data_global
_chemical_name_mineral 'Diaspore'
loop_
_publ_author_name
'Ewing F'
_journal_name_full 'Journal of Chemical Physics'
_journal_volume 3 
_journal_year 1935
_journal_page_first 203
_journal_page_last 207
_publ_section_title
;
 The Crystal Structure of Diaspore
 _cod_database_code 1011027
;
_database_code_amcsd 0017933
_chemical_formula_sum 'Al O2'
_cell_length_a 4.4
_cell_length_b 9.39
_cell_length_c 2.84
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 117.337
_exptl_crystal_density_diffrn      3.339
_symmetry_space_group_name_H-M 'P b n m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2-z'
  '1/2-x,1/2+y,z'
  '1/2+x,1/2-y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Al1  -0.03600   0.14600  -0.25000
O1   0.27000  -0.20000  -0.25000
O2  -0.21000  -0.05200  -0.25000