data_global
_chemical_name_mineral 'Andalusite'
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 = 600 deg C
;
_database_code_amcsd 0000730
_chemical_formula_sum 'Al2 Si O5'
_cell_length_a 7.8556
_cell_length_b 7.9424
_cell_length_c 5.5642
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 347.163
_exptl_crystal_density_diffrn      3.100
_symmetry_space_group_name_H-M 'P n n m'
loop_
_space_group_symop_operation_xyz
  'x,y,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,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  'x,y,-z'
  '-x,-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   0.24190
Al2   0.37180   0.13980   0.50000
Si   0.24620   0.25410   0.00000
Oa   0.42360   0.36460   0.00000
Ob   0.10310   0.40080   0.00000
Oc   0.42490   0.36300   0.50000
Od   0.23290   0.13640   0.23920
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 0.02157 0.01790 0.00769 0.00664 0.00000 0.00000
Al2 0.00844 0.01438 0.01020 -0.00063 0.00000 0.00000
Si 0.00813 0.01246 0.00894 0.00032 0.00000 0.00000
Oa 0.01094 0.01758 0.01051 -0.00379 0.00000 0.00000
Ob 0.01000 0.01406 0.03372 0.00126 0.00000 0.00000
Oc 0.01501 0.01438 0.01098 -0.00284 0.00000 0.00000
Od 0.01532 0.02013 0.01129 -0.00348 -0.00332 0.00313