The compound described by Sr2P6O17 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(13), one O(14), one O(17), one O(2), one O(3), and one O(7) atom. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(13), one O(17), one O(4), one O(6), and one O(7) atom. There are six inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(16), one O(2), and one O(3) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(3), one O(4), one O(5), and one O(9) atom to form corner-sharing PO4 tetrahedra. In the third P site, P(3) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form corner-sharing PO4 tetrahedra. In the fourth P site, P(4) is bonded to one O(15), one O(16), one O(17), and one O(8) atom to form corner-sharing PO4 tetrahedra. In the fifth P site, P(5) is bonded to one O(12), one O(13), one O(14), and one O(15) atom to form corner-sharing PO4 tetrahedra. In the sixth P site, P(6) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form corner-sharing PO4 tetrahedra. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sr(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Sr(1), one P(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Sr(2) and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one P(2) and one P(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Sr(2) and one P(3) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(3) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one P(3) and one P(4) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one P(2) and one P(6) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(6) atom. In the eleventh O site, O(11) is bonded in a distorted bent 150 degrees geometry to one Sr(2) and one P(6) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one P(5) and one P(6) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(5) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 150 degrees geometry to one Sr(1) and one P(5) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one P(4) and one P(5) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one P(1) and one P(4) atom. In the seventeenth O site, O(17) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(4) atom. is represented by the CIF card [CIF]
data_Sr2P6O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.287
_cell_length_b   7.166
_cell_length_c   7.179
_cell_angle_alpha   74.667
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   659.175
_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  Sr0  1  0.218  0.190  0.121  1.0
  Sr  Sr1  1  0.718  0.810  0.879  1.0
  Sr  Sr2  1  0.004  0.786  0.170  1.0
  Sr  Sr3  1  0.504  0.214  0.830  1.0
  P  P4  1  0.252  0.322  0.618  1.0
  P  P5  1  0.752  0.678  0.382  1.0
  P  P6  1  0.037  0.340  0.615  1.0
  P  P7  1  0.537  0.660  0.385  1.0
  P  P8  1  0.938  0.986  0.603  1.0
  P  P9  1  0.438  0.014  0.397  1.0
  P  P10  1  0.758  0.244  0.478  1.0
  P  P11  1  0.258  0.756  0.522  1.0
  P  P12  1  0.726  0.259  0.055  1.0
  P  P13  1  0.226  0.741  0.945  1.0
  P  P14  1  0.948  0.319  0.001  1.0
  P  P15  1  0.448  0.681  0.999  1.0
  O  O16  1  0.314  0.244  0.791  1.0
  O  O17  1  0.814  0.756  0.209  1.0
  O  O18  1  0.239  0.225  0.464  1.0
  O  O19  1  0.739  0.775  0.536  1.0
  O  O20  1  0.142  0.351  0.713  1.0
  O  O21  1  0.642  0.649  0.287  1.0
  O  O22  1  0.026  0.480  0.428  1.0
  O  O23  1  0.526  0.520  0.572  1.0
  O  O24  1  0.033  0.124  0.608  1.0
  O  O25  1  0.533  0.876  0.392  1.0
  O  O26  1  0.967  0.853  0.489  1.0
  O  O27  1  0.467  0.147  0.511  1.0
  O  O28  1  0.897  0.921  0.802  1.0
  O  O29  1  0.397  0.079  0.198  1.0
  O  O30  1  0.864  0.152  0.471  1.0
  O  O31  1  0.364  0.848  0.529  1.0
  O  O32  1  0.457  0.637  0.234  1.0
  O  O33  1  0.957  0.363  0.766  1.0
  O  O34  1  0.525  0.829  0.912  1.0
  O  O35  1  0.025  0.171  0.088  1.0
  O  O36  1  0.442  0.493  0.955  1.0
  O  O37  1  0.942  0.507  0.045  1.0
  O  O38  1  0.342  0.792  0.963  1.0
  O  O39  1  0.842  0.208  0.037  1.0
  O  O40  1  0.165  0.908  0.969  1.0
  O  O41  1  0.665  0.092  0.031  1.0
  O  O42  1  0.200  0.545  0.062  1.0
  O  O43  1  0.700  0.455  0.938  1.0
  O  O44  1  0.212  0.743  0.722  1.0
  O  O45  1  0.712  0.257  0.278  1.0
  O  O46  1  0.283  0.543  0.520  1.0
  O  O47  1  0.783  0.457  0.480  1.0
  O  O48  1  0.193  0.852  0.360  1.0
  O  O49  1  0.693  0.148  0.640  1.0
[/CIF]
.
The compound described by Sr2P6O17 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(13), one O(14), one O(17), one O(2), one O(3), and one O(7) atom. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(13), one O(17), one O(4), one O(6), and one O(7) atom. There are six inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(16), one O(2), and one O(3) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(3), one O(4), one O(5), and one O(9) atom to form corner-sharing PO4 tetrahedra. In the third P site, P(3) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form corner-sharing PO4 tetrahedra. In the fourth P site, P(4) is bonded to one O(15), one O(16), one O(17), and one O(8) atom to form corner-sharing PO4 tetrahedra. In the fifth P site, P(5) is bonded to one O(12), one O(13), one O(14), and one O(15) atom to form corner-sharing PO4 tetrahedra. In the sixth P site, P(6) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form corner-sharing PO4 tetrahedra. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sr(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Sr(1), one P(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Sr(2) and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one P(2) and one P(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Sr(2) and one P(3) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(3) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one P(3) and one P(4) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one P(2) and one P(6) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(6) atom. In the eleventh O site, O(11) is bonded in a distorted bent 150 degrees geometry to one Sr(2) and one P(6) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one P(5) and one P(6) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(5) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 150 degrees geometry to one Sr(1) and one P(5) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one P(4) and one P(5) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one P(1) and one P(4) atom. In the seventeenth O site, O(17) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(4) atom. is represented by the CIF card [CIF]
data_Sr2P6O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.287
_cell_length_b   7.166
_cell_length_c   7.179
_cell_angle_alpha   74.667
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   659.175
_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  Sr0  1  0.218  0.190  0.121  1.0
  Sr  Sr1  1  0.718  0.810  0.879  1.0
  Sr  Sr2  1  0.004  0.786  0.170  1.0
  Sr  Sr3  1  0.504  0.214  0.830  1.0
  P  P4  1  0.252  0.322  0.618  1.0
  P  P5  1  0.752  0.678  0.382  1.0
  P  P6  1  0.037  0.340  0.615  1.0
  P  P7  1  0.537  0.660  0.385  1.0
  P  P8  1  0.938  0.986  0.603  1.0
  P  P9  1  0.438  0.014  0.397  1.0
  P  P10  1  0.758  0.244  0.478  1.0
  P  P11  1  0.258  0.756  0.522  1.0
  P  P12  1  0.726  0.259  0.055  1.0
  P  P13  1  0.226  0.741  0.945  1.0
  P  P14  1  0.948  0.319  0.001  1.0
  P  P15  1  0.448  0.681  0.999  1.0
  O  O16  1  0.314  0.244  0.791  1.0
  O  O17  1  0.814  0.756  0.209  1.0
  O  O18  1  0.239  0.225  0.464  1.0
  O  O19  1  0.739  0.775  0.536  1.0
  O  O20  1  0.142  0.351  0.713  1.0
  O  O21  1  0.642  0.649  0.287  1.0
  O  O22  1  0.026  0.480  0.428  1.0
  O  O23  1  0.526  0.520  0.572  1.0
  O  O24  1  0.033  0.124  0.608  1.0
  O  O25  1  0.533  0.876  0.392  1.0
  O  O26  1  0.967  0.853  0.489  1.0
  O  O27  1  0.467  0.147  0.511  1.0
  O  O28  1  0.897  0.921  0.802  1.0
  O  O29  1  0.397  0.079  0.198  1.0
  O  O30  1  0.864  0.152  0.471  1.0
  O  O31  1  0.364  0.848  0.529  1.0
  O  O32  1  0.457  0.637  0.234  1.0
  O  O33  1  0.957  0.363  0.766  1.0
  O  O34  1  0.525  0.829  0.912  1.0
  O  O35  1  0.025  0.171  0.088  1.0
  O  O36  1  0.442  0.493  0.955  1.0
  O  O37  1  0.942  0.507  0.045  1.0
  O  O38  1  0.342  0.792  0.963  1.0
  O  O39  1  0.842  0.208  0.037  1.0
  O  O40  1  0.165  0.908  0.969  1.0
  O  O41  1  0.665  0.092  0.031  1.0
  O  O42  1  0.200  0.545  0.062  1.0
  O  O43  1  0.700  0.455  0.938  1.0
  O  O44  1  0.212  0.743  0.722  1.0
  O  O45  1  0.712  0.257  0.278  1.0
  O  O46  1  0.283  0.543  0.520  1.0
  O  O47  1  0.783  0.457  0.480  1.0
  O  O48  1  0.193  0.852  0.360  1.0
  O  O49  1  0.693  0.148  0.640  1.0
[/CIF]
.