The material structure described by SiO2 is beta Tridymite structured and crystallizes in the hexagonal P6_3/mmc space group. Si(1) is bonded to four equivalent O(1,2) atoms to form corner-sharing SiO4 tetrahedra. O(1,2) is bonded in a linear geometry to two equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_SiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.233
_cell_length_b   5.233
_cell_length_c   8.540
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   202.512
_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
  Si  Si0  1  0.333  0.667  0.438  1.0
  Si  Si1  1  0.667  0.333  0.938  1.0
  Si  Si2  1  0.667  0.333  0.562  1.0
  Si  Si3  1  0.333  0.667  0.062  1.0
  O  O4  1  0.500  0.000  0.500  1.0
  O  O5  1  0.500  0.500  1.000  1.0
  O  O6  1  0.000  0.500  0.000  1.0
  O  O7  1  1.000  0.500  0.500  1.0
  O  O8  1  0.333  0.667  0.250  1.0
  O  O9  1  0.667  0.333  0.750  1.0
  O  O10  1  0.500  1.000  1.000  1.0
  O  O11  1  0.500  0.500  0.500  1.0
[/CIF]
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The material structure described by SiO2 is beta Tridymite structured and crystallizes in the hexagonal P6_3/mmc space group. Si(1) is bonded to four equivalent O(1,2) atoms to form corner-sharing SiO4 tetrahedra. O(1,2) is bonded in a linear geometry to two equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_SiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.233
_cell_length_b   5.233
_cell_length_c   8.540
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   202.512
_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
  Si  Si0  1  0.333  0.667  0.438  1.0
  Si  Si1  1  0.667  0.333  0.938  1.0
  Si  Si2  1  0.667  0.333  0.562  1.0
  Si  Si3  1  0.333  0.667  0.062  1.0
  O  O4  1  0.500  0.000  0.500  1.0
  O  O5  1  0.500  0.500  1.000  1.0
  O  O6  1  0.000  0.500  0.000  1.0
  O  O7  1  1.000  0.500  0.500  1.0
  O  O8  1  0.333  0.667  0.250  1.0
  O  O9  1  0.667  0.333  0.750  1.0
  O  O10  1  0.500  1.000  1.000  1.0
  O  O11  1  0.500  0.500  0.500  1.0
[/CIF]
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