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#$Date: 2010-06-10 18:11:07 +0300 (Thu, 10 Jun 2010) $
#$Revision: 1210 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9007431.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided the American Mineralogist Crystal Structure Database,
# http://rruff.geo.arizona.edu/AMS/amcsd.php
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_9007431
loop_
_publ_author_name
'Frazer, B. C.'
'Pepinsky, R.'
_publ_section_title
;
 X-ray analysis of the ferroelectric transition in KH2PO4
 Sample: at T = 126 K
 Locality: synthetic
;
_journal_name_full               'Acta Crystallographica'
_journal_page_first              273
_journal_page_last               285
_journal_volume                  6
_journal_year                    1953
_chemical_formula_sum            'H2 K O4 P'
_chemical_name_mineral           Archerite
_symmetry_space_group_name_H-M   'F -4 d 2'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   10.48
_cell_length_b                   10.48
_cell_length_c                   6.90
_cell_volume                     757.830
_diffrn_ambient_temperature      126
_exptl_crystal_density_diffrn    2.385
_[local]_cod_chemical_formula_sum_orig 'K P (O4 H2)'
_cod_database_code               9007431
_amcsd_database_code             AMCSD#0009092
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,1/2+y,1/2+z
1/2+x,y,1/2+z
1/2+x,1/2+y,z
1/4+y,1/4+x,3/4-z
1/4+y,3/4+x,1/4-z
3/4+y,1/4+x,1/4-z
3/4+y,3/4+x,3/4-z
1/4-x,1/4+y,3/4+z
1/4-x,3/4+y,1/4+z
3/4-x,1/4+y,1/4+z
3/4-x,3/4+y,3/4+z
1/4-y,1/4-x,3/4-z
1/4-y,3/4-x,1/4-z
3/4-y,1/4-x,1/4-z
3/4-y,3/4-x,3/4-z
1/4+x,1/4-y,3/4+z
1/4+x,3/4-y,1/4+z
3/4+x,1/4-y,1/4+z
3/4+x,3/4-y,3/4+z
1/2+y,-x,1/2-z
1/2+y,1/2-x,-z
+y,-x,-z
+y,1/2-x,1/2-z
1/2-x,-y,1/2+z
1/2-x,1/2-y,+z
-x,-y,+z
-x,1/2-y,1/2+z
1/2-y,x,1/2-z
1/2-y,1/2+x,-z
-y,x,-z
-y,1/2+x,1/2-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 0.00595
P 0.00000 0.00000 0.00000 1.00000 0.00507
O 0.11800 0.03300 0.13200 0.50000 0.00608
O-H 0.11800 0.03300 0.13200 0.50000 0.00608