The material structure described by Ca(SnO2)4 crystallizes in the monoclinic Cm space group. Ca(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent 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(2), one O(7), two equivalent O(4), and two equivalent O(5) atoms to form SnO6 octahedra that share corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(2)O4 tetrahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(4)O6 octahedra. The corner-sharing octahedral tilt angles are 50°. In the second Sn site, Sn(2) is bonded to one O(4), one O(8), and two equivalent O(3) atoms to form distorted SnO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(4)O6 octahedra, and corners with two equivalent Sn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-71°. In the third Sn site, Sn(3) is bonded to one O(1), one O(6), two equivalent O(2), and two equivalent O(8) atoms to form SnO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(4)O6 octahedra, corners with two equivalent Sn(2)O4 tetrahedra, and edges with two equivalent Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-56°. In the fourth Sn site, Sn(4) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(2)O4 tetrahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(4)O6 octahedra. The corner-sharing octahedral tilt angles are 56°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Sn(3) and two equivalent Sn(4) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Sn(1) and two equivalent Sn(3) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ca(1), one Sn(4), and two equivalent Sn(2) atoms. In the fourth O site, O(4) is bonded to one Ca(1), one Sn(2), and two equivalent Sn(1) atoms to form distorted OCaSn3 trigonal pyramids that share corners with two equivalent O(4)CaSn3 trigonal pyramids and edges with two equivalent O(7)Ca2Sn3 trigonal bipyramids. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Sn(4) and two equivalent Sn(1) atoms. In the sixth O site, O(6) is bonded in a trigonal planar geometry to two equivalent Ca(1) and one Sn(3) atom. In the seventh O site, O(7) is bonded to two equivalent Ca(1), one Sn(1), and two equivalent Sn(4) atoms to form distorted OCa2Sn3 trigonal bipyramids that share edges with two equivalent O(7)Ca2Sn3 trigonal bipyramids and edges with two equivalent O(4)CaSn3 trigonal pyramids. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Sn(2) and two equivalent Sn(3) atoms. is represented by the CIF card [CIF]
data_Ca(SnO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.835
_cell_length_b   7.835
_cell_length_c   10.020
_cell_angle_alpha   54.014
_cell_angle_beta   54.014
_cell_angle_gamma   24.174
_symmetry_Int_Tables_number   1
_cell_volume   201.326
_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
  Ca  Ca0  1  0.638  0.638  0.826  1.0
  Sn  Sn1  1  0.370  0.370  0.433  1.0
  Sn  Sn2  1  0.890  0.890  0.783  1.0
  Sn  Sn3  1  0.150  0.150  0.156  1.0
  Sn  Sn4  1  0.664  0.664  0.480  1.0
  O  O5  1  0.133  0.133  0.389  1.0
  O  O6  1  0.535  0.535  0.257  1.0
  O  O7  1  0.514  0.514  0.718  1.0
  O  O8  1  0.865  0.865  0.570  1.0
  O  O9  1  0.836  0.836  0.328  1.0
  O  O10  1  0.162  0.162  0.943  1.0
  O  O11  1  0.195  0.195  0.600  1.0
  O  O12  1  0.753  0.753  0.087  1.0
[/CIF]
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The material structure described by Ca(SnO2)4 crystallizes in the monoclinic Cm space group. Ca(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent 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(2), one O(7), two equivalent O(4), and two equivalent O(5) atoms to form SnO6 octahedra that share corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(2)O4 tetrahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(4)O6 octahedra. The corner-sharing octahedral tilt angles are 50°. In the second Sn site, Sn(2) is bonded to one O(4), one O(8), and two equivalent O(3) atoms to form distorted SnO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(4)O6 octahedra, and corners with two equivalent Sn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-71°. In the third Sn site, Sn(3) is bonded to one O(1), one O(6), two equivalent O(2), and two equivalent O(8) atoms to form SnO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(4)O6 octahedra, corners with two equivalent Sn(2)O4 tetrahedra, and edges with two equivalent Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-56°. In the fourth Sn site, Sn(4) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(2)O4 tetrahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(4)O6 octahedra. The corner-sharing octahedral tilt angles are 56°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Sn(3) and two equivalent Sn(4) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Sn(1) and two equivalent Sn(3) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ca(1), one Sn(4), and two equivalent Sn(2) atoms. In the fourth O site, O(4) is bonded to one Ca(1), one Sn(2), and two equivalent Sn(1) atoms to form distorted OCaSn3 trigonal pyramids that share corners with two equivalent O(4)CaSn3 trigonal pyramids and edges with two equivalent O(7)Ca2Sn3 trigonal bipyramids. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Sn(4) and two equivalent Sn(1) atoms. In the sixth O site, O(6) is bonded in a trigonal planar geometry to two equivalent Ca(1) and one Sn(3) atom. In the seventh O site, O(7) is bonded to two equivalent Ca(1), one Sn(1), and two equivalent Sn(4) atoms to form distorted OCa2Sn3 trigonal bipyramids that share edges with two equivalent O(7)Ca2Sn3 trigonal bipyramids and edges with two equivalent O(4)CaSn3 trigonal pyramids. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Sn(2) and two equivalent Sn(3) atoms. is represented by the CIF card [CIF]
data_Ca(SnO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.835
_cell_length_b   7.835
_cell_length_c   10.020
_cell_angle_alpha   54.014
_cell_angle_beta   54.014
_cell_angle_gamma   24.174
_symmetry_Int_Tables_number   1
_cell_volume   201.326
_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
  Ca  Ca0  1  0.638  0.638  0.826  1.0
  Sn  Sn1  1  0.370  0.370  0.433  1.0
  Sn  Sn2  1  0.890  0.890  0.783  1.0
  Sn  Sn3  1  0.150  0.150  0.156  1.0
  Sn  Sn4  1  0.664  0.664  0.480  1.0
  O  O5  1  0.133  0.133  0.389  1.0
  O  O6  1  0.535  0.535  0.257  1.0
  O  O7  1  0.514  0.514  0.718  1.0
  O  O8  1  0.865  0.865  0.570  1.0
  O  O9  1  0.836  0.836  0.328  1.0
  O  O10  1  0.162  0.162  0.943  1.0
  O  O11  1  0.195  0.195  0.600  1.0
  O  O12  1  0.753  0.753  0.087  1.0
[/CIF]
.