data_2003122
_journal_name_full     'Acta Crystallographica, Section B'
_journal_year     1998
_journal_volume     B54
_journal_page_first     809
_journal_page_last     818
_chemical_formula_sum     'As F4 H2 K O2'
_symmetry_cell_setting     monoclinic
_symmetry_space_group_name_H-M     'C 2/c'
_symmetry_space_group_name_Hall     '-C 2yc'
_cell_length_a     4.8180(10)
_cell_length_b     16.001(4)
_cell_length_c     6.374(2)
_cell_angle_alpha     90
_cell_angle_beta     99.36(2)
_cell_angle_gamma     90
_cell_volume     484.8(2)
_cell_formula_units_Z     4
_diffrn_radiation_type     'Ag K\a'
_diffrn_radiation_wavelength     0.5609
loop_
    _atom_site_label
    _atom_site_fract_x
    _atom_site_fract_y
    _atom_site_fract_z
    _atom_site_U_iso_or_equiv
    As 0.000 0.63103(2) 0.25 ?
    K 0.5 0.59091(7) 0.75 ?
    F1 -0.0994(5) 0.62720(10)
                            0.4993(3) ?
    F2 0.2376(5) 0.55190(10)
                           0.3314(4) ?
    O3 0.2594(6) 0.7042(2) 0.3346(5) ?