data_global _chemical_name_mineral 'Phoenicochroite' loop_ _publ_author_name 'Williams S A' 'McLean W J' 'Anthony J W' _journal_name_full 'American Mineralogist' _journal_volume 55 _journal_year 1970 _journal_page_first 784 _journal_page_last 792 _publ_section_title ; A study of phoenicochroite - its structure and properties ; _database_code_amcsd 0000204 _chemical_formula_sum 'Pb2 Cr O5' _cell_length_a 14.001 _cell_length_b 5.675 _cell_length_c 7.137 _cell_angle_alpha 90 _cell_angle_beta 115.22 _cell_angle_gamma 90 _cell_volume 513.021 _exptl_crystal_density_diffrn 7.074 _symmetry_space_group_name_H-M 'C 1 2/m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,z' '1/2+x,1/2-y,z' '-x,y,-z' '1/2-x,1/2+y,-z' '-x,-y,-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Pb1 0.47940 0.00000 0.23280 0.01039 Pb2 0.35690 0.50000 0.38700 0.01191 Cr 0.16930 0.00000 0.15930 0.01229 O1 0.09300 0.00000 0.89840 0.03546 O2 0.29890 0.00000 0.20050 0.01773 O3 0.14480 0.23450 0.26620 0.03293 O4 0.50000 0.24130 0.50000 0.02533