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: MI ; _database_code_amcsd 0006808 _chemical_compound_source 'western Alps' _chemical_formula_sum 'Y.54 La.001 Ce.009 Pr.003 Nd.032 Sm.034 Gd.072 Dy.071 Er.043 Yb.03 Th.12 U.02 Ca.01 (Ti1.95 Nb.03 W.02) O6.02' _cell_length_a 10.803 _cell_length_b 7.532 _cell_length_c 5.180 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 421.487 _exptl_crystal_density_diffrn 5.105 _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 0.45030 0.25000 0.03050 0.54000 0.00750 LaA 0.45030 0.25000 0.03050 0.00100 0.00750 CeA 0.45030 0.25000 0.03050 0.00900 0.00750 PrA 0.45030 0.25000 0.03050 0.00300 0.00750 NdA 0.45030 0.25000 0.03050 0.03200 0.00750 SmA 0.45030 0.25000 0.03050 0.03400 0.00750 GdA 0.45030 0.25000 0.03050 0.07200 0.00750 DyA 0.45030 0.25000 0.03050 0.07100 0.00750 ErA 0.45030 0.25000 0.03050 0.04300 0.00750 YbA 0.45030 0.25000 0.03050 0.03000 0.00750 ThA 0.45030 0.25000 0.03050 0.12000 0.00750 UA 0.45030 0.25000 0.03050 0.02000 0.00750 CaA 0.45030 0.25000 0.03050 0.01000 0.00750 TiB 0.35950 0.51530 0.54360 0.97500 0.01220 NbB 0.35950 0.51530 0.54360 0.01500 0.01220 WB 0.35950 0.51530 0.54360 0.01000 0.01220 OC 0.17800 0.25000 0.59800 0.02000 0.01100 O1 0.28650 0.43700 0.87720 1.00000 0.01400 O2 0.52610 0.45710 0.73530 1.00000 0.01600 O3 0.62040 0.25000 0.31330 1.00000 0.01600 O4 0.34840 0.25000 0.43760 1.00000 0.01600