data_global
_chemical_name_mineral 'Gibbsite'
loop_
_publ_author_name
'Megaw H'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 87 
_journal_year 1934
_journal_page_first 185
_journal_page_last 204
_publ_section_title
;
 The crystal structure of Hydrargillite Al (O H)3
 _cod_database_code 1011081
;
_database_code_amcsd 0017978
_chemical_formula_sum 'Al O3'
_cell_length_a 8.641
_cell_length_b 5.070
_cell_length_c 9.720
_cell_angle_alpha 90
_cell_angle_beta 85.43
_cell_angle_gamma 90
_cell_volume 424.478
_exptl_crystal_density_diffrn      2.347
_symmetry_space_group_name_H-M 'P 1 21/n 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Al1   0.17700   0.52000  -0.00500
Al2   0.33300   0.02000  -0.00500
O1   0.18200   0.20200  -0.11000
O2   0.68200   0.67200  -0.11000
O3   0.51500   0.13200  -0.11000
O4  -0.01500   0.63200  -0.11000
O5   0.29800   0.70200  -0.10000
O6   0.83800   0.17200  -0.10000