data_global
_amcsd_formula_title 'As2O(SO4)2'
loop_
_publ_author_name
'Marsh R E'
'Herbstein F H'
_journal_name_full 'Acta Crystallographica, Section B'
_journal_volume 44 
_journal_year 1988
_journal_page_first 77
_journal_page_last 88
_publ_section_title
;
 More space-group changes
;
_database_code_amcsd 0009816
_chemical_formula_sum 'As2 S2 O9'
_cell_length_a 6.650
_cell_length_b 6.671
_cell_length_c 16.612
_cell_angle_alpha 90
_cell_angle_beta 94.34
_cell_angle_gamma 90
_cell_volume 734.831
_exptl_crystal_density_diffrn      3.236
_symmetry_space_group_name_H-M 'P 1 21/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
As1   0.30120   0.26600   0.03510   0.01590
As2   0.18490   0.12270   0.20690   0.01850
S1  -0.14740   0.22570   0.07110   0.01730
S2   0.27570   0.57400   0.17560   0.02060
O1   0.32550   0.11980   0.12250   0.02090
O2   0.02830   0.24360   0.01700   0.03580
O3  -0.06610   0.12050   0.14720   0.04370
O4  -0.29200   0.09500   0.03120   0.04440
O5  -0.22490   0.41370   0.08840   0.05880
O6   0.28890   0.50890   0.08910   0.03340
O7   0.18550   0.39710   0.22170   0.05390
O8   0.13100   0.72700   0.17430   0.04110
O9   0.47000   0.61980   0.20760   0.07460