data_global _chemical_name_mineral 'Brochantite' loop_ _publ_author_name 'Merlino S' 'Perchiazzi N' 'Franco D' _journal_name_full 'European Journal of Mineralogy' _journal_volume 15 _journal_year 2003 _journal_page_first 267 _journal_page_last 275 _publ_section_title ; Brochantite, Cu4SO4(OH)6: OD character, polytypism and crystal structures Sample: MDO_1 polytype ; _database_code_amcsd 0006971 _chemical_compound_source 'Val Fucinaia, Tuscany, Italy' _chemical_formula_sum 'Cu4 S (O10 H6)' _cell_length_a 13.140 _cell_length_b 9.863 _cell_length_c 6.024 _cell_angle_alpha 90 _cell_angle_beta 103.16 _cell_angle_gamma 90 _cell_volume 760.206 _exptl_crystal_density_diffrn 3.952 _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 Cu1 0.20610 0.99110 0.47990 0.02070 Cu2 0.20230 0.99080 -0.02370 0.02440 Cu3 0.11810 0.26140 0.18190 0.01850 Cu4 0.11990 0.25710 0.68480 0.01970 S 0.38770 0.19890 0.31670 0.02330 O-H1 0.09360 0.13250 0.41700 0.02200 O-H2 0.08270 0.13450 -0.08200 0.02200 O-H3 0.15900 0.38230 0.45400 0.02100 O-H4 0.15560 0.38260 -0.05200 0.02000 O-H5 0.25590 0.09360 0.75800 0.02200 O-H6 0.14280 0.89910 0.19800 0.02300 O7 0.27970 0.14500 0.26000 0.02700 O8 0.38220 0.35100 0.31200 0.02800 O9 0.44350 0.14900 0.14200 0.02900 O10 0.44150 0.15200 0.54700 0.02600