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#$Date: 2016-02-20 00:53:41 +0000 (Sat, 20 Feb 2016) $
#$Revision: 176768 $
#$URL: svn://www.crystallography.net/cod/cif/2/10/15/2101586.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# 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_2101586
loop_
_publ_author_name
'Abrahams, S. C.'
_publ_section_title
;
 New ferroelectric inorganic materials predicted in point group
 4<i>mm</i>
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              790
_journal_page_last               805
_journal_paper_doi               10.1107/S0108768196004594
_journal_volume                  52
_journal_year                    1996
_chemical_formula_sum            'K2 Nb2 O14 Si4'
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P 4 -2ab'
_symmetry_space_group_name_H-M   'P 4 b m'
_cell_angle_alpha                90.0
_cell_angle_beta                 90.0
_cell_angle_gamma                90.0
_cell_length_a                   8.7404(8)
_cell_length_b                   8.7404(8)
_cell_length_c                   8.136
_cell_volume                     621.55(8)
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_cod_data_source_file            an0527.cif
_cod_data_source_block           AN0527l
_cod_database_code               2101586
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Nb1 .0 .0 .2333(2)
Nb2 .0 .0 .7367(2)
K .32260(10) .82260(10) .0092(3)
Si1 .1242(2) .6242(2) .3188(2)
Si2 .1240(2) .6240(2) .7111(2)
O1 .4251(4) .2882(4) .2503(4)
O2 .4219(5) .2892(5) .7827(5)
O3 .0 .0 .0173
O4 .0 .0 .5183(9)
O5 .1200(4) .6200(4) .5141(9)
O6 .5 .0 .24530(10)
O7 .5 .0 .7801(8)