data_global _chemical_name_mineral 'Metahohmannite' loop_ _publ_author_name 'Scordari F' 'Ventruti G' 'Gualtieri A F' _journal_name_full 'American Mineralogist' _journal_volume 89 _journal_year 2004 _journal_page_first 365 _journal_page_last 370 _publ_section_title ; The structure of metahohmannite, Fe2[O(SO4)2].4H2O, by in situ synchrotron powder diffraction ; _database_code_amcsd 0003421 _chemical_compound_source 'desert areas, northern Chile' _chemical_formula_sum 'Fe2 S2 O13 H8' _cell_length_a 7.3484 _cell_length_b 9.7710 _cell_length_c 7.1521 _cell_angle_alpha 91.684 _cell_angle_beta 98.523 _cell_angle_gamma 86.390 _cell_volume 506.746 _exptl_crystal_density_diffrn 2.568 _symmetry_space_group_name_H-M 'P -1' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Fe1 0.62200 0.46300 0.35600 0.02200 Fe2 0.63600 0.22600 0.70900 0.02200 S1 0.88500 0.18000 0.37400 0.01900 S2 0.34900 0.33300 0.00000 0.01900 O1 0.81600 0.14700 0.54800 0.02700 O2 0.08500 0.17000 0.41200 0.02700 O3 0.16300 0.67700 0.68200 0.02700 O4 0.78700 0.08300 0.24600 0.02700 O5 0.30900 0.45900 0.89000 0.02700 O6 0.50300 0.25300 0.93800 0.02700 O7 0.18500 0.25300 -0.02000 0.02700 O8 0.59700 0.63100 0.79700 0.02700 O9 0.50200 0.63100 0.45800 0.02700 Wat11 0.25100 0.95700 0.18000 0.02700 Wat12 0.59500 0.87100 0.39500 0.02700 Wat14 0.82100 0.55800 0.53300 0.02700 Wat16 0.86800 0.32000 0.82700 0.02700