data_global
_chemical_name_mineral 'Bridgmanite'
loop_
_publ_author_name
'Ross N L'
'Hazen R M'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 17 
_journal_year 1990
_journal_page_first 228
_journal_page_last 237
_publ_section_title
;
 High-pressure crystal chemistry of MgSiO3 perovskite
 Sample: P = .001b GPa
;
_database_code_amcsd 0007484
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Mg Si O3'
_cell_length_a 4.777
_cell_length_b 4.927
_cell_length_c 6.89772
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 162.347
_exptl_crystal_density_diffrn      4.107
_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
_atom_site_U_iso_or_equiv
Mg   0.51310   0.55630   0.25000   0.01267
Si   0.50000   0.00000   0.50000   0.00836
O1   0.10310   0.46540   0.25000   0.00849
O2   0.19530   0.20100   0.55100   0.00836