data_global
_chemical_name_mineral 'Gillespite'
loop_
_publ_author_name
'Pabst A'
_journal_name_full 'American Mineralogist'
_journal_volume 28 
_journal_year 1943
_journal_page_first 372
_journal_page_last 390
_publ_section_title
;
 Crystal structure of gillespite, BaFeSi4O10
;
_chemical_formula_sum 'Ba Fe Si4 O10'
_cell_length_a 7.495
_cell_length_b 7.495
_cell_length_c 16.050
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 901.609
_exptl_crystal_density_diffrn      3.429
_symmetry_space_group_name_H-M 'P 4/n c c'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2-y,1/2-x,1/2+z'
  'y,x,1/2-z'
  'y,-x,-z'
  '1/2-y,1/2+x,z'
  'x,-y,1/2+z'
  '1/2-x,1/2+y,1/2-z'
  '1/2+x,1/2+y,-z'
  '-x,-y,z'
  '1/2+y,1/2+x,1/2+z'
  '-y,-x,1/2-z'
  '-y,x,-z'
  '1/2+y,1/2-x,z'
  '-x,y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Ba   0.00000   0.00000   0.00000
Fe   0.00000   0.50000   0.09000
Si   0.27000   0.17500   0.15500
O1   0.21500   0.21500   0.25000
O2   0.46500   0.24000   0.14000
O3   0.13500   0.27500   0.09000