data_global _chemical_name_mineral 'Maucherite' loop_ _publ_author_name 'Fleet M E' _journal_name_full 'American Mineralogist' _journal_volume 58 _journal_year 1973 _journal_page_first 203 _journal_page_last 210 _publ_section_title ; The crystal structure of maucherite (Ni11As8) ; _database_code_amcsd 0000306 _chemical_formula_sum 'Ni11 As8' _cell_length_a 6.8724 _cell_length_b 6.8724 _cell_length_c 21.821 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1030.603 _exptl_crystal_density_diffrn 8.024 _symmetry_space_group_name_H-M 'P 41 21 2' loop_ _space_group_symop_operation_xyz 'x,y,z' 'y,x,-z' '1/2-y,1/2+x,1/4+z' '1/2-x,1/2+y,1/4-z' '-x,-y,1/2+z' '-y,-x,1/2-z' '1/2+y,1/2-x,3/4+z' '1/2+x,1/2-y,3/4-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Ni1 0.12500 0.37300 0.26860 0.00836 Ni2 0.37500 0.37500 0.00000 0.00545 Ni3 0.12000 0.56900 0.17340 0.00443 Ni4 0.60800 0.56200 0.17100 0.00443 Ni5 0.37200 0.68300 0.08050 0.00443 Ni6 0.87100 0.69000 0.07700 0.00443 As1 0.12000 0.12000 0.00000 0.00545 As2 0.63500 0.63500 0.00000 0.00545 As3 0.63500 0.12900 0.00040 0.00545 As4 0.87700 0.38200 0.12500 0.00405 As5 0.12100 0.86900 0.12890 0.00405