data_global _chemical_name_mineral 'Tamarugite' loop_ _publ_author_name 'Robinson P D' 'Fang J H' _journal_name_full 'American Mineralogist' _journal_volume 54 _journal_year 1969 _journal_page_first 19 _journal_page_last 30 _publ_section_title ; Crystal structures and mineral chemistry of double-salt hydrates: I. Direct determination of the crystal structure of tamarugite ; _database_code_amcsd 186 _chemical_formula_sum 'Na Al S2 O14 H12' _cell_length_a 7.353 _cell_length_b 25.225 _cell_length_c 6.097 _cell_angle_alpha 90.0 _cell_angle_beta 95.2 _cell_angle_gamma 90.0 _cell_volume 1126.214 _exptl_crystal_density_diffrn 2.065 _symmetry_space_group_name_H-M 'P 1 21/a 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,z' '1/2-x,1/2+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 Na 0.6169 0.0525 0.195 0.0228 Al 0.1424 0.1454 0.6785 0.0114 S1 0.6427 0.183 0.2097 0.0152 S2 0.7076 0.0204 0.7515 0.0152 O1 0.5594 0.2214 0.0424 0.02406 O2 0.8171 0.1621 0.1392 0.02406 O3 0.5159 0.1391 0.2373 0.02913 O4 0.6811 0.2112 0.4229 0.0228 O5 0.2929 0.04 0.2612 0.02533 O6 0.7571 0.0421 0.538 0.0266 O7 0.5208 0.0381 0.7938 0.019 O8 0.8391 0.0384 0.9326 0.019 Wat1 0.1232 0.187 0.4182 0.019 Wat2 0.0611 0.0881 0.4987 0.0228 Wat3 0.3837 0.126 0.6365 0.019 Wat4 0.902 0.1636 0.7299 0.01773 Wat5 0.2358 0.202 0.8446 0.02406 Wat6 0.1389 0.1 0.9307 0.0304