data_9009362 _chemical_name 'Vigezzite' loop_ _publ_author_name 'Giuseppetti G' 'Tadini P' _journal_name_full "Neues Jahrbuch fur Mineralogie, Monatshefte" _journal_volume 1990 _journal_year 1990 _journal_page_first 301 _journal_page_last 308 _publ_section_title ; The crystal structure of vigezzite, (Ca,Ce)(Nb,Ta,Ti)2O6, intermediate term of the aeschynite series Locality: Vigezzo Valley, Novara, Italy ; _chemical_formula_sum '(Ca.75 Ce.25) (Nb.95 Ta.63 Ti.42) O6' _cell_length_a 11.065 _cell_length_b 7.527 _cell_length_c 5.343 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 444.998 _symmetry_space_group_name_H-M 'P n m a' loop_ _symmetry_equiv_pos_as_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_Uiso_or_equiv CaA 0.45650 0.25000 0.03910 0.75000 0.01191 CeA 0.45650 0.25000 0.03910 0.25000 0.01191 NbB 0.35870 0.50610 0.53820 0.47500 0.01203 TaB 0.35870 0.50610 0.53820 0.31500 0.01203 TiB 0.35870 0.50610 0.53820 0.21000 0.01203 O1 0.28750 0.43900 0.87220 1.00000 0.01381 O2 0.52510 0.45830 0.73000 1.00000 0.01292 O3 0.62230 0.25000 0.33450 1.00000 0.01355 O4 0.35450 0.25000 0.44850 1.00000 0.01330