The crystal structure described by AlOOH crystallizes in the triclinic P1 space group. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. In the second Al site, Al(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing AlO6 octahedra. The corner-sharing octahedral tilt angles are 17°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a linear geometry to one O(3) and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Al(1), two equivalent Al(2), and one H(1) atom. In the second O site, O(2) is bonded to two equivalent Al(1) and two equivalent Al(2) atoms to form corner-sharing OAl4 tetrahedra. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Al(1) and one H(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Al(2) and one H(2) atom. is represented by the CIF card [CIF]
data_AlHO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.963
_cell_length_b   3.738
_cell_length_c   6.804
_cell_angle_alpha   99.747
_cell_angle_beta   101.644
_cell_angle_gamma   89.636
_symmetry_Int_Tables_number   1
_cell_volume   72.705
_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  0.630  0.205  0.327  1.0
  Al  Al1  1  0.300  0.796  0.637  1.0
  H  H2  1  0.662  0.311  0.733  1.0
  H  H3  1  0.970  0.964  0.972  1.0
  O  O4  1  0.383  0.293  0.622  1.0
  O  O5  1  0.727  0.734  0.440  1.0
  O  O6  1  0.069  0.157  0.190  1.0
  O  O7  1  0.896  0.858  0.818  1.0
[/CIF]
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The crystal structure described by AlOOH crystallizes in the triclinic P1 space group. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. In the second Al site, Al(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing AlO6 octahedra. The corner-sharing octahedral tilt angles are 17°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a linear geometry to one O(3) and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Al(1), two equivalent Al(2), and one H(1) atom. In the second O site, O(2) is bonded to two equivalent Al(1) and two equivalent Al(2) atoms to form corner-sharing OAl4 tetrahedra. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Al(1) and one H(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Al(2) and one H(2) atom. is represented by the CIF card [CIF]
data_AlHO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.963
_cell_length_b   3.738
_cell_length_c   6.804
_cell_angle_alpha   99.747
_cell_angle_beta   101.644
_cell_angle_gamma   89.636
_symmetry_Int_Tables_number   1
_cell_volume   72.705
_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  0.630  0.205  0.327  1.0
  Al  Al1  1  0.300  0.796  0.637  1.0
  H  H2  1  0.662  0.311  0.733  1.0
  H  H3  1  0.970  0.964  0.972  1.0
  O  O4  1  0.383  0.293  0.622  1.0
  O  O5  1  0.727  0.734  0.440  1.0
  O  O6  1  0.069  0.157  0.190  1.0
  O  O7  1  0.896  0.858  0.818  1.0
[/CIF]
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