The crystal structure described by ZnSn2O4 crystallizes in the monoclinic Pc space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(4), and two equivalent O(5) atoms. In the second Zn site, Zn(2) is bonded in a distorted see-saw-like geometry to one O(1), one O(6), and two equivalent O(7) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(4), one O(5), two equivalent O(3), and two equivalent O(6) atoms to form edge-sharing SnO6 octahedra. In the second Sn site, Sn(2) is bonded to one O(1), one O(7), two equivalent O(2), and two equivalent O(8) atoms to form edge-sharing SnO6 octahedra. In the third Sn site, Sn(3) is bonded in a 4-coordinate geometry to one O(3), one O(5), and two equivalent O(1) atoms. In the fourth Sn site, Sn(4) is bonded in a distorted see-saw-like geometry to one O(7), one O(8), and two equivalent O(4) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Zn(2), one Sn(2), and two equivalent Sn(3) atoms to form distorted OZnSn3 trigonal pyramids that share corners with two equivalent O(5)Zn2Sn2 tetrahedra, corners with three equivalent O(7)Zn2Sn2 tetrahedra, and corners with two equivalent O(1)ZnSn3 trigonal pyramids. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Zn(1) and two equivalent Sn(2) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sn(3) and two equivalent Sn(1) atoms. In the fourth O site, O(4) is bonded to one Zn(1), one Sn(1), and two equivalent Sn(4) atoms to form distorted OZnSn3 trigonal pyramids that share corners with two equivalent O(7)Zn2Sn2 tetrahedra, corners with three equivalent O(5)Zn2Sn2 tetrahedra, and corners with two equivalent O(4)ZnSn3 trigonal pyramids. In the fifth O site, O(5) is bonded to two equivalent Zn(1), one Sn(1), and one Sn(3) atom to form OZn2Sn2 tetrahedra that share corners with two equivalent O(5)Zn2Sn2 tetrahedra, corners with two equivalent O(1)ZnSn3 trigonal pyramids, and corners with three equivalent O(4)ZnSn3 trigonal pyramids. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Zn(2) and two equivalent Sn(1) atoms. In the seventh O site, O(7) is bonded to two equivalent Zn(2), one Sn(2), and one Sn(4) atom to form OZn2Sn2 tetrahedra that share corners with two equivalent O(7)Zn2Sn2 tetrahedra, corners with two equivalent O(4)ZnSn3 trigonal pyramids, and corners with three equivalent O(1)ZnSn3 trigonal pyramids. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Sn(4) and two equivalent Sn(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zn(SnO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.951
_cell_length_b   3.207
_cell_length_c   10.915
_cell_angle_alpha   88.624
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   383.183
_cell_formula_units_Z   4
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
  Zn  Zn0  1  0.392  0.522  0.745  1.0
  Zn  Zn1  1  0.608  0.522  0.245  1.0
  Zn  Zn2  1  0.892  0.465  0.748  1.0
  Zn  Zn3  1  0.108  0.465  0.248  1.0
  Sn  Sn4  1  0.622  0.126  0.574  1.0
  Sn  Sn5  1  0.378  0.126  0.074  1.0
  Sn  Sn6  1  0.878  0.874  0.073  1.0
  Sn  Sn7  1  0.361  0.220  0.400  1.0
  Sn  Sn8  1  0.859  0.773  0.403  1.0
  Sn  Sn9  1  0.639  0.220  0.900  1.0
  Sn  Sn10  1  0.141  0.773  0.903  1.0
  Sn  Sn11  1  0.122  0.874  0.573  1.0
  O  O12  1  0.799  0.807  0.892  1.0
  O  O13  1  0.759  0.405  0.136  1.0
  O  O14  1  0.486  0.644  0.016  1.0
  O  O15  1  0.298  0.222  0.894  1.0
  O  O16  1  0.241  0.405  0.636  1.0
  O  O17  1  0.489  0.042  0.236  1.0
  O  O18  1  0.261  0.588  0.138  1.0
  O  O19  1  0.988  0.941  0.234  1.0
  O  O20  1  0.514  0.644  0.516  1.0
  O  O21  1  0.984  0.368  0.013  1.0
  O  O22  1  0.739  0.588  0.638  1.0
  O  O23  1  0.012  0.941  0.734  1.0
  O  O24  1  0.511  0.042  0.736  1.0
  O  O25  1  0.016  0.368  0.513  1.0
  O  O26  1  0.201  0.807  0.392  1.0
  O  O27  1  0.702  0.222  0.394  1.0
[/CIF]
.
The crystal structure described by ZnSn2O4 crystallizes in the monoclinic Pc space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(4), and two equivalent O(5) atoms. In the second Zn site, Zn(2) is bonded in a distorted see-saw-like geometry to one O(1), one O(6), and two equivalent O(7) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(4), one O(5), two equivalent O(3), and two equivalent O(6) atoms to form edge-sharing SnO6 octahedra. In the second Sn site, Sn(2) is bonded to one O(1), one O(7), two equivalent O(2), and two equivalent O(8) atoms to form edge-sharing SnO6 octahedra. In the third Sn site, Sn(3) is bonded in a 4-coordinate geometry to one O(3), one O(5), and two equivalent O(1) atoms. In the fourth Sn site, Sn(4) is bonded in a distorted see-saw-like geometry to one O(7), one O(8), and two equivalent O(4) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Zn(2), one Sn(2), and two equivalent Sn(3) atoms to form distorted OZnSn3 trigonal pyramids that share corners with two equivalent O(5)Zn2Sn2 tetrahedra, corners with three equivalent O(7)Zn2Sn2 tetrahedra, and corners with two equivalent O(1)ZnSn3 trigonal pyramids. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Zn(1) and two equivalent Sn(2) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sn(3) and two equivalent Sn(1) atoms. In the fourth O site, O(4) is bonded to one Zn(1), one Sn(1), and two equivalent Sn(4) atoms to form distorted OZnSn3 trigonal pyramids that share corners with two equivalent O(7)Zn2Sn2 tetrahedra, corners with three equivalent O(5)Zn2Sn2 tetrahedra, and corners with two equivalent O(4)ZnSn3 trigonal pyramids. In the fifth O site, O(5) is bonded to two equivalent Zn(1), one Sn(1), and one Sn(3) atom to form OZn2Sn2 tetrahedra that share corners with two equivalent O(5)Zn2Sn2 tetrahedra, corners with two equivalent O(1)ZnSn3 trigonal pyramids, and corners with three equivalent O(4)ZnSn3 trigonal pyramids. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Zn(2) and two equivalent Sn(1) atoms. In the seventh O site, O(7) is bonded to two equivalent Zn(2), one Sn(2), and one Sn(4) atom to form OZn2Sn2 tetrahedra that share corners with two equivalent O(7)Zn2Sn2 tetrahedra, corners with two equivalent O(4)ZnSn3 trigonal pyramids, and corners with three equivalent O(1)ZnSn3 trigonal pyramids. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Sn(4) and two equivalent Sn(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zn(SnO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.951
_cell_length_b   3.207
_cell_length_c   10.915
_cell_angle_alpha   88.624
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   383.183
_cell_formula_units_Z   4
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
  Zn  Zn0  1  0.392  0.522  0.745  1.0
  Zn  Zn1  1  0.608  0.522  0.245  1.0
  Zn  Zn2  1  0.892  0.465  0.748  1.0
  Zn  Zn3  1  0.108  0.465  0.248  1.0
  Sn  Sn4  1  0.622  0.126  0.574  1.0
  Sn  Sn5  1  0.378  0.126  0.074  1.0
  Sn  Sn6  1  0.878  0.874  0.073  1.0
  Sn  Sn7  1  0.361  0.220  0.400  1.0
  Sn  Sn8  1  0.859  0.773  0.403  1.0
  Sn  Sn9  1  0.639  0.220  0.900  1.0
  Sn  Sn10  1  0.141  0.773  0.903  1.0
  Sn  Sn11  1  0.122  0.874  0.573  1.0
  O  O12  1  0.799  0.807  0.892  1.0
  O  O13  1  0.759  0.405  0.136  1.0
  O  O14  1  0.486  0.644  0.016  1.0
  O  O15  1  0.298  0.222  0.894  1.0
  O  O16  1  0.241  0.405  0.636  1.0
  O  O17  1  0.489  0.042  0.236  1.0
  O  O18  1  0.261  0.588  0.138  1.0
  O  O19  1  0.988  0.941  0.234  1.0
  O  O20  1  0.514  0.644  0.516  1.0
  O  O21  1  0.984  0.368  0.013  1.0
  O  O22  1  0.739  0.588  0.638  1.0
  O  O23  1  0.012  0.941  0.734  1.0
  O  O24  1  0.511  0.042  0.736  1.0
  O  O25  1  0.016  0.368  0.513  1.0
  O  O26  1  0.201  0.807  0.392  1.0
  O  O27  1  0.702  0.222  0.394  1.0
[/CIF]
.