data_global
_amcsd_formula_title 'O5 Si Y2'
loop_
_publ_author_name
'Michel C'
'Buisson G'
'Bertaut E'
_journal_name_full 'Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences'
_journal_volume 264 
_journal_year 1967
_journal_page_first 397
_journal_page_last 399
_publ_section_title
;
 Structure de Y2 Si O5
 _cod_database_code 1001838
;
_database_code_amcsd 0012264
_chemical_formula_sum 'Y2 Si O5'
_cell_length_a 14.59
_cell_length_b 10.52
_cell_length_c 6.82
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 122.25
_cell_volume 885.291
_exptl_crystal_density_diffrn      4.290
_symmetry_space_group_name_H-M 'B 1 1 2/b'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,y,1/2+z'
  '-x,1/2-y,z'
  '1/2-x,1/2-y,1/2+z'
  'x,1/2+y,-z'
  '1/2+x,1/2+y,1/2-z'
  '-x,-y,-z'
  '1/2-x,-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Y1   0.53700  -0.03100   0.24100
Y2   0.35700  -0.33500   0.88000
Si1   0.31600  -0.30400   0.41400
O1   0.37400  -0.33400   0.21300
O2   0.40700  -0.15600   0.49200
O3   0.20400  -0.32500   0.37200
O4   0.31200  -0.40400   0.59400
O5   0.51900  -0.10600   0.91500