data_global _chemical_name_mineral 'Polkanovite' loop_ _publ_author_name 'Lambert-Andron B' 'Dhahri E' 'Chaudouet P' 'Madar R' _journal_name_full 'Journal of the Less-Common Metals' _journal_volume 108 _journal_year 1985 _journal_page_first 353 _journal_page_last 358 _publ_section_title ; Crystal structure of Rh12As7 ; _database_code_amcsd 0014153 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Rh6 As3.5' _cell_length_a 9.315 _cell_length_b 9.315 _cell_length_c 3.659 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 274.953 _exptl_crystal_density_diffrn 10.625 _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 Rh1 0.51580 0.38020 0.25000 1.00000 Rh2 0.24360 0.00860 0.25000 1.00000 As1 0.28550 0.44590 0.25000 1.00000 As2 0.00000 0.00000 0.25000 0.30000 As3 0.00000 0.00000 0.00000 0.20000 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Rh1 0.00663 0.00656 0.00977 0.00692 0.00000 0.00000 Rh2 0.01886 0.00745 0.00746 0.01253 0.00000 0.00000 As1 0.00429 0.00626 0.00760 0.00396 0.00000 0.00000 As2 0.01517 0.01517 0.09156 0.01517 0.00000 0.00000 As3 0.00056 0.00056 0.14447 0.00056 0.00000 0.00000