The material described by Sr2MgZn2Sn2(PO4)4 crystallizes in the triclinic P-1 space group. Sr(1) is bonded to one O(2), one O(3), one O(8), two equivalent O(1), and two equivalent O(6) atoms to form distorted SrO7 pentagonal bipyramids that share corners with two equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, edges with two equivalent Sr(1)O7 pentagonal bipyramids, and  an edgeedge with one P(1)O4 tetrahedra. Mg(1) is bonded in a distorted square co-planar geometry to two equivalent O(4) and two equivalent O(5) atoms. Zn(1) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(7) atom. Sn(1) is bonded in a 3-coordinate geometry to one O(3), one O(5), and one O(7) atom. 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 corners with two equivalent Sr(1)O7 pentagonal bipyramids and  an edgeedge with one Sr(1)O7 pentagonal bipyramid. 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 Sr(1)O7 pentagonal bipyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Sr(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 Zn(1), and one P(1) atom. In the third O site, O(3) is bonded in a 2-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 distorted T-shaped geometry to one Mg(1), one Zn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Sn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Zn(1), one Sn(1), and one P(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Sr(1) and one P(2) atom. is represented by the CIF card [CIF]
data_Sr2MgZn2Sn2(PO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.608
_cell_length_b   7.904
_cell_length_c   9.737
_cell_angle_alpha   107.020
_cell_angle_beta   103.163
_cell_angle_gamma   86.480
_symmetry_Int_Tables_number   1
_cell_volume   401.848
_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  0.123  0.745  0.983  1.0
  Sr  Sr1  1  0.877  0.255  0.017  1.0
  Mg  Mg2  1  0.000  0.000  0.500  1.0
  Zn  Zn3  1  0.030  0.435  0.603  1.0
  Zn  Zn4  1  0.970  0.565  0.397  1.0
  Sn  Sn5  1  0.592  0.819  0.575  1.0
  Sn  Sn6  1  0.408  0.181  0.425  1.0
  P  P7  1  0.406  0.474  0.241  1.0
  P  P8  1  0.594  0.526  0.759  1.0
  P  P9  1  0.738  0.935  0.229  1.0
  P  P10  1  0.262  0.065  0.771  1.0
  O  O11  1  0.770  0.497  0.895  1.0
  O  O12  1  0.677  0.456  0.228  1.0
  O  O13  1  0.691  0.705  0.747  1.0
  O  O14  1  0.086  0.189  0.692  1.0
  O  O15  1  0.323  0.544  0.772  1.0
  O  O16  1  0.242  0.886  0.631  1.0
  O  O17  1  0.758  0.114  0.369  1.0
  O  O18  1  0.152  0.025  0.888  1.0
  O  O19  1  0.309  0.295  0.253  1.0
  O  O20  1  0.848  0.975  0.112  1.0
  O  O21  1  0.230  0.503  0.105  1.0
  O  O22  1  0.371  0.617  0.388  1.0
  O  O23  1  0.629  0.383  0.612  1.0
  O  O24  1  0.470  0.882  0.186  1.0
  O  O25  1  0.914  0.811  0.308  1.0
  O  O26  1  0.530  0.118  0.814  1.0
[/CIF]
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The material described by Sr2MgZn2Sn2(PO4)4 crystallizes in the triclinic P-1 space group. Sr(1) is bonded to one O(2), one O(3), one O(8), two equivalent O(1), and two equivalent O(6) atoms to form distorted SrO7 pentagonal bipyramids that share corners with two equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, edges with two equivalent Sr(1)O7 pentagonal bipyramids, and  an edgeedge with one P(1)O4 tetrahedra. Mg(1) is bonded in a distorted square co-planar geometry to two equivalent O(4) and two equivalent O(5) atoms. Zn(1) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(7) atom. Sn(1) is bonded in a 3-coordinate geometry to one O(3), one O(5), and one O(7) atom. 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 corners with two equivalent Sr(1)O7 pentagonal bipyramids and  an edgeedge with one Sr(1)O7 pentagonal bipyramid. 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 Sr(1)O7 pentagonal bipyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Sr(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 Zn(1), and one P(1) atom. In the third O site, O(3) is bonded in a 2-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 distorted T-shaped geometry to one Mg(1), one Zn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Sn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Zn(1), one Sn(1), and one P(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Sr(1) and one P(2) atom. is represented by the CIF card [CIF]
data_Sr2MgZn2Sn2(PO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.608
_cell_length_b   7.904
_cell_length_c   9.737
_cell_angle_alpha   107.020
_cell_angle_beta   103.163
_cell_angle_gamma   86.480
_symmetry_Int_Tables_number   1
_cell_volume   401.848
_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  0.123  0.745  0.983  1.0
  Sr  Sr1  1  0.877  0.255  0.017  1.0
  Mg  Mg2  1  0.000  0.000  0.500  1.0
  Zn  Zn3  1  0.030  0.435  0.603  1.0
  Zn  Zn4  1  0.970  0.565  0.397  1.0
  Sn  Sn5  1  0.592  0.819  0.575  1.0
  Sn  Sn6  1  0.408  0.181  0.425  1.0
  P  P7  1  0.406  0.474  0.241  1.0
  P  P8  1  0.594  0.526  0.759  1.0
  P  P9  1  0.738  0.935  0.229  1.0
  P  P10  1  0.262  0.065  0.771  1.0
  O  O11  1  0.770  0.497  0.895  1.0
  O  O12  1  0.677  0.456  0.228  1.0
  O  O13  1  0.691  0.705  0.747  1.0
  O  O14  1  0.086  0.189  0.692  1.0
  O  O15  1  0.323  0.544  0.772  1.0
  O  O16  1  0.242  0.886  0.631  1.0
  O  O17  1  0.758  0.114  0.369  1.0
  O  O18  1  0.152  0.025  0.888  1.0
  O  O19  1  0.309  0.295  0.253  1.0
  O  O20  1  0.848  0.975  0.112  1.0
  O  O21  1  0.230  0.503  0.105  1.0
  O  O22  1  0.371  0.617  0.388  1.0
  O  O23  1  0.629  0.383  0.612  1.0
  O  O24  1  0.470  0.882  0.186  1.0
  O  O25  1  0.914  0.811  0.308  1.0
  O  O26  1  0.530  0.118  0.814  1.0
[/CIF]
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