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