data_global _chemical_name_mineral 'Gartrellite' loop_ _publ_author_name 'Krause W' 'Belendorff K' 'Bernhardt H J' 'McCammon C A' 'Effenberger H' 'Mikenda W' _journal_name_full 'European Journal of Mineralogy' _journal_volume 10 _journal_year 1998 _journal_page_first 179 _journal_page_last 206 _publ_section_title ; Crystal chemistry of the tsumcorite-group minerals. New data on ferrilotharmeyerite, tsumcorite, thometzekite, mounanaite, helmutwinklerite, and a redefinition of gartrellite ; _database_code_amcsd 0006711 _chemical_compound_source 'Tsumeb mine, Namibia' _chemical_formula_sum 'Pb Fe Cu As2 (O10 H2)' _cell_length_a 5.431 _cell_length_b 5.642 _cell_length_c 7.573 _cell_angle_alpha 67.62 _cell_angle_beta 69.57 _cell_angle_gamma 70.31 _cell_volume 195.422 _exptl_crystal_density_diffrn 5.425 _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 PbMe1 0.00000 0.00000 0.00000 0.00089 FeMe2 0.00000 0.50000 0.50000 0.01773 CuMe2 0.50000 0.00000 0.50000 0.01773 AsX 0.41000 0.43470 0.79200 0.01267 O-H1 0.14600 0.17100 0.41980 0.00785 O2 0.28400 0.30600 0.67020 0.00785 O3a 0.25100 0.68500 0.28150 0.00785 O3b 0.68600 0.23000 0.27230 0.00785 O4 0.26100 0.27500 0.03660 0.00785