The structure described by Er(ClO4)3 crystallizes in the hexagonal P6_3/m space group. Er(1) is bonded in a 9-coordinate geometry to three equivalent O(3) and six equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Cl(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Er(1) and one Cl(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Er(1) and one Cl(1) atom. Cl(1) is bonded in a tetrahedral geometry to one O(1), one O(3), and two equivalent O(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er(ClO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.181
_cell_length_b   9.181
_cell_length_c   5.540
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.001
_symmetry_Int_Tables_number   1
_cell_volume   404.397
_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  0.333  0.667  0.750  1.0
  Er  Er1  1  0.667  0.333  0.250  1.0
  Cl  Cl2  1  0.706  0.611  0.750  1.0
  Cl  Cl3  1  0.096  0.706  0.250  1.0
  Cl  Cl4  1  0.611  0.904  0.250  1.0
  Cl  Cl5  1  0.389  0.096  0.750  1.0
  Cl  Cl6  1  0.904  0.294  0.750  1.0
  Cl  Cl7  1  0.294  0.389  0.250  1.0
  O  O8  1  0.807  0.786  0.750  1.0
  O  O9  1  0.021  0.807  0.250  1.0
  O  O10  1  0.786  0.979  0.250  1.0
  O  O11  1  0.214  0.021  0.750  1.0
  O  O12  1  0.979  0.193  0.750  1.0
  O  O13  1  0.193  0.214  0.250  1.0
  O  O14  1  0.796  0.256  0.539  1.0
  O  O15  1  0.541  0.796  0.039  1.0
  O  O16  1  0.472  0.447  0.250  1.0
  O  O17  1  0.025  0.472  0.750  1.0
  O  O18  1  0.447  0.975  0.750  1.0
  O  O19  1  0.553  0.025  0.250  1.0
  O  O20  1  0.975  0.528  0.250  1.0
  O  O21  1  0.528  0.553  0.750  1.0
  O  O22  1  0.796  0.256  0.961  1.0
  O  O23  1  0.541  0.796  0.461  1.0
  O  O24  1  0.256  0.459  0.461  1.0
  O  O25  1  0.744  0.541  0.961  1.0
  O  O26  1  0.459  0.204  0.961  1.0
  O  O27  1  0.204  0.744  0.461  1.0
  O  O28  1  0.204  0.744  0.039  1.0
  O  O29  1  0.459  0.204  0.539  1.0
  O  O30  1  0.744  0.541  0.539  1.0
  O  O31  1  0.256  0.459  0.039  1.0
[/CIF]
.
The structure described by Er(ClO4)3 crystallizes in the hexagonal P6_3/m space group. Er(1) is bonded in a 9-coordinate geometry to three equivalent O(3) and six equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Cl(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Er(1) and one Cl(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Er(1) and one Cl(1) atom. Cl(1) is bonded in a tetrahedral geometry to one O(1), one O(3), and two equivalent O(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er(ClO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.181
_cell_length_b   9.181
_cell_length_c   5.540
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.001
_symmetry_Int_Tables_number   1
_cell_volume   404.397
_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  0.333  0.667  0.750  1.0
  Er  Er1  1  0.667  0.333  0.250  1.0
  Cl  Cl2  1  0.706  0.611  0.750  1.0
  Cl  Cl3  1  0.096  0.706  0.250  1.0
  Cl  Cl4  1  0.611  0.904  0.250  1.0
  Cl  Cl5  1  0.389  0.096  0.750  1.0
  Cl  Cl6  1  0.904  0.294  0.750  1.0
  Cl  Cl7  1  0.294  0.389  0.250  1.0
  O  O8  1  0.807  0.786  0.750  1.0
  O  O9  1  0.021  0.807  0.250  1.0
  O  O10  1  0.786  0.979  0.250  1.0
  O  O11  1  0.214  0.021  0.750  1.0
  O  O12  1  0.979  0.193  0.750  1.0
  O  O13  1  0.193  0.214  0.250  1.0
  O  O14  1  0.796  0.256  0.539  1.0
  O  O15  1  0.541  0.796  0.039  1.0
  O  O16  1  0.472  0.447  0.250  1.0
  O  O17  1  0.025  0.472  0.750  1.0
  O  O18  1  0.447  0.975  0.750  1.0
  O  O19  1  0.553  0.025  0.250  1.0
  O  O20  1  0.975  0.528  0.250  1.0
  O  O21  1  0.528  0.553  0.750  1.0
  O  O22  1  0.796  0.256  0.961  1.0
  O  O23  1  0.541  0.796  0.461  1.0
  O  O24  1  0.256  0.459  0.461  1.0
  O  O25  1  0.744  0.541  0.961  1.0
  O  O26  1  0.459  0.204  0.961  1.0
  O  O27  1  0.204  0.744  0.461  1.0
  O  O28  1  0.204  0.744  0.039  1.0
  O  O29  1  0.459  0.204  0.539  1.0
  O  O30  1  0.744  0.541  0.539  1.0
  O  O31  1  0.256  0.459  0.039  1.0
[/CIF]
.