The material structure described by Sr2Ni2Zn(PO4)4 crystallizes in the triclinic P1 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(11), one O(14), one O(15), one O(5), one O(8), and one O(9) 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(16), one O(2), one O(3), one O(4), and one O(8) atom. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(12), one O(14), one O(16), one O(3), one O(4), and one O(6) atom to form NiO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  an edgeedge with one Ni(2)O6 octahedra, and  an edgeedge with one P(4)O4 tetrahedra. In the second Ni site, Ni(2) is bonded to one O(13), one O(14), one O(15), one O(16), one O(7), and one O(9) atom to form NiO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra, and  an edgeedge with one P(3)O4 tetrahedra. Zn(1) is bonded in a 4-coordinate geometry to one O(13), one O(5), one O(6), and one O(7) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(12), one O(2), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Ni(1)O6 octahedra and  a cornercorner with one Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-53°. In the second P site, P(2) is bonded to one O(1), one O(13), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Ni(1)O6 octahedra and  a cornercorner with one Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-56°. In the third P site, P(3) is bonded to one O(10), one O(14), one O(15), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Ni(1)O6 octahedra,  a cornercorner with one Ni(2)O6 octahedra, and  an edgeedge with one Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-55°. In the fourth P site, P(4) is bonded to one O(16), one O(4), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Ni(1)O6 octahedra,  a cornercorner with one Ni(2)O6 octahedra, and  an edgeedge with one Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-55°. There are sixteen 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(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sr(2) and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(2), one Ni(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Sr(2), one Ni(1), and one P(4) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(1), one Zn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Ni(1), one Zn(1), and one P(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Ni(2), one Zn(1), and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Sr(1), one Ni(2), and one P(1) 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(3) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one P(1) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one P(1) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Ni(2), one Zn(1), and one P(2) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Sr(1), one Ni(1), one Ni(2), and one P(3) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Sr(1), one Ni(2), and one P(3) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Sr(2), one Ni(1), one Ni(2), and one P(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2ZnNi2(PO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.551
_cell_length_b   6.885
_cell_length_c   9.240
_cell_angle_alpha   110.266
_cell_angle_beta   101.497
_cell_angle_gamma   98.408
_symmetry_Int_Tables_number   1
_cell_volume   315.566
_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  0.254  0.795  0.059  1.0
  Sr  Sr1  1  0.742  0.205  0.946  1.0
  Zn  Zn2  1  0.994  0.448  0.634  1.0
  Ni  Ni3  1  0.658  0.845  0.554  1.0
  Ni  Ni4  1  0.352  0.138  0.444  1.0
  P  P5  1  0.396  0.424  0.238  1.0
  P  P6  1  0.594  0.573  0.762  1.0
  P  P7  1  0.849  0.025  0.303  1.0
  P  P8  1  0.157  0.970  0.702  1.0
  O  O9  1  0.813  0.560  0.888  1.0
  O  O10  1  0.635  0.463  0.183  1.0
  O  O11  1  0.639  0.795  0.755  1.0
  O  O12  1  0.952  0.105  0.692  1.0
  O  O13  1  0.333  0.518  0.794  1.0
  O  O14  1  0.005  0.737  0.597  1.0
  O  O15  1  0.008  0.252  0.424  1.0
  O  O16  1  0.272  0.010  0.877  1.0
  O  O17  1  0.358  0.201  0.248  1.0
  O  O18  1  0.739  0.002  0.132  1.0
  O  O19  1  0.173  0.437  0.114  1.0
  O  O20  1  0.399  0.595  0.400  1.0
  O  O21  1  0.608  0.401  0.598  1.0
  O  O22  1  0.626  0.951  0.368  1.0
  O  O23  1  0.057  0.894  0.305  1.0
  O  O24  1  0.375  0.038  0.630  1.0
[/CIF]
.
The material structure described by Sr2Ni2Zn(PO4)4 crystallizes in the triclinic P1 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(11), one O(14), one O(15), one O(5), one O(8), and one O(9) 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(16), one O(2), one O(3), one O(4), and one O(8) atom. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(12), one O(14), one O(16), one O(3), one O(4), and one O(6) atom to form NiO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  an edgeedge with one Ni(2)O6 octahedra, and  an edgeedge with one P(4)O4 tetrahedra. In the second Ni site, Ni(2) is bonded to one O(13), one O(14), one O(15), one O(16), one O(7), and one O(9) atom to form NiO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  an edgeedge with one Ni(1)O6 octahedra, and  an edgeedge with one P(3)O4 tetrahedra. Zn(1) is bonded in a 4-coordinate geometry to one O(13), one O(5), one O(6), and one O(7) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(12), one O(2), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Ni(1)O6 octahedra and  a cornercorner with one Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-53°. In the second P site, P(2) is bonded to one O(1), one O(13), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Ni(1)O6 octahedra and  a cornercorner with one Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-56°. In the third P site, P(3) is bonded to one O(10), one O(14), one O(15), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Ni(1)O6 octahedra,  a cornercorner with one Ni(2)O6 octahedra, and  an edgeedge with one Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-55°. In the fourth P site, P(4) is bonded to one O(16), one O(4), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Ni(1)O6 octahedra,  a cornercorner with one Ni(2)O6 octahedra, and  an edgeedge with one Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-55°. There are sixteen 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(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sr(2) and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(2), one Ni(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Sr(2), one Ni(1), and one P(4) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(1), one Zn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Ni(1), one Zn(1), and one P(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Ni(2), one Zn(1), and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Sr(1), one Ni(2), and one P(1) 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(3) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one P(1) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one P(1) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Ni(2), one Zn(1), and one P(2) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Sr(1), one Ni(1), one Ni(2), and one P(3) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Sr(1), one Ni(2), and one P(3) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Sr(2), one Ni(1), one Ni(2), and one P(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2ZnNi2(PO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.551
_cell_length_b   6.885
_cell_length_c   9.240
_cell_angle_alpha   110.266
_cell_angle_beta   101.497
_cell_angle_gamma   98.408
_symmetry_Int_Tables_number   1
_cell_volume   315.566
_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  0.254  0.795  0.059  1.0
  Sr  Sr1  1  0.742  0.205  0.946  1.0
  Zn  Zn2  1  0.994  0.448  0.634  1.0
  Ni  Ni3  1  0.658  0.845  0.554  1.0
  Ni  Ni4  1  0.352  0.138  0.444  1.0
  P  P5  1  0.396  0.424  0.238  1.0
  P  P6  1  0.594  0.573  0.762  1.0
  P  P7  1  0.849  0.025  0.303  1.0
  P  P8  1  0.157  0.970  0.702  1.0
  O  O9  1  0.813  0.560  0.888  1.0
  O  O10  1  0.635  0.463  0.183  1.0
  O  O11  1  0.639  0.795  0.755  1.0
  O  O12  1  0.952  0.105  0.692  1.0
  O  O13  1  0.333  0.518  0.794  1.0
  O  O14  1  0.005  0.737  0.597  1.0
  O  O15  1  0.008  0.252  0.424  1.0
  O  O16  1  0.272  0.010  0.877  1.0
  O  O17  1  0.358  0.201  0.248  1.0
  O  O18  1  0.739  0.002  0.132  1.0
  O  O19  1  0.173  0.437  0.114  1.0
  O  O20  1  0.399  0.595  0.400  1.0
  O  O21  1  0.608  0.401  0.598  1.0
  O  O22  1  0.626  0.951  0.368  1.0
  O  O23  1  0.057  0.894  0.305  1.0
  O  O24  1  0.375  0.038  0.630  1.0
[/CIF]
.