data_global
_chemical_name_mineral 'Geschieberite'
loop_
_publ_author_name
'Niinisto L'
'Toivonen J'
'Valkonen J'
_journal_name_full 'Acta Chemica Scandinavica'
_journal_volume A33 
_journal_year 1979
_journal_page_first 621
_journal_page_last 624
_publ_section_title
;
 Uranyl(VI) compounds. II. The crystal structure of
 potassium uranyl sulfate dihydrate, K2UO2(SO4)2*2H2O
;
_database_code_amcsd 0020637
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'K2 U S2 O12 H4'
_cell_length_a 13.806
_cell_length_b 11.577
_cell_length_c 7.292
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1165.495
_exptl_crystal_density_diffrn      3.285
_symmetry_space_group_name_H-M 'P n m a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,z'
  '-x,1/2+y,-z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '1/2+x,y,1/2-z'
  '1/2-x,-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
K   0.42980   0.46240   0.23800 ?
U   0.74460   0.25000   0.58570 ?
S   0.67610   0.47010   0.25630 ?
O1   0.61730   0.25000   0.60570   0.01400
O2   0.87020   0.25000   0.57000   0.01400
O3   0.75120   0.43570   0.70950   0.01300
O4   0.74050   0.37460   0.32780   0.01200
O5   0.60530   0.51090   0.39260   0.02300
O6   0.62880   0.42930   0.08750   0.02000
Wat7   0.73690   0.25000   0.93050   0.01800
Wat8   0.43340   0.25000   0.39560   0.04200
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
K 0.01480 0.04430 0.02110 0.00250 -0.00030 0.00610
U 0.01060 0.00380 0.00670 0.00000 -0.00030 0.00000
S 0.01480 0.00800 0.00870 0.00010 -0.00060 0.00070