The material structure described by SrCaSn(PO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 1-coordinate geometry to one O(2), one O(3), one O(6), and two equivalent O(1) atoms. Ca(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom. Sn(1) is bonded in a 3-coordinate geometry to one O(4), one O(7), and one O(8) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(7) atom. In the second P site, P(2) is bonded in a 4-coordinate geometry to one O(4), one O(5), one O(6), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Ca(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Ca(1), and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one P(1), and one O(7) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Ca(1), one Sn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one Ca(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Sr(1), one Ca(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Ca(1), one Sn(1), one P(1), and one O(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrCaSn(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.718
_cell_length_b   6.926
_cell_length_c   10.370
_cell_angle_alpha   108.589
_cell_angle_beta   100.530
_cell_angle_gamma   96.709
_symmetry_Int_Tables_number   1
_cell_volume   375.922
_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  0.264  0.743  0.045  1.0
  Sr  Sr1  1  0.736  0.257  0.955  1.0
  Ca  Ca2  1  0.035  0.755  0.666  1.0
  Ca  Ca3  1  0.965  0.245  0.334  1.0
  Sn  Sn4  1  0.634  0.245  0.591  1.0
  Sn  Sn5  1  0.366  0.755  0.409  1.0
  P  P6  1  0.357  0.195  0.203  1.0
  P  P7  1  0.643  0.805  0.797  1.0
  P  P8  1  0.817  0.752  0.274  1.0
  P  P9  1  0.183  0.248  0.726  1.0
  O  O10  1  0.862  0.664  0.883  1.0
  O  O11  1  0.597  0.289  0.164  1.0
  O  O12  1  0.693  0.025  0.811  1.0
  O  O13  1  0.978  0.400  0.702  1.0
  O  O14  1  0.403  0.711  0.836  1.0
  O  O15  1  0.088  0.132  0.615  1.0
  O  O16  1  0.912  0.868  0.385  1.0
  O  O17  1  0.239  0.104  0.877  1.0
  O  O18  1  0.307  0.975  0.189  1.0
  O  O19  1  0.761  0.896  0.123  1.0
  O  O20  1  0.138  0.336  0.117  1.0
  O  O21  1  0.366  0.155  0.361  1.0
  O  O22  1  0.634  0.845  0.639  1.0
  O  O23  1  0.585  0.619  0.306  1.0
  O  O24  1  0.022  0.600  0.298  1.0
  O  O25  1  0.415  0.381  0.694  1.0
[/CIF]
.
The material structure described by SrCaSn(PO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 1-coordinate geometry to one O(2), one O(3), one O(6), and two equivalent O(1) atoms. Ca(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom. Sn(1) is bonded in a 3-coordinate geometry to one O(4), one O(7), and one O(8) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(7) atom. In the second P site, P(2) is bonded in a 4-coordinate geometry to one O(4), one O(5), one O(6), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Ca(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Ca(1), and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one P(1), and one O(7) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Ca(1), one Sn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one Ca(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Sr(1), one Ca(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Ca(1), one Sn(1), one P(1), and one O(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrCaSn(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.718
_cell_length_b   6.926
_cell_length_c   10.370
_cell_angle_alpha   108.589
_cell_angle_beta   100.530
_cell_angle_gamma   96.709
_symmetry_Int_Tables_number   1
_cell_volume   375.922
_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  0.264  0.743  0.045  1.0
  Sr  Sr1  1  0.736  0.257  0.955  1.0
  Ca  Ca2  1  0.035  0.755  0.666  1.0
  Ca  Ca3  1  0.965  0.245  0.334  1.0
  Sn  Sn4  1  0.634  0.245  0.591  1.0
  Sn  Sn5  1  0.366  0.755  0.409  1.0
  P  P6  1  0.357  0.195  0.203  1.0
  P  P7  1  0.643  0.805  0.797  1.0
  P  P8  1  0.817  0.752  0.274  1.0
  P  P9  1  0.183  0.248  0.726  1.0
  O  O10  1  0.862  0.664  0.883  1.0
  O  O11  1  0.597  0.289  0.164  1.0
  O  O12  1  0.693  0.025  0.811  1.0
  O  O13  1  0.978  0.400  0.702  1.0
  O  O14  1  0.403  0.711  0.836  1.0
  O  O15  1  0.088  0.132  0.615  1.0
  O  O16  1  0.912  0.868  0.385  1.0
  O  O17  1  0.239  0.104  0.877  1.0
  O  O18  1  0.307  0.975  0.189  1.0
  O  O19  1  0.761  0.896  0.123  1.0
  O  O20  1  0.138  0.336  0.117  1.0
  O  O21  1  0.366  0.155  0.361  1.0
  O  O22  1  0.634  0.845  0.639  1.0
  O  O23  1  0.585  0.619  0.306  1.0
  O  O24  1  0.022  0.600  0.298  1.0
  O  O25  1  0.415  0.381  0.694  1.0
[/CIF]
.