data_global _chemical_name_mineral 'Aeschynite-(Y)' loop_ _publ_author_name 'Bonazzi P' 'Menchetti S' _journal_name_full 'European Journal of Mineralogy' _journal_volume 11 _journal_year 1999 _journal_page_first 1043 _journal_page_last 1049 _publ_section_title ; Crystal chemistry of aeschynite-(Y) from the Western Alps: residual electron density on difference-Fourier map Sample: TR2 ; _database_code_amcsd 0006809 _chemical_compound_source 'western Alps' _chemical_formula_sum 'Y.55 Ce.011 Pr.002 Nd.026 Sm.016 Gd.091 Dy.079 Er.034 Yb.022 Th.1 U.03 Ca.02 Ti1.81 Nb.09 Ta.01 W.11 O6' _cell_length_a 10.904 _cell_length_b 7.490 _cell_length_c 5.189 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 423.791 _exptl_crystal_density_diffrn 5.293 _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_occupancy _atom_site_U_iso_or_equiv YA 0.45130 0.25000 0.03440 0.55000 0.01880 CeA 0.45130 0.25000 0.03440 0.01100 0.01880 PrA 0.45130 0.25000 0.03440 0.00200 0.01880 NdA 0.45130 0.25000 0.03440 0.02600 0.01880 SmA 0.45130 0.25000 0.03440 0.01600 0.01880 GdA 0.45130 0.25000 0.03440 0.09100 0.01880 DyA 0.45130 0.25000 0.03440 0.07900 0.01880 ErA 0.45130 0.25000 0.03440 0.03400 0.01880 YbA 0.45130 0.25000 0.03440 0.02200 0.01880 ThA 0.45130 0.25000 0.03440 0.10000 0.01880 UA 0.45130 0.25000 0.03440 0.03000 0.01880 CaA 0.45130 0.25000 0.03440 0.02000 0.01880 TiB 0.35880 0.51190 0.54270 0.90500 0.02270 NbB 0.35880 0.51190 0.54270 0.04500 0.02270 TaB 0.35880 0.51190 0.54270 0.00500 0.02270 WB 0.35880 0.51190 0.54270 0.04500 0.02270 WC 0.17100 0.25000 0.60900 0.02000 0.02000 O1 0.28730 0.43810 0.87800 1.00000 0.02500 O2 0.52690 0.45760 0.73670 1.00000 0.02600 O3 0.61820 0.25000 0.31650 1.00000 0.02900 O4 0.35240 0.25000 0.43930 1.00000 0.02600