data_global _chemical_name_mineral 'Nielsbohrite' loop_ _publ_author_name 'Walenta K' 'Hatert F' 'Theye T' 'Lissner F' 'Roller K' _journal_name_full 'European Journal of Mineralogy' _journal_volume 21 _journal_year 2009 _journal_page_first 515 _journal_page_last 520 _publ_section_title ; Nielsbohrite, a new potassium uranyl arsenate from the uranium deposit of Menzenschwand, southern Black Forest, Germany ; _database_code_amcsd 0007287 _chemical_compound_source 'Menzenschwand, southern Black Forest, Germany' _chemical_formula_sum 'K U3 As O15 H6' _cell_length_a 8.193 _cell_length_b 11.430 _cell_length_c 13.500 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1264.221 _exptl_crystal_density_diffrn 5.644 _symmetry_space_group_name_H-M 'C c c m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '-x,y,1/2-z' '1/2-x,1/2+y,1/2-z' '-x,y,1/2+z' '1/2-x,1/2+y,1/2+z' 'x,-y,1/2-z' '1/2+x,1/2-y,1/2-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_occupancy _atom_site_U_iso_or_equiv K 0.00000 0.00000 0.50000 1.00000 0.04100 U1 0.25000 0.25000 0.36478 1.00000 0.03080 U2 0.00000 0.50000 0.50000 1.00000 0.03340 As 0.00000 0.50000 0.25000 1.00000 0.04920 O1 0.11300 0.42330 0.32720 1.00000 0.04900 O2 0.06600 -0.17160 0.13390 1.00000 0.04100 O-H3 0.67700 -0.14600 -3.50000 1.00000 0.06200 O4 -0.17200 0.39900 0.50000 1.00000 0.04800 Wat5 0.00000 0.00000 0.25000 1.00000 0.02300 O-H6a 0.25000 -0.25000 0.38160 0.67000 0.00500 O-H6b 0.25000 -0.25000 0.31500 0.33000 0.00500