data_global _chemical_name_mineral 'Seidozerite' loop_ _publ_author_name 'Skszat S M' 'Simonov V I' _journal_name_full 'Soviet Physics Crystallography' _journal_volume 10 _journal_year 1966 _journal_page_first 505 _journal_page_last 508 _publ_section_title ; The structure of calcium seidozerite ; _database_code_amcsd 0015550 _chemical_compound_source 'Baikal area, Russia' _chemical_formula_sum 'Zr1.4 Mn.56 Fe.42 Ti.78 Ca1.28 Na3.56 Si4 O16 F2' _cell_length_a 5.54 _cell_length_b 7.10 _cell_length_c 18.36 _cell_angle_alpha 90 _cell_angle_beta 102.40 _cell_angle_gamma 90 _cell_volume 705.326 _exptl_crystal_density_diffrn 3.573 _symmetry_space_group_name_H-M 'P 1 2/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,-y,1/2+z' '-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 Zr 0.19800 0.11800 0.07390 0.70000 0.01773 Mn 0.19800 0.11800 0.07390 0.20000 0.01773 Fe 0.19800 0.11800 0.07390 0.10000 0.01773 Ti 0.00000 0.10900 0.25000 0.78000 0.01267 Fe 0.00000 0.10900 0.25000 0.22000 0.01267 Ca 0.50000 0.34800 0.25000 0.84000 0.01267 Mn 0.50000 0.34800 0.25000 0.16000 0.01267 NaI 0.20200 0.61100 0.06930 0.78000 0.02026 Ca 0.20200 0.61100 0.06930 0.22000 0.02026 NaII 0.00000 0.60900 0.25000 1.00000 0.01393 NaIII 0.50000 0.85000 0.25000 1.00000 0.01900 SiI 0.72300 0.38500 0.10420 1.00000 0.00887 SiII 0.72200 0.83900 0.10530 1.00000 0.01140 OI 0.73600 0.61100 0.10800 1.00000 0.01900 OII 0.44000 0.31800 0.06500 1.00000 0.01773 OIII 0.44000 0.90300 0.07600 1.00000 0.01140 OIV 0.91900 0.31400 0.05600 1.00000 0.01140 OV 0.90000 0.90900 0.05100 1.00000 0.01267 OVI 0.78700 0.30600 0.18800 1.00000 0.01140 OVII 0.81600 0.91900 0.18700 1.00000 0.01520 OVIII 0.24100 0.12700 0.18300 1.00000 0.02026 F,OH 0.30200 0.57000 0.19100 1.00000 0.00887