#------------------------------------------------------------------------------
#$Date: 2008-01-14 00:15:36 +0200 (Mon, 14 Jan 2008) $
#$Revision: 14 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9000710.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_9000710
_chemical_name 'Sillimanite'
loop_
_publ_author_name
'Winter J K'
'Ghose S'
_journal_name_full "American Mineralogist"
_journal_volume 64
_journal_year 1979
_journal_page_first 573
_journal_page_last 586
_publ_section_title
;
 Thermal expansion and high-temperature crystal chemistry of the Al2SiO5
 polymorphs
 T = 25 deg C
;
_chemical_formula_sum 'Al2 Si O5'
_cell_length_a 7.4883
_cell_length_b 7.6808
_cell_length_c 5.7774
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 332.294
_symmetry_space_group_name_H-M 'P b n m'
loop_
_symmetry_equiv_pos_as_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_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Al1   0.00000   0.00000   0.00000
Al2   0.14170   0.34490   0.25000
Si   0.15330   0.34020   0.75000
O1   0.36050   0.40940   0.75000
O2   0.35690   0.43410   0.25000
O3   0.47630   0.00150   0.75000
O4   0.12520   0.22300   0.51450