data_global
_amcsd_formula_title 'Ba Ge2.5 O9 Si1.5'
loop_
_publ_author_name
'Goreaud M'
'Choisnet J'
'Deschanvres A'
'Raveau B'
_journal_name_full 'Materials Research Bulletin'
_journal_volume 8 
_journal_year 1973
_journal_page_first 1205
_journal_page_last 1214
_publ_section_title
;
 Synthese et Evolution Structurale de Nouveaux Silicogermanates
 BaGe(Ge3-xSix)O9 de Type Benitoite et de Structure Apparentee
 _cod_database_code 1001065
;
_database_code_amcsd 0014236
_chemical_formula_sum 'Ba Si1.5 Ge2.5 O9'
_cell_length_a 6.667
_cell_length_b 6.667
_cell_length_c 9.703
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 373.506
_exptl_crystal_density_diffrn      4.490
_symmetry_space_group_name_H-M 'P -6 c 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,x-y,-z'
  '-x+y,-x,1/2-z'
  '-y,-x,1/2+z'
  '-y,x-y,z'
  '-x+y,y,-z'
  'x,y,1/2-z'
  'x,x-y,1/2+z'
  '-x+y,-x,z'
  '-y,-x,-z'
  '-y,x-y,1/2-z'
  '-x+y,y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Ba1   0.66667   0.33333   0.00000   1.00000
Si1   0.09930   0.31050   0.25000   0.50000
Ge1   0.33333   0.66667   0.00000   1.00000
Ge2   0.09930   0.31050   0.25000   0.50000
O1   0.23400   0.18820   0.25000   1.00000
O2   0.11290   0.45850   0.12030   1.00000