#------------------------------------------------------------------------------
#$Date: 2023-03-24 18:37:27 +0200 (Fri, 24 Mar 2023) $
#$Revision: 282053 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/00/07/9000712.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_9000712
loop_
_publ_author_name
'Winter, J. K.'
'Ghose, S.'
_publ_section_title
;
 Thermal expansion and high-temperature crystal chemistry of the Al2SiO5
 polymorphs
 T = 600 deg C
;
_journal_name_full               'American Mineralogist'
_journal_page_first              573
_journal_page_last               586
_journal_volume                  64
_journal_year                    1979
_chemical_formula_sum            'Al2 O5 Si'
_chemical_name_mineral           Sillimanite
_space_group_IT_number           62
_symmetry_space_group_name_Hall  '-P 2c 2ab'
_symmetry_space_group_name_H-M   'P b n m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   7.4967
_cell_length_b                   7.7136
_cell_length_c                   5.7921
_cell_volume                     334.937
_database_code_amcsd             0000725
_diffrn_ambient_temperature      873.15
_exptl_crystal_density_diffrn    3.214
_cod_original_formula_sum        'Al2 Si O5'
_cod_database_code               9000712
loop_
_space_group_symop_operation_xyz
x,y,z
x,y,1/2-z
-x,-y,1/2+z
1/2+x,1/2-y,1/2+z
1/2-x,1/2+y,1/2-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
Al1 0.00883 0.01296 0.01156 0.00000 -0.00022 -0.00023
Al2 0.00968 0.01356 0.01258 -0.00059 0.00000 0.00000
Si 0.00854 0.01206 0.01139 -0.00146 0.00000 0.00000
O1 0.00940 0.01899 0.01428 -0.00469 0.00000 0.00000
O2 0.00940 0.01869 0.01462 -0.00352 0.00000 0.00000
O3 0.02306 0.02411 0.03110 -0.01377 0.00000 0.00000
O4 0.01737 0.01447 0.01241 -0.00469 -0.00066 0.00000
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Al1 0.00000 0.00000 0.00000
Al2 0.14140 0.34590 0.25000
Si 0.15250 0.34080 0.75000
O1 0.35970 0.41000 0.75000
O2 0.35680 0.43490 0.25000
O3 0.47710 0.00130 0.75000
O4 0.12470 0.22450 0.51420