The material structure described by Ca(SnO2)2 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 7-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(4), two equivalent O(2), and three equivalent O(3) atoms to form edge-sharing SnO6 octahedra. In the second Sn site, Sn(2) is bonded in a rectangular see-saw-like geometry to one O(2) and three equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1) and three equivalent Sn(2) atoms to form OCa2Sn3 trigonal bipyramids that share corners with two equivalent O(3)Ca2Sn3 square pyramids, corners with five equivalent O(2)CaSn3 tetrahedra,  an edgeedge with one O(3)Ca2Sn3 square pyramid, and edges with four equivalent O(1)Ca2Sn3 trigonal bipyramids. In the second O site, O(2) is bonded to one Ca(1), one Sn(2), and two equivalent Sn(1) atoms to form distorted OCaSn3 tetrahedra that share corners with two equivalent O(3)Ca2Sn3 square pyramids, corners with two equivalent O(2)CaSn3 tetrahedra, corners with five equivalent O(1)Ca2Sn3 trigonal bipyramids, and edges with three equivalent O(3)Ca2Sn3 square pyramids. In the third O site, O(3) is bonded to two equivalent Ca(1) and three equivalent Sn(1) atoms to form distorted OCa2Sn3 square pyramids that share corners with two equivalent O(2)CaSn3 tetrahedra, corners with two equivalent O(1)Ca2Sn3 trigonal bipyramids, edges with four equivalent O(3)Ca2Sn3 square pyramids, edges with three equivalent O(2)CaSn3 tetrahedra, and  an edgeedge with one O(1)Ca2Sn3 trigonal bipyramid. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ca(1) and one Sn(1) atom. is represented by the CIF file [CIF]
data_Ca(SnO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.252
_cell_length_b   10.265
_cell_length_c   12.193
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   407.036
_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
  Ca  Ca0  1  0.750  0.268  0.839  1.0
  Ca  Ca1  1  0.250  0.732  0.161  1.0
  Ca  Ca2  1  0.750  0.768  0.661  1.0
  Ca  Ca3  1  0.250  0.232  0.339  1.0
  Sn  Sn4  1  0.250  0.441  0.611  1.0
  Sn  Sn5  1  0.750  0.059  0.111  1.0
  Sn  Sn6  1  0.250  0.941  0.889  1.0
  Sn  Sn7  1  0.750  0.559  0.389  1.0
  Sn  Sn8  1  0.750  0.585  0.893  1.0
  Sn  Sn9  1  0.250  0.415  0.107  1.0
  Sn  Sn10  1  0.750  0.085  0.607  1.0
  Sn  Sn11  1  0.250  0.915  0.393  1.0
  O  O12  1  0.250  0.927  0.592  1.0
  O  O13  1  0.750  0.073  0.408  1.0
  O  O14  1  0.250  0.427  0.908  1.0
  O  O15  1  0.750  0.573  0.092  1.0
  O  O16  1  0.250  0.969  0.192  1.0
  O  O17  1  0.750  0.031  0.808  1.0
  O  O18  1  0.250  0.469  0.308  1.0
  O  O19  1  0.750  0.531  0.692  1.0
  O  O20  1  0.250  0.613  0.503  1.0
  O  O21  1  0.750  0.387  0.497  1.0
  O  O22  1  0.250  0.113  0.997  1.0
  O  O23  1  0.750  0.887  0.003  1.0
  O  O24  1  0.750  0.719  0.294  1.0
  O  O25  1  0.250  0.281  0.706  1.0
  O  O26  1  0.250  0.781  0.794  1.0
  O  O27  1  0.750  0.219  0.206  1.0
[/CIF]
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The material structure described by Ca(SnO2)2 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 7-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(4), two equivalent O(2), and three equivalent O(3) atoms to form edge-sharing SnO6 octahedra. In the second Sn site, Sn(2) is bonded in a rectangular see-saw-like geometry to one O(2) and three equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1) and three equivalent Sn(2) atoms to form OCa2Sn3 trigonal bipyramids that share corners with two equivalent O(3)Ca2Sn3 square pyramids, corners with five equivalent O(2)CaSn3 tetrahedra,  an edgeedge with one O(3)Ca2Sn3 square pyramid, and edges with four equivalent O(1)Ca2Sn3 trigonal bipyramids. In the second O site, O(2) is bonded to one Ca(1), one Sn(2), and two equivalent Sn(1) atoms to form distorted OCaSn3 tetrahedra that share corners with two equivalent O(3)Ca2Sn3 square pyramids, corners with two equivalent O(2)CaSn3 tetrahedra, corners with five equivalent O(1)Ca2Sn3 trigonal bipyramids, and edges with three equivalent O(3)Ca2Sn3 square pyramids. In the third O site, O(3) is bonded to two equivalent Ca(1) and three equivalent Sn(1) atoms to form distorted OCa2Sn3 square pyramids that share corners with two equivalent O(2)CaSn3 tetrahedra, corners with two equivalent O(1)Ca2Sn3 trigonal bipyramids, edges with four equivalent O(3)Ca2Sn3 square pyramids, edges with three equivalent O(2)CaSn3 tetrahedra, and  an edgeedge with one O(1)Ca2Sn3 trigonal bipyramid. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ca(1) and one Sn(1) atom. is represented by the CIF file [CIF]
data_Ca(SnO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.252
_cell_length_b   10.265
_cell_length_c   12.193
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   407.036
_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
  Ca  Ca0  1  0.750  0.268  0.839  1.0
  Ca  Ca1  1  0.250  0.732  0.161  1.0
  Ca  Ca2  1  0.750  0.768  0.661  1.0
  Ca  Ca3  1  0.250  0.232  0.339  1.0
  Sn  Sn4  1  0.250  0.441  0.611  1.0
  Sn  Sn5  1  0.750  0.059  0.111  1.0
  Sn  Sn6  1  0.250  0.941  0.889  1.0
  Sn  Sn7  1  0.750  0.559  0.389  1.0
  Sn  Sn8  1  0.750  0.585  0.893  1.0
  Sn  Sn9  1  0.250  0.415  0.107  1.0
  Sn  Sn10  1  0.750  0.085  0.607  1.0
  Sn  Sn11  1  0.250  0.915  0.393  1.0
  O  O12  1  0.250  0.927  0.592  1.0
  O  O13  1  0.750  0.073  0.408  1.0
  O  O14  1  0.250  0.427  0.908  1.0
  O  O15  1  0.750  0.573  0.092  1.0
  O  O16  1  0.250  0.969  0.192  1.0
  O  O17  1  0.750  0.031  0.808  1.0
  O  O18  1  0.250  0.469  0.308  1.0
  O  O19  1  0.750  0.531  0.692  1.0
  O  O20  1  0.250  0.613  0.503  1.0
  O  O21  1  0.750  0.387  0.497  1.0
  O  O22  1  0.250  0.113  0.997  1.0
  O  O23  1  0.750  0.887  0.003  1.0
  O  O24  1  0.750  0.719  0.294  1.0
  O  O25  1  0.250  0.281  0.706  1.0
  O  O26  1  0.250  0.781  0.794  1.0
  O  O27  1  0.750  0.219  0.206  1.0
[/CIF]
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