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 a modification ; _database_code_amcsd 0018695 _chemical_compound_source 'Streltsovkii ore field, 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 91.300 _cell_angle_gamma 90 _cell_volume 1428.796 _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 U(1) 0.01920 0.26010 0.26270 0.01381 U(2) 0.23150 0.73950 0.47080 0.01216 Si(1) 0.01870 0.22300 0.72970 0.00925 Si(2) 0.26700 0.19450 0.06360 0.00709 O(1) 0.26520 0.35230 0.49270 0.01267 O(2) 0.99200 0.14910 0.23470 0.02052 O(3) 0.73210 0.87410 0.44010 0.01140 O(4) 0.04410 0.37240 0.28930 0.02153 O(5) 0.17940 0.22340 0.21140 0.01241 O(6) 0.89230 0.76390 0.41970 0.01735 O(7) 0.35790 0.20450 0.22000 0.01558 O(8) 0.56840 0.74920 0.42600 0.01646 O(9) 0.97950 0.71890 0.07180 0.01418 O(10) 0.72710 0.74680 0.13430 0.01254 O-H(1) 0.98570 0.88070 0.20990 0.02153 O-H(2) 0.74140 0.90740 0.00160 0.02406 Wat(1) 0.54260 0.94590 0.16560 0.02913 Wat(2) 0.36090 0.49060 0.32960 0.03926 Wat(3) 0.80440 0.59270 0.02550 0.03166 Wat(4) 0.87700 0.49920 0.37700 0.02786 Wat(5) 0.13030 0.00640 0.23710 0.04433