The crystal structure described by Al2O3 crystallizes in the monoclinic C2/c space group. Al(1) is bonded to two equivalent O(2) and three equivalent O(1) atoms to form a mixture of edge and corner-sharing AlO5 trigonal bipyramids. There are two inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to three equivalent Al(1) atoms. In the second O site, O(2) is bonded in a see-saw-like geometry to four equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_Al2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.341
_cell_length_b   5.146
_cell_length_c   5.914
_cell_angle_alpha   123.466
_cell_angle_beta   150.968
_cell_angle_gamma   50.900
_symmetry_Int_Tables_number   1
_cell_volume   118.530
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Al  Al0  1  0.073  0.250  0.815  1.0
  Al  Al1  1  0.927  0.750  0.185  1.0
  Al  Al2  1  0.258  0.750  0.185  1.0
  Al  Al3  1  0.742  0.250  0.815  1.0
  O  O4  1  0.181  0.782  0.788  1.0
  O  O5  1  0.043  0.250  0.085  1.0
  O  O6  1  0.607  0.718  0.788  1.0
  O  O7  1  0.819  0.218  0.212  1.0
  O  O8  1  0.957  0.750  0.915  1.0
  O  O9  1  0.393  0.282  0.212  1.0
[/CIF]
.
The crystal structure described by Al2O3 crystallizes in the monoclinic C2/c space group. Al(1) is bonded to two equivalent O(2) and three equivalent O(1) atoms to form a mixture of edge and corner-sharing AlO5 trigonal bipyramids. There are two inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to three equivalent Al(1) atoms. In the second O site, O(2) is bonded in a see-saw-like geometry to four equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_Al2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.341
_cell_length_b   5.146
_cell_length_c   5.914
_cell_angle_alpha   123.466
_cell_angle_beta   150.968
_cell_angle_gamma   50.900
_symmetry_Int_Tables_number   1
_cell_volume   118.530
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Al  Al0  1  0.073  0.250  0.815  1.0
  Al  Al1  1  0.927  0.750  0.185  1.0
  Al  Al2  1  0.258  0.750  0.185  1.0
  Al  Al3  1  0.742  0.250  0.815  1.0
  O  O4  1  0.181  0.782  0.788  1.0
  O  O5  1  0.043  0.250  0.085  1.0
  O  O6  1  0.607  0.718  0.788  1.0
  O  O7  1  0.819  0.218  0.212  1.0
  O  O8  1  0.957  0.750  0.915  1.0
  O  O9  1  0.393  0.282  0.212  1.0
[/CIF]
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