data_global
_amcsd_formula_title 'Gd2Si2O7'
loop_
_publ_author_name
'Smolin Y I'
'Shepelev Y F'
_journal_name_full 'Acta Crystallographica, Section B'
_journal_volume 26 
_journal_year 1970
_journal_page_first 484
_journal_page_last 492
_publ_section_title
;
 The crystal structures of the rare earth pyrosilicates
;
_database_code_amcsd 0009372
_chemical_formula_sum 'Gd2 Si2 O7'
_cell_length_a 13.87
_cell_length_b 5.073
_cell_length_c 8.33
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 586.120
_exptl_crystal_density_diffrn      5.470
_symmetry_space_group_name_H-M 'P n a 21'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,z'
  '1/2-x,1/2+y,1/2+z'
  '-x,-y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Gd1   0.12551   0.33730   0.99831   0.00481
Gd2   0.12564   0.33739   0.51409   0.00456
Si1   0.32050   0.37440   0.25050   0.00393
Si2   0.53900   0.62530   0.24980   0.00215
O1   0.27150   0.47690   0.08760   0.00735
O2   0.26580   0.48570   0.41300   0.00431
O3   0.34570   0.07060   0.24650   0.00557
O4   0.42110   0.55570   0.24480   0.00291
O5   0.54720   0.78580   0.08660   0.00773
O6   0.54560   0.78820   0.42060   0.00925
O7   0.59880   0.35260   0.25600   0.00760