(5), and one P(1) atom. In the second O site, O(8) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(3), one Sr(6), and one P(2) atom. In the third O site, O(9) is bonded in a trigonal non-coplanar geometry to three equivalent Sr(5) atoms. In the fourth O site, O(1) is bonded in a distorted single-bond geometry to one Sr(5), one Sr(6), and one P(1) atom. In the fifth O site, O(2) is bonded in a 4-coordinate geometry to one Sr(4), one Sr(5), one Sr(6), and one P(2) atom. In the sixth O site, O(3) is bonded in a distorted single-bond geometry to one Sr(5), two equivalent Sr(6), and one P(2) atom. In the seventh O site, O(4) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(5), one Sr(6), and one P(1) atom. In the eighth O site, O(5) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(3), one Sr(5), and one P(1) atom. In the ninth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(4), one Sr(6), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr10P6O25
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.731
_cell_length_b   9.731
_cell_length_c   7.250
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   594.520
_cell_formula_units_Z   1
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  Sr0  1  1.000  1.000  0.521  1.0
  Sr  Sr1  1  0.667  0.333  0.981  1.0
  Sr  Sr2  1  0.667  0.333  0.487  1.0
  Sr  Sr3  1  0.000  0.000  0.013  1.0
  Sr  Sr4  1  0.109  0.430  0.759  1.0
  Sr  Sr5  1  0.570  0.679  0.759  1.0
  Sr  Sr6  1  0.321  0.891  0.759  1.0
  Sr  Sr7  1  0.586  0.935  0.242  1.0
  Sr  Sr8  1  0.065  0.651  0.242  1.0
  Sr  Sr9  1  0.349  0.414  0.242  1.0
  P  P10  1  0.363  0.292  0.746  1.0
  P  P11  1  0.708  0.071  0.746  1.0
  P  P12  1  0.929  0.637  0.746  1.0
  P  P13  1  0.305  0.029  0.251  1.0
  P  P14  1  0.971  0.276  0.251  1.0
  P  P15  1  0.724  0.695  0.251  1.0
  O  O16  1  0.404  0.408  0.584  1.0
  O  O17  1  0.592  0.996  0.584  1.0
  O  O18  1  0.004  0.596  0.584  1.0
  O  O19  1  0.236  0.934  0.071  1.0
  O  O20  1  0.066  0.303  0.071  1.0
  O  O21  1  0.697  0.764  0.071  1.0
  O  O22  1  0.272  0.906  0.403  1.0
  O  O23  1  0.094  0.366  0.403  1.0
  O  O24  1  0.634  0.728  0.403  1.0
  O  O25  1  0.428  0.388  0.926  1.0
  O  O26  1  0.612  0.040  0.926  1.0
  O  O27  1  0.960  0.572  0.926  1.0
  O  O28  1  0.448  0.195  0.720  1.0
  O  O29  1  0.805  0.252  0.720  1.0
  O  O30  1  0.748  0.552  0.720  1.0
  O  O31  1  0.218  0.122  0.286  1.0
  O  O32  1  0.878  0.096  0.286  1.0
  O  O33  1  0.904  0.782  0.286  1.0
  O  O34  1  0.182  0.184  0.759  1.0
  O  O35  1  0.816  0.999  0.759  1.0
  O  O36  1  0.001  0.818  0.759  1.0
  O  O37  1  0.485  0.145  0.237  1.0
  O  O38  1  0.855  0.340  0.237  1.0
  O  O39  1  0.660  0.515  0.237  1.0
  O  O40  1  0.333  0.667  0.868  1.0
[/CIF]
.