#------------------------------------------------------------------------------
#$Date: 2016-02-13 14:50:18 +0200 (Sat, 13 Feb 2016) $
#$Revision: 176428 $
#$URL: svn://www.crystallography.net/cod/cif/1/53/30/1533028.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_1533028
loop_
_publ_author_name
'Rakic, S.'
'Kahlenberg, V.'
'Schmidt, B.C.'
_publ_section_title
;
 Hydrothermal synthesis and structural characterization of kappa-(Na2 Si
 O5) and Na1.84 K0.16 Si2 O5
;
_journal_name_full               'Solid State Sciences'
_journal_page_first              473
_journal_page_last               480
_journal_volume                  5
_journal_year                    2003
_chemical_formula_sum            'Na2 O5 Si2'
_chemical_name_systematic        'Na2 (Si2 O5)'
_space_group_IT_number           33
_symmetry_space_group_name_Hall  'P -2ac -2n'
_symmetry_space_group_name_H-M   'P n 21 a'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.128
_cell_length_b                   4.8322
_cell_length_c                   11.977
_cell_volume                     470.410
_citation_journal_id_ASTM        SSSCFJ
_cod_data_source_file            Rakic_SSSCFJ_2003_1011.cif
_cod_data_source_block           Na2O5Si2
_cod_original_cell_volume        470.4101
_cod_original_sg_symbol_Hall     'P 2c -2n (-x,z,y)'
_cod_database_code               1533028
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x,y+1/2,-z
-x+1/2,y+1/2,z+1/2
x+1/2,y,-z+1/2
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Si2 Si+4 0.0528 0.5254 0.9324 1 0.0
O4 O-2 -0.0553 0.9649 0.4867 1 0.0
Na1 Na+1 -0.065 0.0727 0.7728 1 0.0
O2 O-2 -0.0263 0.5879 0.8162 1 0.0
O3 O-2 0.1644 0.0791 0.649 1 0.0
Si1 Si+4 0.1081 0.1388 0.5256 1 0.0
O1 O-2 -0.0273 0.6983 0.0365 1 0.0
Na2 Na+1 0.189 0.5978 0.6911 1 0.0
O5 O-2 0.2509 0.5837 0.9303 1 0.0
