#------------------------------------------------------------------------------
#$Date: 2016-02-20 01:53:41 +0100 (Sat 20 de Feb de 2016) $
#$Revision: 176768 $
#$URL: svn://www.crystallography.net/cod/cif/2/10/10/2101077.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_2101077
loop_
_publ_author_name
'Fábry, J.'
'Breczewski, T.'
'Madariaga, G.'
_publ_section_title
;
 Structure determination of the ferroelastic phase of K₃Na(CrO₄)₂
 at 200 and 230 K and the redetermination of its parent phase at 290 K
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              13
_journal_page_last               22
_journal_paper_doi               10.1107/S0108768193008079
_journal_volume                  50
_journal_year                    1994
_chemical_formula_sum            'Cr2 K3 Na O8'
_chemical_formula_weight         372.29
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  '-P 3 2"'
_symmetry_space_group_name_H-M   'P -3 m 1'
_cell_angle_alpha                90.0
_cell_angle_beta                 90.0
_cell_angle_gamma                120.0
_cell_formula_units_Z            1
_cell_length_a                   5.857(3)
_cell_length_b                   5.857(3)
_cell_length_c                   7.521(2)
_cell_volume                     223.44(17)
_diffrn_radiation_type           Mo
_diffrn_radiation_wavelength     0.71073
_exptl_absorpt_coefficient_mu    3.833
_exptl_crystal_density_diffrn    2.766
_exptl_crystal_F_000             180
_cod_data_source_file            al0554.cif
_cod_data_source_block           al0554a
_cod_original_cell_volume        223.4
_cod_database_code               2101077
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Cr .3333 .6667 .27344(7)
K(1) .3333 .6667 .83260(10)
K(2) .0 .0 .5
Na .0 .0 .0
O(1) .3333 .6667 .4877(7)
O(2) .18136(15) .3627(3) .1972(3)
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
O(1) Cr O(2) 110.41(7)
O(1) Cr O(2)xvi 110.41(7)
O(1) Cr O(2)xvii 110.41(7)
O(2) Cr O(2)xvi 108.52(6)
O(2) Cr O(2)xvii 108.52(6)
O(2)xvi Cr O(2)xvii 108.52(6)
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
K(1) O(2)v 2.940(2)
K(1) O(2)vi 2.940(2)
K(1) O(2)ii 2.940(2)
K(1) O(2)iii 2.940(2)
K(1) O(2)viii 2.940(2)
K(1) O(2)ix 2.940(2)
K(1) O(2)iv 3.146(2)
K(1) O(2)vii 3.146(2)
K(1) O(2)i 3.146(2)
K(2) O(2) 2.928(2)
K(2) O(2)v 2.928(2)
K(2) O(2)xv 2.928(2)
K(2) O(2)xi 2.928(2)
K(2) O(2)xii 2.928(2)
K(2) O(2)vii 2.928(2)
K(2) O(1)xi 3.38220(10)
K(2) O(1)xii 3.38220(10)
K(2) O(1) 3.38220(10)
K(2) O(1)xv 3.38220(10)
K(2) O(1)viii 3.38220(10)
K(2) O(1)v 3.38220(10)
Na O(2) 2.363(2)
Na O(2)xiv 2.363(2)
Na O(2)xiv 2.363(2)
Na O(2)x 2.363(2)
Na O(2)xi 2.363(2)
Na O(2)xii 2.363(2)
Na O(2)xiii 2.363(2)
Cr O(1) 1.611(5)
Cr O(2) 1.645(2)
Cr O(2)xvi 1.645(2)
Cr O(2)xvii 1.645(2)
