#------------------------------------------------------------------------------
#$Date: 2012-02-28 17:44:07 +0200 (Tue, 28 Feb 2012) $
#$Revision: 35913 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/01/10/9011085.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided the American Mineralogist Crystal Structure Database,
# http://rruff.geo.arizona.edu/AMS/amcsd.php
#
# 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_9011085
loop_
_publ_author_name
'Pant, A. K.'
_publ_section_title
;
 A reconsideration of the crystal structure of beta-Na2Si2O5
;
_journal_name_full               'Acta Crystallographica, Section B'
_journal_page_first              1077
_journal_page_last               1083
_journal_volume                  24
_journal_year                    1968
_chemical_formula_sum            'Na2 O5 Si2'
_chemical_name_mineral           Natrosilite
_space_group_IT_number           14
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 1'
_cell_angle_alpha                90
_cell_angle_beta                 104.24
_cell_angle_gamma                90
_cell_length_a                   12.329
_cell_length_b                   4.848
_cell_length_c                   8.133
_cell_volume                     471.181
_exptl_crystal_density_diffrn    2.568
_[local]_cod_chemical_formula_sum_orig 'Na2 Si2 O5'
_cod_database_code               9011085
_amcsd_database_code             AMCSD#0009273
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2-y,z
1/2-x,1/2+y,-z
-x,-y,-z
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Na1 0.01630 0.01180 0.01100 -0.00080 0.00110 0.00010
Na2 0.01290 0.01190 0.01510 0.00020 0.00490 0.00090
Si1 0.00650 0.00460 0.00570 0.00020 0.00110 -0.00020
Si2 0.00810 0.00410 0.00480 0.00020 0.00150 -0.00070
O1 0.01080 0.00580 0.01520 0.00210 0.00560 -0.00080
O2 0.01610 0.00600 0.00910 -0.00040 0.00570 -0.00240
O3 0.01030 0.01370 0.00620 -0.00010 0.00080 -0.00210
O4 0.00470 0.00570 0.00560 0.00080 0.00210 -0.00070
O5 0.01090 0.01120 0.00770 0.00100 0.00080 0.00090
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Na1 0.44362 0.75331 0.37932
Na2 0.47262 0.22518 0.13722
Si1 0.18240 0.18422 0.02770
Si2 0.27681 0.29480 0.40291
O1 0.21462 -0.14126 0.01551
O2 0.26717 0.62025 0.45371
O3 0.18097 0.24614 0.22574
O4 0.40078 0.23205 0.39106
O5 0.06384 0.24500 -0.09331