data_9009822 _chemical_name 'Linarite' loop_ _publ_author_name 'Effenberger H' _journal_name_full "Mineralogy and Petrology" _journal_volume 36 _journal_year 1987 _journal_page_first 3 _journal_page_last 12 _publ_section_title ; Crystal structure and chemical formula of schmiederite, Pb2Cu2(OH)4(SeO3)(SeO4) with a comparison to linarite PbCu(OH)2(SO4) Locality: Leadhills, Scotland ; _chemical_formula_sum 'Pb Cu S O6 H2' _cell_length_a 9.701 _cell_length_b 5.650 _cell_length_c 4.690 _cell_angle_alpha 90 _cell_angle_beta 102.65 _cell_angle_gamma 90 _cell_volume 250.822 _symmetry_space_group_name_H-M 'P 1 21/m 1' loop_ _symmetry_equiv_pos_as_xyz 'x,y,z' 'x,1/2-y,z' '-x,1/2+y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Pb 0.34201 0.25000 0.32838 Cu 0.00000 0.00000 0.00000 S 0.33190 0.75000 0.88450 O1 0.47540 0.75000 0.06560 O2 0.33470 0.75000 0.56930 O3 0.25310 0.53550 0.94260 O-H4 0.03420 0.75000 0.28640 O-H5 0.09520 0.25000 0.26670