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#$Date: 2018-09-27 07:13:35 +0300 (Thu, 27 Sep 2018) $
#$Revision: 211196 $
#$URL: file:///home/coder/svn-repositories/cod/cif/1/54/12/1541218.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_1541218
loop_
_publ_author_name
'Mazza, D.'
'Vallino, M.'
'Busca, G.'
_publ_section_title
;
 Mullite-type structures in the system Al2O3-Me2O (Me= Na, K) and
 Al2O3-B2O3
;
_journal_name_full               'Journal of the American Ceramic Society'
_journal_page_first              1929
_journal_page_last               1934
_journal_volume                  75
_journal_year                    1992
_chemical_formula_sum            'Al6 Na O9.5'
_space_group_IT_number           55
_symmetry_space_group_name_Hall  '-P 2 2ab'
_symmetry_space_group_name_H-M   'P b a m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            1
_cell_length_a                   7.64
_cell_length_b                   7.64
_cell_length_c                   2.937
_cell_volume                     171.432
_citation_journal_id_ASTM        JACTAW
_cod_data_source_file            Mazza_JACTAW_1992_1562.cif
_cod_data_source_block           Al6Na1O9.5
_cod_original_cell_volume        171.4315
_cod_original_formula_sum        'Al6 Na1 O9.5'
_cod_database_code               1541218
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x,-y,z
x+1/2,-y+1/2,-z
-x+1/2,y+1/2,-z
-x,-y,-z
x,y,-z
-x-1/2,y-1/2,z
x-1/2,-y-1/2,z
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
Na1 Na+1 0.37 0.09 0.5 0.25 0.0
Al1 Al+3 0 0 0 1 0.0
O1 O-2 0.12 0.21 0 1 0.0
Al2 Al+3 0.27 0.3 0.5 0.35 0.0
O2 O-2 0.36 0.42 0.5 1 0.0
Al3 Al+3 0.16 0.33 0.5 0.65 0.0
O3 O-2 0.5 0 0.5 0.75 0.0
