data_9009511 _chemical_name 'Duftite' loop_ _publ_author_name 'Kharisun' 'Taylor M R' 'Bevan D J M' 'Pring A' _journal_name_full "Mineralogical Magazine" _journal_volume 62 _journal_year 1998 _journal_page_first 121 _journal_page_last 130 _publ_section_title ; The crystal chemistry of duftite, PbCuAsO4(OH) and the beta-duftite problem Note: sample is synthetic ; _chemical_formula_sum 'Pb Cu As O5 H' _cell_length_a 7.768 _cell_length_b 9.211 _cell_length_c 5.999 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 429.235 _symmetry_space_group_name_H-M 'P 21 21 21' loop_ _symmetry_equiv_pos_as_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_Uiso_or_equiv Pb 0.37640 0.16680 0.47930 ? Cu 0.25560 0.49630 0.75370 ? As 0.36860 -0.19340 0.50760 ? O2 0.14200 0.28500 0.76500 0.01700 O3 0.12600 0.30500 0.24100 0.01200 O4 0.54100 -0.08500 0.49400 0.01200 O5 0.19700 -0.08500 0.53800 0.02000 O-H1 0.38500 0.43800 0.49700 0.00800