data_global _chemical_name_mineral 'Conichalcite' loop_ _publ_author_name 'Sakai S' 'Yoshiasa A' 'Sugiyama K' 'Miyawaki R' _journal_name_full 'Journal of Mineralogical and Petrological Sciences' _journal_volume 104 _journal_year 2009 _journal_page_first 125 _journal_page_last 131 _publ_section_title ; Crystal structure and chemistry of conichalcite, CaCu(AsO4)(OH) ; _database_code_amcsd 0018380 _chemical_compound_source 'Higgins mine, Arizona, USA' _chemical_formula_sum 'Ca (Cu.96 Mg.04) As O5 H' _cell_length_a 7.3849 _cell_length_b 5.8379 _cell_length_c 9.1937 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 396.362 _exptl_crystal_density_diffrn 4.323 _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_occupancy _atom_site_U_iso_or_equiv Ca 0.11680 0.27060 0.42580 1.00000 0.00820 Cu 0.00500 -0.00040 0.74940 0.96000 0.00930 Mg 0.00500 -0.00040 0.74940 0.04000 0.00930 As 0.36810 -0.23500 0.58020 1.00000 0.00810 O1 0.18840 -0.25500 0.69830 1.00000 0.01100 O2 0.54100 -0.16700 0.69120 1.00000 0.01600 O3 0.38700 0.51400 0.49080 1.00000 0.01500 O4 0.35500 -0.00700 0.46970 1.00000 0.01200 O5 0.13900 0.25400 0.68140 1.00000 0.01000 H 0.25000 0.26000 0.72000 1.00000 0.03000