data_global _chemical_name_mineral 'Abernathyite' loop_ _publ_author_name 'Ross M' 'Evans H T' _journal_name_full 'American Mineralogist' _journal_volume 49 _journal_year 1964 _journal_page_first 1578 _journal_page_last 1602 _publ_section_title ; Studies of the torbernite minerals (I): The crystal structure of abernathyite and the structurally related compounds NH4(UO2AsO4).3H2O and K(H3O)(UO2AsO4)2.6H2O Sample: Abernathyite - K(H3O) ; _database_code_amcsd 0000132 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'K.5 O9.5 H7.5 U As' _cell_length_a 7.171 _cell_length_b 7.171 _cell_length_c 18.048 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 928.087 _exptl_crystal_density_diffrn 3.522 _symmetry_space_group_name_H-M 'P 4/n c c' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-y,1/2-x,1/2+z' '1/2+y,1/2+x,1/2-z' '1/2+y,-x,-z' '1/2-y,x,z' 'x,1/2-y,1/2+z' '-x,1/2+y,1/2-z' '1/2+x,1/2+y,-z' '1/2-x,1/2-y,z' 'y,x,1/2+z' '-y,-x,1/2-z' '-y,1/2+x,-z' 'y,1/2-x,z' '1/2-x,y,1/2+z' '1/2+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 K 0.15000 0.99300 0.31500 0.12500 0.05193 Od 0.15000 0.99300 0.31500 0.12500 0.05193 Hd 0.15000 0.99300 0.31500 0.37500 0.05193 U 0.25000 0.25000 0.05200 1.00000 0.02875 As 0.75000 0.25000 0.00000 1.00000 0.02014 Oa 0.25000 0.25000 0.15000 1.00000 0.04559 Ob 0.25000 0.25000 0.95800 1.00000 0.03673 Oc 0.69600 0.07100 0.44800 1.00000 ? Watd 0.15000 0.99300 0.31500 0.75000 0.05193