data_global _chemical_name_mineral 'Alunite' loop_ _publ_author_name 'Pabst A' _journal_name_full 'American Mineralogist' _journal_volume 32 _journal_year 1947 _journal_page_first 16 _journal_page_last 30 _publ_section_title ; Some computations on svanbergite, woodhouseite and alunite ; _database_code_amcsd 37 _chemical_formula_sum 'K Al3 S2 O14 H6' _cell_length_a 7.058 _cell_length_b 7.058 _cell_length_c 7.058 _cell_angle_alpha 59.08 _cell_angle_beta 59.08 _cell_angle_gamma 59.08 _cell_volume 243.402 _exptl_crystal_density_diffrn 2.826 _symmetry_space_group_name_H-M 'R -3 m ' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-z,-y' '-z,-x,-y' 'y,x,z' 'y,z,x' '-z,-y,-x' '-x,-y,-z' 'x,z,y' 'z,x,y' '-y,-x,-z' '-y,-z,-x' 'z,y,x' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z K 0.0 0.0 0.0 Al 0.5 0.0 0.0 S 0.305 0.305 0.305 O1 0.393 0.393 0.393 O2 0.512 0.157 0.157 O-H3 -0.174 0.276 0.276