The crystal structure described by SnO2 crystallizes in the trigonal P3m1 space group. There are six inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(2), one O(5), two equivalent O(1), and two equivalent O(4) atoms to form SnO6 octahedra that share  a cornercorner with one Sn(6)O4 tetrahedra,  an edgeedge with one Sn(3)O6 octahedra, and edges with four equivalent Sn(1)O6 octahedra. In the second Sn site, Sn(2) is bonded to one O(6), one O(9), two equivalent O(3), and two equivalent O(8) atoms to form edge-sharing SnO6 octahedra. In the third Sn site, Sn(3) is bonded to three equivalent O(3) and three equivalent O(4) atoms to form edge-sharing SnO6 octahedra. In the fourth Sn site, Sn(4) is bonded to three equivalent O(7) and three equivalent O(8) atoms to form edge-sharing SnO6 octahedra. In the fifth Sn site, Sn(5) is bonded to one O(10), one O(12), two equivalent O(11), and two equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Sn(6)O4 tetrahedra,  an edgeedge with one Sn(4)O6 octahedra, and edges with four equivalent Sn(5)O6 octahedra. In the sixth Sn site, Sn(6) is bonded to one O(5) and three equivalent O(11) atoms to form corner-sharing SnO4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-57°. There are twelve inequivalent O sites. In the first O site, O(11) is bonded in a trigonal planar geometry to one Sn(6) and two equivalent Sn(5) atoms. In the second O site, O(12) is bonded in a trigonal non-coplanar geometry to three equivalent Sn(5) atoms. In the third O site, O(1) is bonded in an L-shaped geometry to two equivalent Sn(1) atoms. In the fourth O site, O(2) is bonded in a distorted T-shaped geometry to three equivalent Sn(1) atoms. In the fifth O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Sn(3) and two equivalent Sn(2) atoms. In the sixth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Sn(3) and two equivalent Sn(1) atoms. In the seventh O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Sn(6) and three equivalent Sn(1) atoms. In the eighth O site, O(6) is bonded in a distorted T-shaped geometry to three equivalent Sn(2) atoms. In the ninth O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Sn(4) and two equivalent Sn(5) atoms. In the tenth O site, O(8) is bonded in a distorted T-shaped geometry to one Sn(4) and two equivalent Sn(2) atoms. In the eleventh O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Sn(2) atoms. In the twelfth O site, O(10) is bonded in a distorted T-shaped geometry to three equivalent Sn(5) atoms. is represented by the CIF card [CIF]
data_SnO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.449
_cell_length_b   6.449
_cell_length_c   15.531
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   559.430
_cell_formula_units_Z   12
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
  Sn  Sn0  1  0.982  0.491  0.167  1.0
  Sn  Sn1  1  0.168  0.832  0.498  1.0
  Sn  Sn2  1  0.333  0.667  0.330  1.0
  Sn  Sn3  1  0.509  0.018  0.167  1.0
  Sn  Sn4  1  0.665  0.832  0.498  1.0
  Sn  Sn5  1  0.509  0.491  0.167  1.0
  Sn  Sn6  1  0.000  0.000  0.664  1.0
  Sn  Sn7  1  0.168  0.335  0.498  1.0
  Sn  Sn8  1  0.330  0.165  0.835  1.0
  Sn  Sn9  1  0.835  0.670  0.835  1.0
  Sn  Sn10  1  0.835  0.165  0.835  1.0
  Sn  Sn11  1  0.333  0.667  0.957  1.0
  O  O12  1  0.352  0.176  0.100  1.0
  O  O13  1  0.824  0.648  0.100  1.0
  O  O14  1  0.667  0.333  0.244  1.0
  O  O15  1  0.824  0.176  0.100  1.0
  O  O16  1  0.043  0.521  0.422  1.0
  O  O17  1  0.193  0.807  0.242  1.0
  O  O18  1  0.333  0.667  0.085  1.0
  O  O19  1  0.193  0.385  0.242  1.0
  O  O20  1  0.479  0.957  0.422  1.0
  O  O21  1  0.333  0.667  0.569  1.0
  O  O22  1  0.479  0.521  0.422  1.0
  O  O23  1  0.615  0.807  0.242  1.0
  O  O24  1  0.714  0.857  0.754  1.0
  O  O25  1  0.854  0.146  0.578  1.0
  O  O26  1  0.000  0.000  0.433  1.0
  O  O27  1  0.854  0.708  0.578  1.0
  O  O28  1  0.000  0.000  0.903  1.0
  O  O29  1  0.143  0.286  0.754  1.0
  O  O30  1  0.143  0.857  0.754  1.0
  O  O31  1  0.292  0.146  0.578  1.0
  O  O32  1  0.500  0.500  0.902  1.0
  O  O33  1  0.500  0.000  0.902  1.0
  O  O34  1  0.667  0.333  0.774  1.0
  O  O35  1  1.000  0.500  0.902  1.0
[/CIF]
.
The crystal structure described by SnO2 crystallizes in the trigonal P3m1 space group. There are six inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(2), one O(5), two equivalent O(1), and two equivalent O(4) atoms to form SnO6 octahedra that share  a cornercorner with one Sn(6)O4 tetrahedra,  an edgeedge with one Sn(3)O6 octahedra, and edges with four equivalent Sn(1)O6 octahedra. In the second Sn site, Sn(2) is bonded to one O(6), one O(9), two equivalent O(3), and two equivalent O(8) atoms to form edge-sharing SnO6 octahedra. In the third Sn site, Sn(3) is bonded to three equivalent O(3) and three equivalent O(4) atoms to form edge-sharing SnO6 octahedra. In the fourth Sn site, Sn(4) is bonded to three equivalent O(7) and three equivalent O(8) atoms to form edge-sharing SnO6 octahedra. In the fifth Sn site, Sn(5) is bonded to one O(10), one O(12), two equivalent O(11), and two equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Sn(6)O4 tetrahedra,  an edgeedge with one Sn(4)O6 octahedra, and edges with four equivalent Sn(5)O6 octahedra. In the sixth Sn site, Sn(6) is bonded to one O(5) and three equivalent O(11) atoms to form corner-sharing SnO4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-57°. There are twelve inequivalent O sites. In the first O site, O(11) is bonded in a trigonal planar geometry to one Sn(6) and two equivalent Sn(5) atoms. In the second O site, O(12) is bonded in a trigonal non-coplanar geometry to three equivalent Sn(5) atoms. In the third O site, O(1) is bonded in an L-shaped geometry to two equivalent Sn(1) atoms. In the fourth O site, O(2) is bonded in a distorted T-shaped geometry to three equivalent Sn(1) atoms. In the fifth O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Sn(3) and two equivalent Sn(2) atoms. In the sixth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Sn(3) and two equivalent Sn(1) atoms. In the seventh O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Sn(6) and three equivalent Sn(1) atoms. In the eighth O site, O(6) is bonded in a distorted T-shaped geometry to three equivalent Sn(2) atoms. In the ninth O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Sn(4) and two equivalent Sn(5) atoms. In the tenth O site, O(8) is bonded in a distorted T-shaped geometry to one Sn(4) and two equivalent Sn(2) atoms. In the eleventh O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Sn(2) atoms. In the twelfth O site, O(10) is bonded in a distorted T-shaped geometry to three equivalent Sn(5) atoms. is represented by the CIF card [CIF]
data_SnO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.449
_cell_length_b   6.449
_cell_length_c   15.531
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   559.430
_cell_formula_units_Z   12
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
  Sn  Sn0  1  0.982  0.491  0.167  1.0
  Sn  Sn1  1  0.168  0.832  0.498  1.0
  Sn  Sn2  1  0.333  0.667  0.330  1.0
  Sn  Sn3  1  0.509  0.018  0.167  1.0
  Sn  Sn4  1  0.665  0.832  0.498  1.0
  Sn  Sn5  1  0.509  0.491  0.167  1.0
  Sn  Sn6  1  0.000  0.000  0.664  1.0
  Sn  Sn7  1  0.168  0.335  0.498  1.0
  Sn  Sn8  1  0.330  0.165  0.835  1.0
  Sn  Sn9  1  0.835  0.670  0.835  1.0
  Sn  Sn10  1  0.835  0.165  0.835  1.0
  Sn  Sn11  1  0.333  0.667  0.957  1.0
  O  O12  1  0.352  0.176  0.100  1.0
  O  O13  1  0.824  0.648  0.100  1.0
  O  O14  1  0.667  0.333  0.244  1.0
  O  O15  1  0.824  0.176  0.100  1.0
  O  O16  1  0.043  0.521  0.422  1.0
  O  O17  1  0.193  0.807  0.242  1.0
  O  O18  1  0.333  0.667  0.085  1.0
  O  O19  1  0.193  0.385  0.242  1.0
  O  O20  1  0.479  0.957  0.422  1.0
  O  O21  1  0.333  0.667  0.569  1.0
  O  O22  1  0.479  0.521  0.422  1.0
  O  O23  1  0.615  0.807  0.242  1.0
  O  O24  1  0.714  0.857  0.754  1.0
  O  O25  1  0.854  0.146  0.578  1.0
  O  O26  1  0.000  0.000  0.433  1.0
  O  O27  1  0.854  0.708  0.578  1.0
  O  O28  1  0.000  0.000  0.903  1.0
  O  O29  1  0.143  0.286  0.754  1.0
  O  O30  1  0.143  0.857  0.754  1.0
  O  O31  1  0.292  0.146  0.578  1.0
  O  O32  1  0.500  0.500  0.902  1.0
  O  O33  1  0.500  0.000  0.902  1.0
  O  O34  1  0.667  0.333  0.774  1.0
  O  O35  1  1.000  0.500  0.902  1.0
[/CIF]
.