data_global _chemical_name_mineral 'Mimetite' loop_ _publ_author_name 'Sokolova E V' 'Egorov-Tismenko Y K' _journal_name_full 'Vestnik Moskovskogo Universiteta Geologiya' _journal_volume 37 _journal_year 1982 _journal_page_first 50 _journal_page_last 56 _publ_section_title ; Study of crystalline structures of rare arsentates: duftite and mimetite ; _database_code_amcsd 0020489 _chemical_compound_source 'Cassiterite-sulfide field, Festivalnyi, East Siberia, Russia' _chemical_formula_sum 'Pb5 As3 O12 Cl' _cell_length_a 10.248 _cell_length_b 10.248 _cell_length_c 7.441 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 676.769 _exptl_crystal_density_diffrn 7.303 _symmetry_space_group_name_H-M 'P 63/m' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x+y,-x,1/2-z' 'x-y,x,1/2+z' 'y,-x+y,-z' '-y,x-y,z' 'x,y,1/2-z' '-x,-y,1/2+z' 'x-y,x,-z' '-x+y,-x,z' '-y,x-y,1/2-z' 'y,-x+y,1/2+z' '-x,-y,-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 Pb1 0.99610 0.74940 0.25000 1.00000 0.01634 Pb2 0.33333 0.66667 0.00730 1.00000 0.01330 As 0.40900 0.02500 0.25000 1.00000 0.00507 O1 0.17400 0.49300 0.25000 1.00000 0.03800 O2 0.59800 0.11100 0.25000 1.00000 0.03420 O3 0.35300 0.09100 0.07000 1.00000 0.04813 Cl 0.00000 0.00000 0.57200 0.50000 0.05446