data_global
_chemical_name_mineral 'Gillespite'
loop_
_publ_author_name
'Hazen R M'
'Burnham C W'
_journal_name_full 'American Mineralogist'
_journal_volume 60 
_journal_year 1975
_journal_page_first 937
_journal_page_last 938
_publ_section_title
;
 The Crystal Structure of Gillespite II at 26 Kilobars: Correction and Addendum
;
_chemical_formula_sum 'Ba Fe Si4 O10'
_cell_length_a 7.349
_cell_length_b 7.515
_cell_length_c 7.894
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 435.968
_exptl_crystal_density_diffrn      3.546
_symmetry_space_group_name_H-M 'P 21 21 2'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,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
Ba   0.00000   0.00000  -0.01700   0.02077
Fe   0.00000   0.50000   0.15900   0.02026
SiA   0.68900   0.22400   0.32200   0.01267
SiB   0.26100   0.18800   0.29700   0.01773
O1   0.20800   0.26700   0.47900   0.00760
O2A   0.47400   0.22100   0.25500   0.01773
O2B   0.23600   0.97800   0.28500   0.05319
O3A   0.23200   0.62500   0.20700   0.00507
O3B   0.14300   0.28200   0.14800   0.00507