The material described by Sr2Zn3(AsO)2 crystallizes in the tetragonal I4/mmm space group. Sr(1) is bonded in a 4-coordinate geometry to four equivalent As(1) and four equivalent O(1) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to four equivalent As(1) atoms to form a mixture of edge and corner-sharing ZnAs4 tetrahedra. In the second Zn site, Zn(2) is bonded in a square co-planar geometry to four equivalent O(1) atoms. As(1) is bonded in a 8-coordinate geometry to four equivalent Sr(1) and four equivalent Zn(1) atoms. O(1) is bonded to four equivalent Sr(1) and two equivalent Zn(2) atoms to form a mixture of edge, corner, and face-sharing OSr4Zn2 octahedra. The corner-sharing octahedra are not tilted. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2Zn3(AsO)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.132
_cell_length_b   4.132
_cell_length_c   9.996
_cell_angle_alpha   101.927
_cell_angle_beta   101.927
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   163.213
_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  0.415  0.415  0.830  1.0
  Sr  Sr1  1  0.585  0.585  0.170  1.0
  Zn  Zn2  1  0.250  0.750  0.500  1.0
  Zn  Zn3  1  0.750  0.250  0.500  1.0
  Zn  Zn4  1  0.000  0.000  0.000  1.0
  As  As5  1  0.168  0.168  0.337  1.0
  As  As6  1  0.832  0.832  0.663  1.0
  O  O7  1  0.000  0.500  0.000  1.0
  O  O8  1  0.500  0.000  0.000  1.0
[/CIF]
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The material described by Sr2Zn3(AsO)2 crystallizes in the tetragonal I4/mmm space group. Sr(1) is bonded in a 4-coordinate geometry to four equivalent As(1) and four equivalent O(1) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to four equivalent As(1) atoms to form a mixture of edge and corner-sharing ZnAs4 tetrahedra. In the second Zn site, Zn(2) is bonded in a square co-planar geometry to four equivalent O(1) atoms. As(1) is bonded in a 8-coordinate geometry to four equivalent Sr(1) and four equivalent Zn(1) atoms. O(1) is bonded to four equivalent Sr(1) and two equivalent Zn(2) atoms to form a mixture of edge, corner, and face-sharing OSr4Zn2 octahedra. The corner-sharing octahedra are not tilted. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2Zn3(AsO)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.132
_cell_length_b   4.132
_cell_length_c   9.996
_cell_angle_alpha   101.927
_cell_angle_beta   101.927
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   163.213
_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  0.415  0.415  0.830  1.0
  Sr  Sr1  1  0.585  0.585  0.170  1.0
  Zn  Zn2  1  0.250  0.750  0.500  1.0
  Zn  Zn3  1  0.750  0.250  0.500  1.0
  Zn  Zn4  1  0.000  0.000  0.000  1.0
  As  As5  1  0.168  0.168  0.337  1.0
  As  As6  1  0.832  0.832  0.663  1.0
  O  O7  1  0.000  0.500  0.000  1.0
  O  O8  1  0.500  0.000  0.000  1.0
[/CIF]
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