The material structure described by SrCaSn(PO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(4), one O(8), two equivalent O(1), and two equivalent O(6) atoms. Ca(1) is bonded to one O(1), one O(2), one O(4), one O(7), and two equivalent O(5) atoms to form distorted CaO6 pentagonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra,  an edgeedge with one Ca(1)O6 pentagonal pyramid, and  an edgeedge with one P(1)O4 tetrahedra. Sn(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(5), one O(8), and two equivalent O(7) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Ca(1)O6 pentagonal pyramid and  an edgeedge with one Ca(1)O6 pentagonal pyramid. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share corners with three equivalent Ca(1)O6 pentagonal pyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond 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 planar geometry to one Sr(1), one Ca(1), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(1), one Sn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(1), one Ca(1), one Sn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to two equivalent Ca(1), one Sn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a 1-coordinate geometry to two equivalent Sr(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a 1-coordinate geometry to one Ca(1), two equivalent Sn(1), and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Sr(1), 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  0.789  0.045  1.0
  Sr  Sr1  1  0.736  0.211  0.955  1.0
  Ca  Ca2  1  0.035  0.422  0.666  1.0
  Ca  Ca3  1  0.965  0.578  0.334  1.0
  Sn  Sn4  1  0.634  0.836  0.591  1.0
  Sn  Sn5  1  0.366  0.164  0.409  1.0
  P  P6  1  0.357  0.398  0.203  1.0
  P  P7  1  0.643  0.602  0.797  1.0
  P  P8  1  0.817  0.026  0.274  1.0
  P  P9  1  0.183  0.974  0.726  1.0
  O  O10  1  0.862  0.546  0.883  1.0
  O  O11  1  0.597  0.453  0.164  1.0
  O  O12  1  0.693  0.835  0.811  1.0
  O  O13  1  0.978  0.103  0.702  1.0
  O  O14  1  0.403  0.547  0.836  1.0
  O  O15  1  0.088  0.747  0.615  1.0
  O  O16  1  0.912  0.253  0.385  1.0
  O  O17  1  0.239  0.981  0.877  1.0
  O  O18  1  0.307  0.165  0.189  1.0
  O  O19  1  0.761  0.019  0.123  1.0
  O  O20  1  0.138  0.454  0.117  1.0
  O  O21  1  0.366  0.516  0.361  1.0
  O  O22  1  0.634  0.484  0.639  1.0
  O  O23  1  0.585  0.925  0.306  1.0
  O  O24  1  0.022  0.897  0.298  1.0
  O  O25  1  0.415  0.075  0.694  1.0
[/CIF]
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The material structure described by SrCaSn(PO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(4), one O(8), two equivalent O(1), and two equivalent O(6) atoms. Ca(1) is bonded to one O(1), one O(2), one O(4), one O(7), and two equivalent O(5) atoms to form distorted CaO6 pentagonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra,  an edgeedge with one Ca(1)O6 pentagonal pyramid, and  an edgeedge with one P(1)O4 tetrahedra. Sn(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(5), one O(8), and two equivalent O(7) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Ca(1)O6 pentagonal pyramid and  an edgeedge with one Ca(1)O6 pentagonal pyramid. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share corners with three equivalent Ca(1)O6 pentagonal pyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond 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 planar geometry to one Sr(1), one Ca(1), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(1), one Sn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(1), one Ca(1), one Sn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to two equivalent Ca(1), one Sn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a 1-coordinate geometry to two equivalent Sr(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a 1-coordinate geometry to one Ca(1), two equivalent Sn(1), and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Sr(1), 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  0.789  0.045  1.0
  Sr  Sr1  1  0.736  0.211  0.955  1.0
  Ca  Ca2  1  0.035  0.422  0.666  1.0
  Ca  Ca3  1  0.965  0.578  0.334  1.0
  Sn  Sn4  1  0.634  0.836  0.591  1.0
  Sn  Sn5  1  0.366  0.164  0.409  1.0
  P  P6  1  0.357  0.398  0.203  1.0
  P  P7  1  0.643  0.602  0.797  1.0
  P  P8  1  0.817  0.026  0.274  1.0
  P  P9  1  0.183  0.974  0.726  1.0
  O  O10  1  0.862  0.546  0.883  1.0
  O  O11  1  0.597  0.453  0.164  1.0
  O  O12  1  0.693  0.835  0.811  1.0
  O  O13  1  0.978  0.103  0.702  1.0
  O  O14  1  0.403  0.547  0.836  1.0
  O  O15  1  0.088  0.747  0.615  1.0
  O  O16  1  0.912  0.253  0.385  1.0
  O  O17  1  0.239  0.981  0.877  1.0
  O  O18  1  0.307  0.165  0.189  1.0
  O  O19  1  0.761  0.019  0.123  1.0
  O  O20  1  0.138  0.454  0.117  1.0
  O  O21  1  0.366  0.516  0.361  1.0
  O  O22  1  0.634  0.484  0.639  1.0
  O  O23  1  0.585  0.925  0.306  1.0
  O  O24  1  0.022  0.897  0.298  1.0
  O  O25  1  0.415  0.075  0.694  1.0
[/CIF]
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