data_global _chemical_name_mineral 'Winchite' loop_ _publ_author_name 'Sokolova E V' 'Hawthorne F C' 'Gorbatova V' 'McCammon C' 'Schneider J' _journal_name_full 'The Canadian Mineralogist' _journal_volume 39 _journal_year 2001 _journal_page_first 171 _journal_page_last 177 _publ_section_title ; Ferrian winchite from the Ilmen mountains, southern Urals, Russia and some problems with the current scheme for amphibole nomenclature Note: x-coordinate of T1 and all coordinates of O6 adjusted to match reported bond lengths ; _database_code_amcsd 0005710 _chemical_compound_source 'Ilmen mountains, southern Urals, Russia' _chemical_formula_sum 'K.13 (Ca.66 Na1.34) Mg2.79 Fe1.92 Al.32 Ti.01 Mn.07 Si7.88 O23.77 (F.23 H1.77)' _cell_length_a 9.8339 _cell_length_b 18.0357 _cell_length_c 5.2974 _cell_angle_alpha 90 _cell_angle_beta 104.195 _cell_angle_gamma 90 _cell_volume 910.866 _exptl_crystal_density_diffrn 3.129 _symmetry_space_group_name_H-M 'C 1 2/m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,z' '1/2+x,1/2-y,z' '-x,y,-z' '1/2-x,1/2+y,-z' '-x,-y,-z' '1/2-x,1/2-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 KA 0.00000 0.50000 0.00000 0.13000 0.02533 CaM4 0.00000 0.27610 0.50000 0.33000 0.01773 NaM4 0.00000 0.27610 0.50000 0.67000 0.01773 MgM1 0.00000 0.08870 0.50000 1.00000 0.00760 Fe3+M2 0.00000 0.17840 0.00000 0.46000 0.00760 Fe2+M2 0.00000 0.17840 0.00000 0.43500 0.00760 AlM2 0.00000 0.17840 0.00000 0.10000 0.00760 TiM2 0.00000 0.17840 0.00000 0.00500 0.00760 MgM3 0.00000 0.00000 0.00000 0.79000 0.00380 Fe2+M3 0.00000 0.00000 0.00000 0.13000 0.00380 MnM3 0.00000 0.00000 0.00000 0.07000 0.00380 SiT1 0.28500 0.08580 0.30200 0.97000 0.01267 AlT1 0.28500 0.08580 0.30200 0.03000 0.01267 SiT2 0.28900 0.17460 0.80100 1.00000 0.01013 O1 0.11100 0.08900 0.21600 1.00000 0.00887 O2 0.11900 0.17400 0.73000 1.00000 0.01773 O-H3 0.10700 0.00000 0.70900 0.88500 0.00760 F3 0.10700 0.00000 0.70900 0.11500 0.00760 O4 0.36600 0.25130 0.78900 1.00000 0.02153 O5 0.35100 0.12540 0.07700 1.00000 0.01520 O6 0.33400 0.11600 0.60200 1.00000 0.02026 O7 0.34500 0.00000 0.31900 1.00000 0.01646