data_global
_chemical_name_mineral 'Cristobalite high'
loop_
_publ_author_name
'Barth T'
_journal_name_full 'American Journal of Science'
_journal_volume 23 
_journal_year 1932
_journal_page_first 350
_journal_page_last 356
_publ_section_title
;
 The Cristobalite Structures. I. High-Cristobalite
 _cod_database_code 1010921
;
_database_code_amcsd 0017646
_chemical_formula_sum 'Si O2'
_cell_length_a 7.16
_cell_length_b 7.16
_cell_length_c 7.16
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 367.062
_exptl_crystal_density_diffrn      2.175
_symmetry_space_group_name_H-M 'P 21 3'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-z,-x,1/2+y'
  '-z,1/2+x,1/2-y'
  '1/2+z,1/2-x,-y'
  'z,x,y'
  '1/2+y,1/2-z,-x'
  '1/2-y,-z,1/2+x'
  '-y,1/2+z,1/2-x'
  'y,z,x'
  '-x,1/2+y,1/2-z'
  '1/2+x,1/2-y,-z'
  '1/2-x,-y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si1   0.25500   0.25500   0.25500
Si2  -0.00800  -0.00800  -0.00800
O1   0.12500   0.12500   0.12500
O2   0.66000   0.66000   0.06200