data_global
_chemical_name_mineral 'Bridgmanite'
loop_
_publ_author_name
'Horiuchi H'
'Ito E'
'Weidner D J'
_journal_name_full 'American Mineralogist'
_journal_volume 72 
_journal_year 1987
_journal_page_first 357
_journal_page_last 360
_publ_section_title
;
 Perovskite-type MgSiO3: Single-crystal X-ray diffraction study
;
_database_code_amcsd 0001071
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Mg Si O3'
_cell_length_a 4.7754
_cell_length_b 4.9292
_cell_length_c 6.8969
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 162.345
_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
Mg   0.51410   0.55600   0.25000
Si   0.50000   0.00000   0.50000
O1   0.10280   0.46600   0.25000
O2   0.19610   0.20140   0.55310
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Mg 0.00555 0.00565 0.00619 0.00052 0.00000 0.00000
Si 0.00342 0.00367 0.00241 -0.00005 0.00003 -0.00016
O1 0.00434 0.00581 0.00217 0.00013 0.00000 0.00000
O2 0.00430 0.00449 0.00431 0.00083 0.00048 0.00083