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: CE - note: O1 z coordinate altered to match reported bond lengths ; _database_code_amcsd 0006810 _chemical_compound_source 'western Alps' _chemical_formula_sum 'Y.61 Ce.001 Nd.005 Sm.013 Gd.056 Dy.076 Er.041 Yb.025 Th.04 U.08 Fe.01 Ti1.8 Nb.17 Ta.01 W.06 O6' _cell_length_a 10.881 _cell_length_b 7.484 _cell_length_c 5.156 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 419.871 _exptl_crystal_density_diffrn 5.206 _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 0.45060 0.25000 0.03580 0.61000 0.01110 CeA 0.45060 0.25000 0.03580 0.00100 0.01110 NdA 0.45060 0.25000 0.03580 0.00500 0.01110 SmA 0.45060 0.25000 0.03580 0.01300 0.01110 GdA 0.45060 0.25000 0.03580 0.05600 0.01110 DyA 0.45060 0.25000 0.03580 0.07600 0.01110 ErA 0.45060 0.25000 0.03580 0.04100 0.01110 YbA 0.45060 0.25000 0.03580 0.02500 0.01110 ThA 0.45060 0.25000 0.03580 0.04000 0.01110 UA 0.45060 0.25000 0.03580 0.08000 0.01110 FeA 0.45060 0.25000 0.03580 0.01000 0.01110 TiB 0.35890 0.51160 0.54400 0.90000 0.01520 NbB 0.35890 0.51160 0.54400 0.08500 0.01520 TaB 0.35890 0.51160 0.54400 0.00500 0.01520 WB 0.35890 0.51160 0.54400 0.01000 0.01520 WC 0.17800 0.25000 0.60200 0.04000 0.02400 O1 0.28720 0.43420 0.88070 1.00000 0.01600 O2 0.52610 0.45600 0.73880 1.00000 0.01700 O3 0.61770 0.25000 0.30870 1.00000 0.01800 O4 0.35270 0.25000 0.43320 1.00000 0.01500