data_global _chemical_name_mineral 'Francevillite' loop_ _publ_author_name 'Mereiter K' _journal_name_full 'Neues Jahrbuch fur Mineralogie, Monatshefte' _journal_volume 1986 _journal_year 1986 _journal_page_first 552 _journal_page_last 560 _publ_section_title ; Crystal structure refinement of two francevillites, (Ba,Pb)[(UO2)2V2O8]*5H2O ; _database_code_amcsd 0014807 _chemical_compound_source 'Mounana, near Franceville, Gabon' _chemical_formula_sum '(Ba.69 Pb.31) U2 V2 O17 H10' _cell_length_a 10.479 _cell_length_b 8.450 _cell_length_c 16.645 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1473.874 _exptl_crystal_density_diffrn 4.592 _symmetry_space_group_name_H-M 'P c a n' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,y,1/2+z' 'x,-y,1/2-z' '1/2+x,1/2-y,z' '1/2-x,1/2+y,-z' '1/2+x,1/2+y,1/2-z' '1/2-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_occupancy _atom_site_U_iso_or_equiv Ba 0.33909 0.00000 0.25000 0.69000 0.04053 Pb 0.33909 0.00000 0.25000 0.31000 0.04053 U 0.18468 0.02088 -0.00357 1.00000 0.01811 V 0.03180 0.34726 0.04300 1.00000 0.02204 O1 0.16950 0.06060 -0.10870 1.00000 0.03166 O2 0.20230 -0.02350 0.10240 1.00000 0.02786 O3 -0.00300 0.35910 0.13630 1.00000 0.03800 O4 -0.09800 0.43880 -0.01880 1.00000 0.02406 O5 -0.01290 0.15240 0.01300 1.00000 0.02533 O6 0.19970 0.29040 0.03330 1.00000 0.02280 Wat7 0.25600 0.30040 0.22510 1.00000 0.05699 Wat8 0.52100 0.19000 0.32250 1.00000 0.05953 Wat9 0.03230 0.00000 0.25000 1.00000 0.06839 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 Ba 0.05294 0.03888 0.02977 0.00000 0.00000 0.00241 Pb 0.05294 0.03888 0.02977 0.00000 0.00000 0.00241 U 0.01596 0.01773 0.02393 0.00101 0.00140 -0.00076 V 0.02014 0.01761 0.02862 0.00063 0.00558 0.00177