data_global
_chemical_name_mineral 'Parauranophane'
loop_
_publ_author_name
'Barinova A V'
'Rastsvetaeva R K'
'Sidorenko G A'
'Verin I A'
_journal_name_full 'Crystallography Reports'
_journal_volume 48 
_journal_year 2003
_journal_page_first 12
_journal_page_last 15
_publ_section_title
;
 Crystal structure of beta-uranophane from the Transbaikal region and
 its relation to the structure of the alpha modification
;
_database_code_amcsd 0018734
_chemical_compound_source 'Transbaikal region, Russia'
_chemical_formula_sum 'Ca U2 Si2 O17 H12'
_cell_length_a 13.947
_cell_length_b 15.465
_cell_length_c 6.626
_cell_angle_alpha 90
_cell_angle_beta 91.399
_cell_angle_gamma 90
_cell_volume 1428.738
_exptl_crystal_density_diffrn      3.981
_symmetry_space_group_name_H-M 'P 1 21/a 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,z'
  '1/2-x,1/2+y,-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
Ca   0.19020   0.48560   0.28260   0.01646
U1   0.01920   0.26010   0.26270   0.01381
U2   0.23150   0.73950   0.47080   0.01216
Si1   0.01870   0.22300   0.72970   0.00925
Si2   0.26700   0.19450   0.06360   0.00709
O1   0.26520   0.35230   0.49270   0.01267
O2   0.99200   0.14910   0.23470   0.02052
O3   0.73210   0.87410   0.44010   0.01140
O4   0.04410   0.37240   0.28930   0.02153
O5   0.17940   0.22340   0.21140   0.01241
O6   0.89230   0.76390   0.41970   0.01735
O7   0.35790   0.20450   0.22000   0.01558
O8   0.56840   0.74920   0.42600   0.01646
O9   0.97950   0.71890   0.07180   0.01418
O10   0.72710   0.74680   0.13430   0.01254
O-H1   0.98570   0.88070   0.20990   0.02153
O-H2   0.74140   0.90740   0.00160   0.02406
Wat1   0.54260   0.94590   0.16560   0.02913
Wat2   0.36090   0.49060   0.32960   0.03926
Wat3   0.80440   0.59270   0.02550   0.03166
Wat4   0.87700   0.49920   0.37700   0.02786
Wat5   0.13030   0.00640   0.23710   0.04433