data_global _chemical_name_mineral 'Tantalite-(Mn)' loop_ _publ_author_name 'Grice J D' 'Ferguson R B' 'Hawthorne F C' _journal_name_full 'The Canadian Mineralogist' _journal_volume 14 _journal_year 1976 _journal_page_first 540 _journal_page_last 549 _publ_section_title ; The crystal structures of tantalite, ixiolite and wodginite from Bernic lake, Manitoba I. Tantalite and ixiolite ; _database_code_amcsd 0005131 _chemical_compound_source 'Bernic Lake, Manitoba, Canada' _chemical_formula_sum '(Mn.97 Ti.02 Fe.01) (Ta1.28 Nb.72) O6' _cell_length_a 14.413 _cell_length_b 5.760 _cell_length_c 5.084 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 422.068 _exptl_crystal_density_diffrn 7.071 _symmetry_space_group_name_H-M 'P b c 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 Mn 0.00000 0.32200 0.25000 0.97000 0.00798 Ti 0.00000 0.32200 0.25000 0.02000 0.00798 Fe 0.00000 0.32200 0.25000 0.01000 0.00798 Ta 0.16280 0.17700 0.73670 0.64000 0.00811 Nb 0.16280 0.17700 0.73670 0.36000 0.00811 O1 0.09900 0.09400 0.05500 1.00000 0.00507 O2 0.41900 0.11200 0.10800 1.00000 0.01646 O3 0.75800 0.12100 0.09900 1.00000 0.01140