The crystal structure described by Na2ZnV2O7 crystallizes in the tetragonal P-42_1m space group. Na(1) is bonded in a 8-coordinate geometry to one O(2), three equivalent O(1), and four equivalent O(3) atoms. V(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form VO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. Zn(1) is bonded to four equivalent O(3) atoms to form ZnO4 tetrahedra that share corners with four equivalent V(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to three equivalent Na(1) and one V(1) atom. In the second O site, O(2) is bonded in a distorted tetrahedral geometry to two equivalent Na(1) and two equivalent V(1) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Na(1), one V(1), and one Zn(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2V2ZnO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.405
_cell_length_b   8.405
_cell_length_c   5.192
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   366.775
_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
  Na  Na0  1  0.165  0.335  0.492  1.0
  Na  Na1  1  0.335  0.835  0.508  1.0
  Na  Na2  1  0.665  0.165  0.508  1.0
  Na  Na3  1  0.835  0.665  0.492  1.0
  V  V4  1  0.145  0.645  0.923  1.0
  V  V5  1  0.645  0.855  0.077  1.0
  V  V6  1  0.355  0.145  0.077  1.0
  V  V7  1  0.855  0.355  0.923  1.0
  Zn  Zn8  1  0.000  0.000  0.000  1.0
  Zn  Zn9  1  0.500  0.500  0.000  1.0
  O  O10  1  0.648  0.852  0.754  1.0
  O  O11  1  0.000  0.500  0.798  1.0
  O  O12  1  0.829  0.905  0.206  1.0
  O  O13  1  0.405  0.329  0.206  1.0
  O  O14  1  0.148  0.648  0.246  1.0
  O  O15  1  0.171  0.095  0.206  1.0
  O  O16  1  0.852  0.352  0.246  1.0
  O  O17  1  0.500  0.000  0.202  1.0
  O  O18  1  0.595  0.671  0.206  1.0
  O  O19  1  0.671  0.405  0.794  1.0
  O  O20  1  0.905  0.171  0.794  1.0
  O  O21  1  0.352  0.148  0.754  1.0
  O  O22  1  0.329  0.595  0.794  1.0
  O  O23  1  0.095  0.829  0.794  1.0
[/CIF]
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The crystal structure described by Na2ZnV2O7 crystallizes in the tetragonal P-42_1m space group. Na(1) is bonded in a 8-coordinate geometry to one O(2), three equivalent O(1), and four equivalent O(3) atoms. V(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form VO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. Zn(1) is bonded to four equivalent O(3) atoms to form ZnO4 tetrahedra that share corners with four equivalent V(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to three equivalent Na(1) and one V(1) atom. In the second O site, O(2) is bonded in a distorted tetrahedral geometry to two equivalent Na(1) and two equivalent V(1) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Na(1), one V(1), and one Zn(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2V2ZnO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.405
_cell_length_b   8.405
_cell_length_c   5.192
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   366.775
_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
  Na  Na0  1  0.165  0.335  0.492  1.0
  Na  Na1  1  0.335  0.835  0.508  1.0
  Na  Na2  1  0.665  0.165  0.508  1.0
  Na  Na3  1  0.835  0.665  0.492  1.0
  V  V4  1  0.145  0.645  0.923  1.0
  V  V5  1  0.645  0.855  0.077  1.0
  V  V6  1  0.355  0.145  0.077  1.0
  V  V7  1  0.855  0.355  0.923  1.0
  Zn  Zn8  1  0.000  0.000  0.000  1.0
  Zn  Zn9  1  0.500  0.500  0.000  1.0
  O  O10  1  0.648  0.852  0.754  1.0
  O  O11  1  0.000  0.500  0.798  1.0
  O  O12  1  0.829  0.905  0.206  1.0
  O  O13  1  0.405  0.329  0.206  1.0
  O  O14  1  0.148  0.648  0.246  1.0
  O  O15  1  0.171  0.095  0.206  1.0
  O  O16  1  0.852  0.352  0.246  1.0
  O  O17  1  0.500  0.000  0.202  1.0
  O  O18  1  0.595  0.671  0.206  1.0
  O  O19  1  0.671  0.405  0.794  1.0
  O  O20  1  0.905  0.171  0.794  1.0
  O  O21  1  0.352  0.148  0.754  1.0
  O  O22  1  0.329  0.595  0.794  1.0
  O  O23  1  0.095  0.829  0.794  1.0
[/CIF]
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