The crystal structure described by Ca(SnO2)2 crystallizes in the triclinic P1 space group. There are six inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to one O(1), one O(16), one O(3), and one O(4) atom to form CaO4 tetrahedra that share  a cornercorner with one Sn(11)O6 octahedra, corners with two equivalent Sn(2)O6 octahedra, corners with two equivalent Sn(4)O6 octahedra, corners with three equivalent Ca(5)O6 octahedra, and  a cornercorner with one Sn(8)O5 square pyramid. The corner-sharing octahedral tilt angles range from 41-71°. In the second Ca site, Ca(2) is bonded to one O(10), one O(11), one O(2), and one O(5) atom to form CaO4 tetrahedra that share  a cornercorner with one Sn(2)O6 octahedra,  a cornercorner with one Sn(4)O6 octahedra, corners with two equivalent Sn(5)O6 octahedra, corners with two equivalent Sn(9)O6 octahedra, and corners with three equivalent Ca(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-72°. In the third Ca site, Ca(3) is bonded to one O(10), one O(11), one O(12), one O(5), one O(6), and one O(8) atom to form distorted CaO6 octahedra that share corners with three equivalent Ca(2)O4 tetrahedra,  an edgeedge with one Sn(2)O6 octahedra,  an edgeedge with one Sn(4)O6 octahedra,  an edgeedge with one Sn(5)O6 octahedra, and  an edgeedge with one Sn(9)O6 octahedra. In the fourth Ca site, Ca(4) is bonded to one O(13), one O(18), one O(19), and one O(7) atom to form CaO4 tetrahedra that share  a cornercorner with one Sn(5)O6 octahedra,  a cornercorner with one Sn(9)O6 octahedra, corners with two equivalent Sn(11)O6 octahedra, corners with three equivalent Sn(6)O6 octahedra, and corners with two equivalent Sn(8)O5 square pyramids. The corner-sharing octahedral tilt angles range from 39-60°. In the fifth Ca site, Ca(5) is bonded to one O(1), one O(21), one O(22), one O(24), one O(3), and one O(4) atom to form distorted CaO6 octahedra that share  a cornercorner with one Sn(8)O5 square pyramid, corners with three equivalent Ca(1)O4 tetrahedra,  an edgeedge with one Sn(11)O6 octahedra,  an edgeedge with one Sn(2)O6 octahedra, and  an edgeedge with one Sn(4)O6 octahedra. In the sixth Ca site, Ca(6) is bonded to one O(14), one O(15), one O(20), and one O(23) atom to form CaO4 tetrahedra that share  a cornercorner with one Sn(11)O6 octahedra, corners with two equivalent Sn(5)O6 octahedra, corners with two equivalent Sn(9)O6 octahedra, corners with three equivalent Sn(6)O6 octahedra, and  a cornercorner with one Sn(8)O5 square pyramid. The corner-sharing octahedral tilt angles range from 52-61°. There are twelve inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted T-shaped geometry to one O(2), one O(3), and one O(4) atom. In the second Sn site, Sn(2) is bonded to one O(1), one O(12), one O(2), one O(4), one O(6), and one O(9) atom to form SnO6 octahedra that share  a cornercorner with one Ca(2)O4 tetrahedra, corners with two equivalent Ca(1)O4 tetrahedra,  an edgeedge with one Ca(3)O6 octahedra,  an edgeedge with one Ca(5)O6 octahedra, and edges with two equivalent Sn(4)O6 octahedra. In the third Sn site, Sn(3) is bonded in a 3-coordinate geometry to one O(10), one O(11), and one O(7) atom. In the fourth Sn site, Sn(4) is bonded to one O(1), one O(12), one O(2), one O(3), one O(8), and one O(9) atom to form SnO6 octahedra that share  a cornercorner with one Ca(2)O4 tetrahedra, corners with two equivalent Ca(1)O4 tetrahedra,  an edgeedge with one Ca(3)O6 octahedra,  an edgeedge with one Ca(5)O6 octahedra, and edges with two equivalent Sn(2)O6 octahedra. In the fifth Sn site, Sn(5) is bonded to one O(11), one O(14), one O(17), one O(20), one O(5), and one O(7) atom to form SnO6 octahedra that share  a cornercorner with one Ca(4)O4 tetrahedra, corners with two equivalent Ca(2)O4 tetrahedra, corners with two equivalent Ca(6)O4 tetrahedra,  an edgeedge with one Ca(3)O6 octahedra,  an edgeedge with one Sn(6)O6 octahedra, and edges with two equivalent Sn(9)O6 octahedra. In the sixth Sn site, Sn(6) is bonded to one O(13), one O(14), one O(15), one O(18), one O(19), and one O(20) atom to form SnO6 octahedra that share corners with three equivalent Ca(4)O4 tetrahedra, corners with three equivalent Ca(6)O4 tetrahedra,  an edgeedge with one Sn(11)O6 octahedra,  an edgeedge with one Sn(5)O6 octahedra,  an edgeedge with one Sn(9)O6 octahedra, and  an edgeedge with one Sn(8)O5 square pyramid. In the seventh Sn site, Sn(7) is bonded in a distorted trigonal non-coplanar geometry to one O(17), one O(6), and one O(8) atom. In the eighth Sn site, Sn(8) is bonded to one O(16), one O(18), one O(19), one O(22), and one O(23) atom to form distorted SnO5 square pyramids that share  a cornercorner with one Ca(5)O6 octahedra,  a cornercorner with one Ca(1)O4 tetrahedra,  a cornercorner with one Ca(6)O4 tetrahedra, corners with two equivalent Ca(4)O4 tetrahedra,  an edgeedge with one Sn(6)O6 octahedra, and edges with two equivalent Sn(11)O6 octahedra. The corner-sharing octahedral tilt angles are 86°. In the ninth Sn site, Sn(9) is bonded to one O(10), one O(15), one O(17), one O(20), one O(5), and one O(7) atom to form SnO6 octahedra that share  a cornercorner with one Ca(4)O4 tetrahedra, corners with two equivalent Ca(2)O4 tetrahedra, corners with two equivalent Ca(6)O4 tetrahedra,  an edgeedge with one Ca(3)O6 octahedra,  an edgeedge with one Sn(6)O6 octahedra, and edges with two equivalent Sn(5)O6 octahedra. In the tenth Sn site, Sn(10) is bonded in a 4-coordinate geometry to one O(16), one O(21), one O(23), and one O(24) atom. In the eleventh Sn site, Sn(11) is bonded to one O(13), one O(16), one O(18), one O(22), one O(23), and one O(24) atom to form SnO6 octahedra that share  a cornercorner with one Ca(1)O4 tetrahedra,  a cornercorner with one Ca(6)O4 tetrahedra, corners with two equivalent Ca(4)O4 tetrahedra,  an edgeedge with one Ca(5)O6 octahedra,  an edgeedge with one Sn(6)O6 octahedra, and edges with two equivalent Sn(8)O5 square pyramids. In the twelfth Sn site, Sn(12) is bonded in a distorted trigonal non-coplanar geometry to one O(21), one O(22), and one O(9) atom. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Ca(5), one Sn(2), and one Sn(4) atom to form distorted OCa2Sn2 trigonal pyramids that share  a cornercorner with one O(4)Ca2Sn2 tetrahedra,  a cornercorner with one O(3)Ca2Sn2 trigonal pyramid,  an edgeedge with one O(4)Ca2Sn2 tetrahedra,  an edgeedge with one O(3)Ca2Sn2 trigonal pyramid, and  an edgeedge with one O(2)CaSn3 trigonal pyramid. In the second O site, O(2) is bonded to one Ca(2), one Sn(1), one Sn(2), and one Sn(4) atom to form a mixture of distorted corner and edge-sharing OCaSn3 trigonal pyramids. In the third O site, O(3) is bonded to one Ca(1), one Ca(5), one Sn(1), and one Sn(4) atom to form distorted OCa2Sn2 trigonal pyramids that share  a cornercorner with one O(4)Ca2Sn2 tetrahedra,  a cornercorner with one O(1)Ca2Sn2 trigonal pyramid,  an edgeedge with one O(4)Ca2Sn2 tetrahedra,  an edgeedge with one O(1)Ca2Sn2 trigonal pyramid, and  an edgeedge with one O(2)CaSn3 trigonal pyramid. In the fourth O site, O(4) is bonded to one Ca(1), one Ca(5), one Sn(1), and one Sn(2) atom to form distorted OCa2Sn2 tetrahedra that share  a cornercorner with one O(1)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(3)Ca2Sn2 trigonal pyramid,  an edgeedge with one O(1)Ca2Sn2 trigonal pyramid,  an edgeedge with one O(3)Ca2Sn2 trigonal pyramid, and  an edgeedge with one O(2)CaSn3 trigonal pyramid. In the fifth O site, O(5) is bonded to one Ca(2), one Ca(3), one Sn(5), and one Sn(9) atom to form distorted OCa2Sn2 trigonal pyramids that share  a cornercorner with one O(10)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(11)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(2)CaSn3 trigonal pyramid,  an edgeedge with one O(7)CaSn3 tetrahedra,  an edgeedge with one O(10)Ca2Sn2 trigonal pyramid, and  an edgeedge with one O(11)Ca2Sn2 trigonal pyramid. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Ca(3), one Sn(2), and one Sn(7) atom. In the seventh O site, O(7) is bonded to one Ca(4), one Sn(3), one Sn(5), and one Sn(9) atom to form distorted edge-sharing OCaSn3 tetrahedra. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Ca(3), one Sn(4), and one Sn(7) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Sn(12), one Sn(2), and one Sn(4) atom. In the tenth O site, O(10) is bonded to one Ca(2), one Ca(3), one Sn(3), and one Sn(9) atom to form distorted OCa2Sn2 trigonal pyramids that share  a cornercorner with one O(11)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(5)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(2)CaSn3 trigonal pyramid,  an edgeedge with one O(7)CaSn3 tetrahedra,  an edgeedge with one O(11)Ca2Sn2 trigonal pyramid, and  an edgeedge with one O(5)Ca2Sn2 trigonal pyramid. In the eleventh O site, O(11) is bonded to one Ca(2), one Ca(3), one Sn(3), and one Sn(5) atom to form distorted OCa2Sn2 trigonal pyramids that share  a cornercorner with one O(10)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(5)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(2)CaSn3 trigonal pyramid,  an edgeedge with one O(7)CaSn3 tetrahedra,  an edgeedge with one O(10)Ca2Sn2 trigonal pyramid, and  an edgeedge with one O(5)Ca2Sn2 trigonal pyramid. In the twelfth O site, O(12) is bonded in a distorted trigonal non-coplanar geometry to one Ca(3), one Sn(2), and one Sn(4) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Ca(4), one Sn(11), and one Sn(6) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Ca(6), one Sn(5), and one Sn(6) atom. In the fifteenth O site, O(15) is bonded in a trigonal planar geometry to one Ca(6), one Sn(6), and one Sn(9) atom. In the sixteenth O site, O(16) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Sn(10), one Sn(11), and one Sn(8) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one Sn(5), one Sn(7), and one Sn(9) atom. In the eighteenth O site, O(18) is bonded in a distorted rectangular see-saw-like geometry to one Ca(4), one Sn(11), one Sn(6), and one Sn(8) atom. In the nineteenth O site, O(19) is bonded in a trigonal planar geometry to one Ca(4), one Sn(6), and one Sn(8) atom. In the twentieth O site, O(20) is bonded in a rectangular see-saw-like geometry to one Ca(6), one Sn(5), one Sn(6), and one Sn(9) atom. In the twenty-first O site, O(21) is bonded in a distorted trigonal planar geometry to one Ca(5), one Sn(10), and one Sn(12) atom. In the twenty-second O site, O(22) is bonded in a rectangular see-saw-like geometry to one Ca(5), one Sn(11), one Sn(12), and one Sn(8) atom. In the twenty-third O site, O(23) is bonded in a distorted trigonal pyramidal geometry to one Ca(6), one Sn(10), one Sn(11), and one Sn(8) atom. In the twenty-fourth O site, O(24) is bonded in a trigonal non-coplanar geometry to one Ca(5), one Sn(10), and one Sn(11) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca(SnO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.593
_cell_length_b   7.017
_cell_length_c   16.779
_cell_angle_alpha   94.147
_cell_angle_beta   89.718
_cell_angle_gamma   117.354
_symmetry_Int_Tables_number   1
_cell_volume   687.316
_cell_formula_units_Z   6
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  0.145  0.302  0.963  1.0
  Ca  Ca1  1  0.480  0.971  0.629  1.0
  Ca  Ca2  1  0.829  0.660  0.666  1.0
  Ca  Ca3  1  0.841  0.668  0.292  1.0
  Ca  Ca4  1  0.476  0.982  0.003  1.0
  Ca  Ca5  1  0.499  0.026  0.372  1.0
  Sn  Sn6  1  0.639  0.289  0.841  1.0
  Sn  Sn7  1  0.160  0.826  0.832  1.0
  Sn  Sn8  1  0.982  0.977  0.507  1.0
  Sn  Sn9  1  0.662  0.827  0.834  1.0
  Sn  Sn10  1  0.504  0.512  0.498  1.0
  Sn  Sn11  1  0.175  0.341  0.333  1.0
  Sn  Sn12  1  0.188  0.367  0.704  1.0
  Sn  Sn13  1  0.320  0.653  0.173  1.0
  Sn  Sn14  1  0.004  0.509  0.495  1.0
  Sn  Sn15  1  0.816  0.123  0.161  1.0
  Sn  Sn16  1  0.318  0.147  0.176  1.0
  Sn  Sn17  1  0.841  0.660  0.035  1.0
  O  O18  1  0.345  0.699  0.897  1.0
  O  O19  1  0.484  0.976  0.767  1.0
  O  O20  1  0.782  0.121  0.906  1.0
  O  O21  1  0.325  0.120  0.905  1.0
  O  O22  1  0.689  0.375  0.559  1.0
  O  O23  1  0.052  0.571  0.743  1.0
  O  O24  1  0.827  0.659  0.433  1.0
  O  O25  1  0.520  0.575  0.744  1.0
  O  O26  1  0.871  0.739  0.905  1.0
  O  O27  1  0.129  0.802  0.567  1.0
  O  O28  1  0.666  0.800  0.571  1.0
  O  O29  1  0.962  0.931  0.767  1.0
  O  O30  1  0.068  0.040  0.274  1.0
  O  O31  1  0.358  0.253  0.416  1.0
  O  O32  1  0.887  0.255  0.407  1.0
  O  O33  1  0.168  0.273  0.097  1.0
  O  O34  1  0.213  0.434  0.568  1.0
  O  O35  1  0.457  0.439  0.258  1.0
  O  O36  1  0.070  0.521  0.267  1.0
  O  O37  1  0.320  0.632  0.424  1.0
  O  O38  1  0.698  0.862  0.063  1.0
  O  O39  1  0.163  0.852  0.100  1.0
  O  O40  1  0.456  0.986  0.242  1.0
  O  O41  1  0.608  0.247  0.108  1.0
[/CIF]
.
The crystal structure described by Ca(SnO2)2 crystallizes in the triclinic P1 space group. There are six inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to one O(1), one O(16), one O(3), and one O(4) atom to form CaO4 tetrahedra that share  a cornercorner with one Sn(11)O6 octahedra, corners with two equivalent Sn(2)O6 octahedra, corners with two equivalent Sn(4)O6 octahedra, corners with three equivalent Ca(5)O6 octahedra, and  a cornercorner with one Sn(8)O5 square pyramid. The corner-sharing octahedral tilt angles range from 41-71°. In the second Ca site, Ca(2) is bonded to one O(10), one O(11), one O(2), and one O(5) atom to form CaO4 tetrahedra that share  a cornercorner with one Sn(2)O6 octahedra,  a cornercorner with one Sn(4)O6 octahedra, corners with two equivalent Sn(5)O6 octahedra, corners with two equivalent Sn(9)O6 octahedra, and corners with three equivalent Ca(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-72°. In the third Ca site, Ca(3) is bonded to one O(10), one O(11), one O(12), one O(5), one O(6), and one O(8) atom to form distorted CaO6 octahedra that share corners with three equivalent Ca(2)O4 tetrahedra,  an edgeedge with one Sn(2)O6 octahedra,  an edgeedge with one Sn(4)O6 octahedra,  an edgeedge with one Sn(5)O6 octahedra, and  an edgeedge with one Sn(9)O6 octahedra. In the fourth Ca site, Ca(4) is bonded to one O(13), one O(18), one O(19), and one O(7) atom to form CaO4 tetrahedra that share  a cornercorner with one Sn(5)O6 octahedra,  a cornercorner with one Sn(9)O6 octahedra, corners with two equivalent Sn(11)O6 octahedra, corners with three equivalent Sn(6)O6 octahedra, and corners with two equivalent Sn(8)O5 square pyramids. The corner-sharing octahedral tilt angles range from 39-60°. In the fifth Ca site, Ca(5) is bonded to one O(1), one O(21), one O(22), one O(24), one O(3), and one O(4) atom to form distorted CaO6 octahedra that share  a cornercorner with one Sn(8)O5 square pyramid, corners with three equivalent Ca(1)O4 tetrahedra,  an edgeedge with one Sn(11)O6 octahedra,  an edgeedge with one Sn(2)O6 octahedra, and  an edgeedge with one Sn(4)O6 octahedra. In the sixth Ca site, Ca(6) is bonded to one O(14), one O(15), one O(20), and one O(23) atom to form CaO4 tetrahedra that share  a cornercorner with one Sn(11)O6 octahedra, corners with two equivalent Sn(5)O6 octahedra, corners with two equivalent Sn(9)O6 octahedra, corners with three equivalent Sn(6)O6 octahedra, and  a cornercorner with one Sn(8)O5 square pyramid. The corner-sharing octahedral tilt angles range from 52-61°. There are twelve inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted T-shaped geometry to one O(2), one O(3), and one O(4) atom. In the second Sn site, Sn(2) is bonded to one O(1), one O(12), one O(2), one O(4), one O(6), and one O(9) atom to form SnO6 octahedra that share  a cornercorner with one Ca(2)O4 tetrahedra, corners with two equivalent Ca(1)O4 tetrahedra,  an edgeedge with one Ca(3)O6 octahedra,  an edgeedge with one Ca(5)O6 octahedra, and edges with two equivalent Sn(4)O6 octahedra. In the third Sn site, Sn(3) is bonded in a 3-coordinate geometry to one O(10), one O(11), and one O(7) atom. In the fourth Sn site, Sn(4) is bonded to one O(1), one O(12), one O(2), one O(3), one O(8), and one O(9) atom to form SnO6 octahedra that share  a cornercorner with one Ca(2)O4 tetrahedra, corners with two equivalent Ca(1)O4 tetrahedra,  an edgeedge with one Ca(3)O6 octahedra,  an edgeedge with one Ca(5)O6 octahedra, and edges with two equivalent Sn(2)O6 octahedra. In the fifth Sn site, Sn(5) is bonded to one O(11), one O(14), one O(17), one O(20), one O(5), and one O(7) atom to form SnO6 octahedra that share  a cornercorner with one Ca(4)O4 tetrahedra, corners with two equivalent Ca(2)O4 tetrahedra, corners with two equivalent Ca(6)O4 tetrahedra,  an edgeedge with one Ca(3)O6 octahedra,  an edgeedge with one Sn(6)O6 octahedra, and edges with two equivalent Sn(9)O6 octahedra. In the sixth Sn site, Sn(6) is bonded to one O(13), one O(14), one O(15), one O(18), one O(19), and one O(20) atom to form SnO6 octahedra that share corners with three equivalent Ca(4)O4 tetrahedra, corners with three equivalent Ca(6)O4 tetrahedra,  an edgeedge with one Sn(11)O6 octahedra,  an edgeedge with one Sn(5)O6 octahedra,  an edgeedge with one Sn(9)O6 octahedra, and  an edgeedge with one Sn(8)O5 square pyramid. In the seventh Sn site, Sn(7) is bonded in a distorted trigonal non-coplanar geometry to one O(17), one O(6), and one O(8) atom. In the eighth Sn site, Sn(8) is bonded to one O(16), one O(18), one O(19), one O(22), and one O(23) atom to form distorted SnO5 square pyramids that share  a cornercorner with one Ca(5)O6 octahedra,  a cornercorner with one Ca(1)O4 tetrahedra,  a cornercorner with one Ca(6)O4 tetrahedra, corners with two equivalent Ca(4)O4 tetrahedra,  an edgeedge with one Sn(6)O6 octahedra, and edges with two equivalent Sn(11)O6 octahedra. The corner-sharing octahedral tilt angles are 86°. In the ninth Sn site, Sn(9) is bonded to one O(10), one O(15), one O(17), one O(20), one O(5), and one O(7) atom to form SnO6 octahedra that share  a cornercorner with one Ca(4)O4 tetrahedra, corners with two equivalent Ca(2)O4 tetrahedra, corners with two equivalent Ca(6)O4 tetrahedra,  an edgeedge with one Ca(3)O6 octahedra,  an edgeedge with one Sn(6)O6 octahedra, and edges with two equivalent Sn(5)O6 octahedra. In the tenth Sn site, Sn(10) is bonded in a 4-coordinate geometry to one O(16), one O(21), one O(23), and one O(24) atom. In the eleventh Sn site, Sn(11) is bonded to one O(13), one O(16), one O(18), one O(22), one O(23), and one O(24) atom to form SnO6 octahedra that share  a cornercorner with one Ca(1)O4 tetrahedra,  a cornercorner with one Ca(6)O4 tetrahedra, corners with two equivalent Ca(4)O4 tetrahedra,  an edgeedge with one Ca(5)O6 octahedra,  an edgeedge with one Sn(6)O6 octahedra, and edges with two equivalent Sn(8)O5 square pyramids. In the twelfth Sn site, Sn(12) is bonded in a distorted trigonal non-coplanar geometry to one O(21), one O(22), and one O(9) atom. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Ca(5), one Sn(2), and one Sn(4) atom to form distorted OCa2Sn2 trigonal pyramids that share  a cornercorner with one O(4)Ca2Sn2 tetrahedra,  a cornercorner with one O(3)Ca2Sn2 trigonal pyramid,  an edgeedge with one O(4)Ca2Sn2 tetrahedra,  an edgeedge with one O(3)Ca2Sn2 trigonal pyramid, and  an edgeedge with one O(2)CaSn3 trigonal pyramid. In the second O site, O(2) is bonded to one Ca(2), one Sn(1), one Sn(2), and one Sn(4) atom to form a mixture of distorted corner and edge-sharing OCaSn3 trigonal pyramids. In the third O site, O(3) is bonded to one Ca(1), one Ca(5), one Sn(1), and one Sn(4) atom to form distorted OCa2Sn2 trigonal pyramids that share  a cornercorner with one O(4)Ca2Sn2 tetrahedra,  a cornercorner with one O(1)Ca2Sn2 trigonal pyramid,  an edgeedge with one O(4)Ca2Sn2 tetrahedra,  an edgeedge with one O(1)Ca2Sn2 trigonal pyramid, and  an edgeedge with one O(2)CaSn3 trigonal pyramid. In the fourth O site, O(4) is bonded to one Ca(1), one Ca(5), one Sn(1), and one Sn(2) atom to form distorted OCa2Sn2 tetrahedra that share  a cornercorner with one O(1)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(3)Ca2Sn2 trigonal pyramid,  an edgeedge with one O(1)Ca2Sn2 trigonal pyramid,  an edgeedge with one O(3)Ca2Sn2 trigonal pyramid, and  an edgeedge with one O(2)CaSn3 trigonal pyramid. In the fifth O site, O(5) is bonded to one Ca(2), one Ca(3), one Sn(5), and one Sn(9) atom to form distorted OCa2Sn2 trigonal pyramids that share  a cornercorner with one O(10)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(11)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(2)CaSn3 trigonal pyramid,  an edgeedge with one O(7)CaSn3 tetrahedra,  an edgeedge with one O(10)Ca2Sn2 trigonal pyramid, and  an edgeedge with one O(11)Ca2Sn2 trigonal pyramid. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Ca(3), one Sn(2), and one Sn(7) atom. In the seventh O site, O(7) is bonded to one Ca(4), one Sn(3), one Sn(5), and one Sn(9) atom to form distorted edge-sharing OCaSn3 tetrahedra. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Ca(3), one Sn(4), and one Sn(7) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Sn(12), one Sn(2), and one Sn(4) atom. In the tenth O site, O(10) is bonded to one Ca(2), one Ca(3), one Sn(3), and one Sn(9) atom to form distorted OCa2Sn2 trigonal pyramids that share  a cornercorner with one O(11)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(5)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(2)CaSn3 trigonal pyramid,  an edgeedge with one O(7)CaSn3 tetrahedra,  an edgeedge with one O(11)Ca2Sn2 trigonal pyramid, and  an edgeedge with one O(5)Ca2Sn2 trigonal pyramid. In the eleventh O site, O(11) is bonded to one Ca(2), one Ca(3), one Sn(3), and one Sn(5) atom to form distorted OCa2Sn2 trigonal pyramids that share  a cornercorner with one O(10)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(5)Ca2Sn2 trigonal pyramid,  a cornercorner with one O(2)CaSn3 trigonal pyramid,  an edgeedge with one O(7)CaSn3 tetrahedra,  an edgeedge with one O(10)Ca2Sn2 trigonal pyramid, and  an edgeedge with one O(5)Ca2Sn2 trigonal pyramid. In the twelfth O site, O(12) is bonded in a distorted trigonal non-coplanar geometry to one Ca(3), one Sn(2), and one Sn(4) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Ca(4), one Sn(11), and one Sn(6) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Ca(6), one Sn(5), and one Sn(6) atom. In the fifteenth O site, O(15) is bonded in a trigonal planar geometry to one Ca(6), one Sn(6), and one Sn(9) atom. In the sixteenth O site, O(16) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Sn(10), one Sn(11), and one Sn(8) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one Sn(5), one Sn(7), and one Sn(9) atom. In the eighteenth O site, O(18) is bonded in a distorted rectangular see-saw-like geometry to one Ca(4), one Sn(11), one Sn(6), and one Sn(8) atom. In the nineteenth O site, O(19) is bonded in a trigonal planar geometry to one Ca(4), one Sn(6), and one Sn(8) atom. In the twentieth O site, O(20) is bonded in a rectangular see-saw-like geometry to one Ca(6), one Sn(5), one Sn(6), and one Sn(9) atom. In the twenty-first O site, O(21) is bonded in a distorted trigonal planar geometry to one Ca(5), one Sn(10), and one Sn(12) atom. In the twenty-second O site, O(22) is bonded in a rectangular see-saw-like geometry to one Ca(5), one Sn(11), one Sn(12), and one Sn(8) atom. In the twenty-third O site, O(23) is bonded in a distorted trigonal pyramidal geometry to one Ca(6), one Sn(10), one Sn(11), and one Sn(8) atom. In the twenty-fourth O site, O(24) is bonded in a trigonal non-coplanar geometry to one Ca(5), one Sn(10), and one Sn(11) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca(SnO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.593
_cell_length_b   7.017
_cell_length_c   16.779
_cell_angle_alpha   94.147
_cell_angle_beta   89.718
_cell_angle_gamma   117.354
_symmetry_Int_Tables_number   1
_cell_volume   687.316
_cell_formula_units_Z   6
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  0.145  0.302  0.963  1.0
  Ca  Ca1  1  0.480  0.971  0.629  1.0
  Ca  Ca2  1  0.829  0.660  0.666  1.0
  Ca  Ca3  1  0.841  0.668  0.292  1.0
  Ca  Ca4  1  0.476  0.982  0.003  1.0
  Ca  Ca5  1  0.499  0.026  0.372  1.0
  Sn  Sn6  1  0.639  0.289  0.841  1.0
  Sn  Sn7  1  0.160  0.826  0.832  1.0
  Sn  Sn8  1  0.982  0.977  0.507  1.0
  Sn  Sn9  1  0.662  0.827  0.834  1.0
  Sn  Sn10  1  0.504  0.512  0.498  1.0
  Sn  Sn11  1  0.175  0.341  0.333  1.0
  Sn  Sn12  1  0.188  0.367  0.704  1.0
  Sn  Sn13  1  0.320  0.653  0.173  1.0
  Sn  Sn14  1  0.004  0.509  0.495  1.0
  Sn  Sn15  1  0.816  0.123  0.161  1.0
  Sn  Sn16  1  0.318  0.147  0.176  1.0
  Sn  Sn17  1  0.841  0.660  0.035  1.0
  O  O18  1  0.345  0.699  0.897  1.0
  O  O19  1  0.484  0.976  0.767  1.0
  O  O20  1  0.782  0.121  0.906  1.0
  O  O21  1  0.325  0.120  0.905  1.0
  O  O22  1  0.689  0.375  0.559  1.0
  O  O23  1  0.052  0.571  0.743  1.0
  O  O24  1  0.827  0.659  0.433  1.0
  O  O25  1  0.520  0.575  0.744  1.0
  O  O26  1  0.871  0.739  0.905  1.0
  O  O27  1  0.129  0.802  0.567  1.0
  O  O28  1  0.666  0.800  0.571  1.0
  O  O29  1  0.962  0.931  0.767  1.0
  O  O30  1  0.068  0.040  0.274  1.0
  O  O31  1  0.358  0.253  0.416  1.0
  O  O32  1  0.887  0.255  0.407  1.0
  O  O33  1  0.168  0.273  0.097  1.0
  O  O34  1  0.213  0.434  0.568  1.0
  O  O35  1  0.457  0.439  0.258  1.0
  O  O36  1  0.070  0.521  0.267  1.0
  O  O37  1  0.320  0.632  0.424  1.0
  O  O38  1  0.698  0.862  0.063  1.0
  O  O39  1  0.163  0.852  0.100  1.0
  O  O40  1  0.456  0.986  0.242  1.0
  O  O41  1  0.608  0.247  0.108  1.0
[/CIF]
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