data_global
_chemical_name_mineral 'Enstatite'
loop_
_publ_author_name
'Ohashi Y'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 10 
_journal_year 1984
_journal_page_first 217
_journal_page_last 229
_publ_section_title
;
 Polysynthetically-twinned structures of enstatite and wollastonite
 Sample: OREN
;
_database_code_amcsd 0007358
_chemical_formula_sum 'Mg Si O3'
_cell_length_a 18.225
_cell_length_b 8.8128
_cell_length_c 5.180
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 831.977
_exptl_crystal_density_diffrn      3.206
_symmetry_space_group_name_H-M 'P b c a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '1/2-x,1/2+y,z'
  '1/2+x,1/2-y,-z'
  '1/2+x,y,1/2-z'
  '1/2-x,-y,1/2+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
MgM1   0.37584   0.65383   0.86600   0.00469
MgM2   0.37677   0.48687   0.35890   0.00722
SiA   0.27173   0.34155   0.05050   0.00355
SiB   0.47353   0.33739   0.79800   0.00342
O1A   0.18343   0.33980   0.03470   0.00481
O2A   0.31106   0.50230   0.04330   0.00595
O3A   0.30322   0.22270   0.83110   0.00583
O1B   0.56243   0.34020   0.80010   0.00494
O2B   0.43258   0.48270   0.68950   0.00583
O3B   0.44742   0.19520   0.60390   0.00519