data_global _chemical_name_mineral 'Richelsdorfite' loop_ _publ_author_name 'Susse P' 'Tillmann B' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 179 _journal_year 1987 _journal_page_first 323 _journal_page_last 334 _publ_section_title ; The crystal structure of the new mineral richelsdorfite, Ca2Cu5Sb(Cl/(OH)6/(AsO4)4)*6H2O ; _database_code_amcsd 0010965 _chemical_compound_source 'Iba, near Richelsdorf, Hessen, Germany' _chemical_formula_sum 'Ca2 Cu5 Sb As4 O28 Cl H18' _cell_length_a 14.079 _cell_length_b 14.203 _cell_length_c 13.470 _cell_angle_alpha 90 _cell_angle_beta 101.05 _cell_angle_gamma 90 _cell_volume 2643.579 _exptl_crystal_density_diffrn 3.319 _symmetry_space_group_name_H-M 'C 1 2/m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,z' '1/2+x,1/2-y,z' '-x,y,-z' '1/2-x,1/2+y,-z' '-x,-y,-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Ca 0.04080 0.24310 0.23200 0.01748 Cu1 0.29040 0.00000 0.23690 0.00887 Cu2 0.14520 0.38520 0.05700 0.01039 Cu3 0.37230 0.38670 0.05620 0.01013 Sb 0.25000 0.25000 0.50000 0.01672 As1 0.06730 0.00000 0.13190 0.00684 As2 0.48090 0.00000 0.13220 0.00671 As3 0.27350 0.20620 0.13240 0.00621 O1 0.11660 0.00000 0.02420 0.00659 O2 0.15380 0.00000 0.23610 0.01418 O3 0.00300 0.10100 0.12960 0.01760 O4 0.39670 0.00000 0.02270 0.00836 O5 0.42750 0.00000 0.23200 0.01013 O6 0.04530 0.39890 0.13580 0.01976 O7 0.28860 0.13860 0.23460 0.01570 O8 0.25650 0.14220 0.02470 0.01241 O9 0.16800 0.26700 0.12920 0.01431 O10 0.37600 0.26910 0.13260 0.01862 O-H11 0.36660 0.18170 0.48050 0.03407 O-H12 0.18390 0.21740 0.36170 0.01659 O-H13 0.30330 0.36330 0.44580 0.04863 Cl 0.27900 0.50000 0.15750 0.02609 Wat14 0.33070 0.00000 0.40470 0.03711 Wat15 0.10070 0.00000 0.42420 0.02799 Wat16 0.49880 0.15000 0.35130 0.03369 Wat17 0.47150 0.35250 0.34930 0.03724