data_global
_chemical_name_mineral 'Enstatite'
loop_
_publ_author_name
'Hugh-Jones D A'
'Angel R J'
_journal_name_full 'American Mineralogist'
_journal_volume 79 
_journal_year 1994
_journal_page_first 405
_journal_page_last 410
_publ_section_title
;
 A compressional study of MgSiO3 orthoenstatite up to 8.5 GPa
 Sample: P = 3.27 GPa
;
_database_code_amcsd 0001647
_chemical_formula_sum 'Mg Si O3'
_cell_length_a 18.1045
_cell_length_b 8.7181
_cell_length_c 5.1327
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 810.129
_exptl_crystal_density_diffrn      3.292
_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
Mg1   0.37620   0.65570   0.85980   0.00494
Mg2   0.37740   0.48560   0.35320   0.00798
SiA   0.27150   0.34290   0.04470   0.00431
SiB   0.47290   0.33770   0.80150   0.00418
O1a   0.18240   0.33970   0.02700   0.00431
O2a   0.30970   0.50700   0.03700   0.00583
O3a   0.30350   0.22230   0.82500   0.00646
O1b   0.56200   0.34020   0.80700   0.00735
O2b   0.43220   0.48370   0.68700   0.00228
O3b   0.44640   0.19210   0.61200   0.00532