data_global
_amcsd_formula_title 'La2 O9 Si Ti2'
loop_
_publ_author_name
'Benbertal D'
'Mosset A'
'Trombe J'
_journal_name_full 'Materials Research Bulletin'
_journal_volume 29 
_journal_year 1994
_journal_page_first 47
_journal_page_last 54
_publ_section_title
;
 Synthese et structure cristalline d'un nouveau silicate de lanthane et de titane
 _cod_database_code 1008953
;
_database_code_amcsd 0016819
_chemical_formula_sum 'La2 Ti2 Si O9'
_cell_length_a 17.02899
_cell_length_b 5.7415
_cell_length_c 7.631
_cell_angle_alpha 90
_cell_angle_beta 111.221
_cell_angle_gamma 90
_cell_volume 695.506
_exptl_crystal_density_diffrn      5.211
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
La1   0.21084   0.00000   0.30163
La2   0.39449   0.50000   0.30461
Ti1   0.50000   0.25810   0.00000
Ti2   0.41795   0.00000   0.54940
Si1   0.33880   0.00000   0.02010
O1   0.38320   0.24470  -0.01190
O2   0.24550   0.00000   0.86800
O3   0.34630   0.00000   0.23660
O4   0.33970   0.23880   0.51790
O5   0.52500   0.50000   0.17910
O6   0.50000   0.22080   0.50000
O7   0.47280   0.00000   0.81490