data_global _chemical_name_mineral 'Conichalcite' loop_ _publ_author_name 'Qurashi M M' 'Barnes W H' _journal_name_full 'The Canadian Mineralogist' _journal_volume 7 _journal_year 1963 _journal_page_first 561 _journal_page_last 577 _publ_section_title ; The structures of the minerals of the descloizite and adelite groups: IV - descloizite and conichalcite (part 2) The structure of conichalcite ; _database_code_amcsd 0005080 _chemical_formula_sum 'Ca Cu As O5 H' _cell_length_a 7.40 _cell_length_b 5.84 _cell_length_c 9.21 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 398.019 _exptl_crystal_density_diffrn 4.331 _symmetry_space_group_name_H-M 'P 21 21 21' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,1/2+y,1/2-z' '1/2+x,1/2-y,-z' '1/2-x,-y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Ca 0.11600 0.26900 0.42500 0.00253 Cu 0.00000 0.00000 0.75000 0.01203 As 0.36800 -0.23300 0.58000 0.00937 O1 0.18700 -0.25600 0.70000 0.01267 O2 0.53800 -0.17600 0.69400 0.01267 O3 0.37800 0.50900 0.48900 0.01267 O4 0.36800 -0.01600 0.47400 0.01267 O-H5 0.15100 0.25000 0.68000 0.01267