data_global _chemical_name_mineral 'Gjerdingenite-Fe' loop_ _publ_author_name 'Raade G' 'Ferraris G' 'Gula A' 'Ivaldi G' _journal_name_full 'The Canadian Mineralogist' _journal_volume 40 _journal_year 2002 _journal_page_first 1629 _journal_page_last 1639 _publ_section_title ; Gjerdingenite-Fe from Norway, a new mineral species in the labuntsovite group: Description, crystal structure and twinning ; _database_code_amcsd 0005798 _chemical_compound_source 'Norway' _chemical_formula_sum 'K2.52 Na.72 O34.74 Ca.02 Fe.56 Mn.38 Nb2.16 Ti1.72 Zr.04 Si8 H13.48' _cell_length_a 14.529 _cell_length_b 13.943 _cell_length_c 7.837 _cell_angle_alpha 90 _cell_angle_beta 117.61 _cell_angle_gamma 90 _cell_volume 1406.811 _exptl_crystal_density_diffrn 2.948 _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 KB 0.43070 0.03230 0.73100 0.30000 0.07800 NaB 0.43070 0.03230 0.73100 0.18000 0.07800 WatB 0.43070 0.03230 0.73100 0.52000 0.07800 KB* 0.50000 0.83120 0.00000 0.52000 0.08400 WatB* 0.50000 0.83120 0.00000 0.48000 0.08400 WatC 0.08990 0.00000 0.33500 0.85000 0.07900 KC 0.08990 0.00000 0.33500 0.14000 0.07900 CaC 0.08990 0.00000 0.33500 0.01000 0.07900 FeD 0.00000 0.00000 0.50000 0.48000 0.01600 MnD 0.00000 0.00000 0.50000 0.38000 0.01600 NbM1 0.00000 0.76760 0.50000 0.54000 0.01910 TiM1 0.00000 0.76760 0.50000 0.43000 0.01910 FeM1 0.00000 0.76760 0.50000 0.02000 0.01910 ZrM1 0.00000 0.76760 0.50000 0.01000 0.01910 NbM2 0.75000 0.75000 0.50000 0.54000 0.02040 TiM2 0.75000 0.75000 0.50000 0.43000 0.02040 FeM2 0.75000 0.75000 0.50000 0.02000 0.02040 ZrM2 0.75000 0.75000 0.50000 0.01000 0.02040 Si1 0.20790 0.10910 0.79980 1.00000 0.01430 Si2 0.68520 0.88970 0.75420 1.00000 0.01470 O1 0.90320 0.77040 0.61130 1.00000 0.01700 O2 0.91610 0.88220 0.33080 1.00000 0.01600 O3 0.25980 0.87050 0.37870 1.00000 0.01800 O4 0.27210 0.81980 0.73340 1.00000 0.01800 O5 0.41520 0.82098 0.30320 1.00000 0.02200 O6 0.35570 0.00000 0.27100 1.00000 0.01200 O7 0.23310 0.87210 0.02600 1.00000 0.02000 O8 0.24220 0.00000 0.78440 1.00000 0.02000 Wat 0.00000 0.14000 0.00000 1.00000 0.10200