The structure described by Al2O3 crystallizes in the orthorhombic Pnnm space group. Al(1) is bonded to one O(2) and three equivalent O(1) atoms to form corner-sharing AlO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to three equivalent Al(1) atoms. In the second O site, O(2) is bonded in a linear geometry to two equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Al2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.120
_cell_length_b   5.570
_cell_length_c   9.563
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   124.067
_symmetry_Int_Tables_number   1
_cell_volume   137.657
_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  0.017  0.517  0.325  1.0
  Al  Al1  1  0.983  0.483  0.675  1.0
  Al  Al2  1  0.017  0.017  0.175  1.0
  Al  Al3  1  0.983  0.983  0.825  1.0
  O  O4  1  0.376  0.876  0.247  1.0
  O  O5  1  0.000  0.000  0.000  1.0
  O  O6  1  0.624  0.624  0.747  1.0
  O  O7  1  0.376  0.376  0.253  1.0
  O  O8  1  0.624  0.124  0.753  1.0
  O  O9  1  0.000  0.500  0.500  1.0
[/CIF]
.
The structure described by Al2O3 crystallizes in the orthorhombic Pnnm space group. Al(1) is bonded to one O(2) and three equivalent O(1) atoms to form corner-sharing AlO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to three equivalent Al(1) atoms. In the second O site, O(2) is bonded in a linear geometry to two equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Al2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.120
_cell_length_b   5.570
_cell_length_c   9.563
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   124.067
_symmetry_Int_Tables_number   1
_cell_volume   137.657
_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  0.017  0.517  0.325  1.0
  Al  Al1  1  0.983  0.483  0.675  1.0
  Al  Al2  1  0.017  0.017  0.175  1.0
  Al  Al3  1  0.983  0.983  0.825  1.0
  O  O4  1  0.376  0.876  0.247  1.0
  O  O5  1  0.000  0.000  0.000  1.0
  O  O6  1  0.624  0.624  0.747  1.0
  O  O7  1  0.376  0.376  0.253  1.0
  O  O8  1  0.624  0.124  0.753  1.0
  O  O9  1  0.000  0.500  0.500  1.0
[/CIF]
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