data_9000309 _chemical_name 'Parkerite' loop_ _publ_author_name 'Fleet M E' _journal_name_full "American Mineralogist" _journal_volume 58 _journal_year 1973 _journal_page_first 435 _journal_page_last 439 _publ_section_title ; The crystal structure of parkerite (Ni3Bi2S2) ; _chemical_formula_sum 'Ni1.5 Bi S' _cell_length_a 5.545 _cell_length_b 5.731 _cell_length_c 4.052 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 128.766 _symmetry_space_group_name_H-M 'P m a m' loop_ _symmetry_equiv_pos_as_xyz 'x,y,z' 'x,y,-z' '-x,-y,z' '1/2-x,y,z' '1/2+x,-y,-z' '1/2+x,-y,z' '1/2-x,y,-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_Uiso_or_equiv Ni1 0.00000 0.00000 0.50000 1.00000 0.01165 Ni2 0.25000 0.20400 0.00000 0.50000 0.01165 Bi 0.25000 0.74230 0.00000 1.00000 ? S 0.25000 0.25600 0.50000 1.00000 ?