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#$Date: 2016-02-13 14:50:18 +0200 (Sat, 13 Feb 2016) $
#$Revision: 176428 $
#$URL: svn://www.crystallography.net/cod/cif/1/52/13/1521356.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_1521356
loop_
_publ_author_name
'Kahlenberg, V.'
'Doersam, G.'
'Wendschuh-Josties, M.'
'Fischer, R.X.'
_publ_section_title
;
 The crystal structure of delta-(Na2 Si2 O5)
;
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              380
_journal_page_last               386
_journal_volume                  146
_journal_year                    1999
_chemical_formula_sum            'Na2 O5 Si2'
_chemical_name_systematic        'Na2 (Si2 O5)'
_space_group_IT_number           14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_cell_angle_alpha                90
_cell_angle_beta                 90.37
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.393
_cell_length_b                   12.083
_cell_length_c                   4.843
_cell_volume                     491.131
_citation_journal_id_ASTM        JSSCBI
_cod_data_source_file            Kahlenberg_JSSCBI_1999_272.cif
_cod_data_source_block           Na2O5Si2
_cod_original_sg_symbol_Hall     '-P 2ybc (x-z,y,z)'
_cod_database_code               1521356
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x+1/2,y+1/2,-z+1/2
-x,-y,-z
x-1/2,-y-1/2,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
O1 O-2 0.6356 -0.0546 0.7585 1 0.0
O3 O-2 0.6383 0.7966 0.3662 1 0.0
O5 O-2 0.1396 0.2088 0.2491 1 0.0
Si1 Si+4 0.9492 0.1974 0.3006 1 0.0
Na2 Na+1 0.8804 0.0381 0.7651 1 0.0
Na1 Na+1 0.6303 -0.0025 0.2435 1 0.0
O2 O-2 0.8871 0.0762 0.2503 1 0.0
O4 O-2 0.5747 0.7286 0.8654 1 0.0
Si2 Si+4 0.6764 0.8207 0.7007 1 0.0
