data_9000715
_chemical_name '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 = 25 deg C
;
_chemical_formula_sum 'Al2 Si O5'
_cell_length_a 7.7980
_cell_length_b 7.9031
_cell_length_c 5.5566
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 342.444
_symmetry_space_group_name_H-M 'P n n m'
loop_
_symmetry_equiv_pos_as_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   0.37050   0.13910   0.50000
Si   0.24600   0.25200   0.00000
Oa   0.42460   0.36290   0.00000
Ob   0.10300   0.40030   0.00000
Oc   0.42330   0.36290   0.50000
Od   0.23050   0.13390   0.23940