The structure described by ErOOH crystallizes in the monoclinic P2_1/m space group. Er(1) is bonded in a 7-coordinate geometry to three equivalent O(2) and four equivalent O(1) atoms. H(1) is bonded in a single-bond geometry to one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Er(1) atoms to form a mixture of corner and edge-sharing OEr4 tetrahedra. In the second O site, O(2) is bonded in a single-bond geometry to three equivalent Er(1) and one H(1) atom. is represented by the CIF file [CIF]
data_ErHO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.577
_cell_length_b   4.258
_cell_length_c   6.012
_cell_angle_alpha   112.658
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   84.489
_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
  Er  Er0  1  0.250  0.356  0.189  1.0
  Er  Er1  1  0.750  0.644  0.811  1.0
  H  H2  1  0.250  0.097  0.583  1.0
  H  H3  1  0.750  0.903  0.417  1.0
  O  O4  1  0.250  0.785  0.052  1.0
  O  O5  1  0.750  0.215  0.948  1.0
  O  O6  1  0.250  0.312  0.562  1.0
  O  O7  1  0.750  0.688  0.438  1.0
[/CIF]
.
The structure described by ErOOH crystallizes in the monoclinic P2_1/m space group. Er(1) is bonded in a 7-coordinate geometry to three equivalent O(2) and four equivalent O(1) atoms. H(1) is bonded in a single-bond geometry to one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Er(1) atoms to form a mixture of corner and edge-sharing OEr4 tetrahedra. In the second O site, O(2) is bonded in a single-bond geometry to three equivalent Er(1) and one H(1) atom. is represented by the CIF file [CIF]
data_ErHO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.577
_cell_length_b   4.258
_cell_length_c   6.012
_cell_angle_alpha   112.658
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   84.489
_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
  Er  Er0  1  0.250  0.356  0.189  1.0
  Er  Er1  1  0.750  0.644  0.811  1.0
  H  H2  1  0.250  0.097  0.583  1.0
  H  H3  1  0.750  0.903  0.417  1.0
  O  O4  1  0.250  0.785  0.052  1.0
  O  O5  1  0.750  0.215  0.948  1.0
  O  O6  1  0.250  0.312  0.562  1.0
  O  O7  1  0.750  0.688  0.438  1.0
[/CIF]
.