The compound described by Sr5P3O13 crystallizes in the hexagonal P6_3/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(3), and three equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded to one O(1), one O(2), one O(3), and four equivalent O(4) atoms to form distorted SrO7 pentagonal bipyramids that share corners with six equivalent Sr(2)O7 pentagonal bipyramids, corners with four equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(3), and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with four equivalent Sr(2)O7 pentagonal bipyramids and  an edgeedge with one Sr(2)O7 pentagonal bipyramid. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sr(2), two equivalent Sr(1), and one P(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent Sr(2) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Sr(1), two equivalent Sr(2), and one P(1) atom. is represented by the CIF file [CIF]
data_Sr5P3O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.786
_cell_length_b   9.786
_cell_length_c   7.292
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   604.781
_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  0.667  0.333  1.000  1.0
  Sr  Sr1  1  0.333  0.667  0.000  1.0
  Sr  Sr2  1  0.333  0.667  0.500  1.0
  Sr  Sr3  1  0.667  0.333  0.500  1.0
  Sr  Sr4  1  0.754  0.015  0.750  1.0
  Sr  Sr5  1  0.246  0.985  0.250  1.0
  Sr  Sr6  1  0.261  0.246  0.750  1.0
  Sr  Sr7  1  0.739  0.754  0.250  1.0
  Sr  Sr8  1  0.985  0.739  0.750  1.0
  Sr  Sr9  1  0.015  0.261  0.250  1.0
  P  P10  1  0.600  0.633  0.750  1.0
  P  P11  1  0.400  0.367  0.250  1.0
  P  P12  1  0.034  0.400  0.750  1.0
  P  P13  1  0.966  0.600  0.250  1.0
  P  P14  1  0.367  0.966  0.750  1.0
  P  P15  1  0.633  0.034  0.250  1.0
  O  O16  1  0.853  0.333  0.750  1.0
  O  O17  1  0.147  0.667  0.250  1.0
  O  O18  1  0.480  0.147  0.750  1.0
  O  O19  1  0.520  0.853  0.250  1.0
  O  O20  1  0.667  0.520  0.750  1.0
  O  O21  1  0.333  0.480  0.250  1.0
  O  O22  1  1.000  1.000  0.750  1.0
  O  O23  1  0.000  0.000  0.250  1.0
  O  O24  1  0.418  0.539  0.750  1.0
  O  O25  1  0.583  0.461  0.250  1.0
  O  O26  1  0.121  0.582  0.750  1.0
  O  O27  1  0.879  0.417  0.250  1.0
  O  O28  1  0.461  0.879  0.750  1.0
  O  O29  1  0.539  0.121  0.250  1.0
  O  O30  1  0.654  0.739  0.921  1.0
  O  O31  1  0.346  0.261  0.079  1.0
  O  O32  1  0.086  0.346  0.921  1.0
  O  O33  1  0.346  0.261  0.421  1.0
  O  O34  1  0.914  0.654  0.079  1.0
  O  O35  1  0.654  0.739  0.579  1.0
  O  O36  1  0.261  0.914  0.921  1.0
  O  O37  1  0.914  0.654  0.421  1.0
  O  O38  1  0.739  0.086  0.079  1.0
  O  O39  1  0.086  0.346  0.579  1.0
  O  O40  1  0.739  0.086  0.421  1.0
  O  O41  1  0.261  0.914  0.579  1.0
[/CIF]
.
The compound described by Sr5P3O13 crystallizes in the hexagonal P6_3/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(3), and three equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded to one O(1), one O(2), one O(3), and four equivalent O(4) atoms to form distorted SrO7 pentagonal bipyramids that share corners with six equivalent Sr(2)O7 pentagonal bipyramids, corners with four equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(3), and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with four equivalent Sr(2)O7 pentagonal bipyramids and  an edgeedge with one Sr(2)O7 pentagonal bipyramid. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sr(2), two equivalent Sr(1), and one P(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent Sr(2) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Sr(1), two equivalent Sr(2), and one P(1) atom. is represented by the CIF file [CIF]
data_Sr5P3O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.786
_cell_length_b   9.786
_cell_length_c   7.292
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   604.781
_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  0.667  0.333  1.000  1.0
  Sr  Sr1  1  0.333  0.667  0.000  1.0
  Sr  Sr2  1  0.333  0.667  0.500  1.0
  Sr  Sr3  1  0.667  0.333  0.500  1.0
  Sr  Sr4  1  0.754  0.015  0.750  1.0
  Sr  Sr5  1  0.246  0.985  0.250  1.0
  Sr  Sr6  1  0.261  0.246  0.750  1.0
  Sr  Sr7  1  0.739  0.754  0.250  1.0
  Sr  Sr8  1  0.985  0.739  0.750  1.0
  Sr  Sr9  1  0.015  0.261  0.250  1.0
  P  P10  1  0.600  0.633  0.750  1.0
  P  P11  1  0.400  0.367  0.250  1.0
  P  P12  1  0.034  0.400  0.750  1.0
  P  P13  1  0.966  0.600  0.250  1.0
  P  P14  1  0.367  0.966  0.750  1.0
  P  P15  1  0.633  0.034  0.250  1.0
  O  O16  1  0.853  0.333  0.750  1.0
  O  O17  1  0.147  0.667  0.250  1.0
  O  O18  1  0.480  0.147  0.750  1.0
  O  O19  1  0.520  0.853  0.250  1.0
  O  O20  1  0.667  0.520  0.750  1.0
  O  O21  1  0.333  0.480  0.250  1.0
  O  O22  1  1.000  1.000  0.750  1.0
  O  O23  1  0.000  0.000  0.250  1.0
  O  O24  1  0.418  0.539  0.750  1.0
  O  O25  1  0.583  0.461  0.250  1.0
  O  O26  1  0.121  0.582  0.750  1.0
  O  O27  1  0.879  0.417  0.250  1.0
  O  O28  1  0.461  0.879  0.750  1.0
  O  O29  1  0.539  0.121  0.250  1.0
  O  O30  1  0.654  0.739  0.921  1.0
  O  O31  1  0.346  0.261  0.079  1.0
  O  O32  1  0.086  0.346  0.921  1.0
  O  O33  1  0.346  0.261  0.421  1.0
  O  O34  1  0.914  0.654  0.079  1.0
  O  O35  1  0.654  0.739  0.579  1.0
  O  O36  1  0.261  0.914  0.921  1.0
  O  O37  1  0.914  0.654  0.421  1.0
  O  O38  1  0.739  0.086  0.079  1.0
  O  O39  1  0.086  0.346  0.579  1.0
  O  O40  1  0.739  0.086  0.421  1.0
  O  O41  1  0.261  0.914  0.579  1.0
[/CIF]
.