#------------------------------------------------------------------------------
#$Date: 2016-02-14 16:26:36 +0200 (Sun, 14 Feb 2016) $
#$Revision: 176435 $
#$URL: svn://www.crystallography.net/cod/cif/1/00/90/1009029.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_1009029
loop_
_publ_author_name
'Peterson, S W'
'Levy, H A'
_publ_section_title
;
A single crystal neutron diffraction determination of the hydrogen
position in potassium bifluoride
;
_journal_coden_ASTM              JCPSA6
_journal_name_full               'Journal of Chemical Physics'
_journal_page_first              704
_journal_page_last               707
_journal_paper_doi               10.1063/1.1700520
_journal_volume                  20
_journal_year                    1952
_chemical_formula_structural     'K H F2'
_chemical_formula_sum            'F2 H K'
_chemical_name_systematic        'Potassium hydrogendifluoride - $-alpha'
_space_group_IT_number           140
_symmetry_cell_setting           tetragonal
_symmetry_Int_Tables_number      140
_symmetry_space_group_name_Hall  '-I 4 2c'
_symmetry_space_group_name_H-M   'I 4/m c m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.67
_cell_length_b                   5.67
_cell_length_c                   6.81
_cell_volume                     218.9
_cod_original_formula_sum        'H F2 K'
_cod_database_code               1009029
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x,-y,z
x,-y,1/2+z
-x,y,1/2+z
-y,x,z
y,-x,z
y,x,1/2+z
-y,-x,1/2+z
-x,-y,-z
x,y,-z
-x,y,1/2-z
x,-y,1/2-z
y,-x,-z
-y,x,-z
-y,-x,1/2-z
y,x,1/2-z
1/2+x,1/2+y,1/2+z
1/2-x,1/2-y,1/2+z
1/2+x,1/2-y,z
1/2-x,1/2+y,z
1/2-y,1/2+x,1/2+z
1/2+y,1/2-x,1/2+z
1/2+y,1/2+x,z
1/2-y,1/2-x,z
1/2-x,1/2-y,1/2-z
1/2+x,1/2+y,1/2-z
1/2-x,1/2+y,-z
1/2+x,1/2-y,-z
1/2+y,1/2-x,1/2-z
1/2-y,1/2+x,1/2-z
1/2-y,1/2-x,-z
1/2+y,1/2+x,-z
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
K1 K1+ 4 a 0. 0. 0.25 1. 0 d
H1 H1+ 4 d 0. 0.5 0. 1. 0 d
F1 F1- 8 h 0.1408 0.6408 0. 1. 0 d
loop_
_atom_type_symbol
_atom_type_oxidation_number
K1+ 1.000
H1+ 1.000
F1- -1.000
