The material described by AlEr2 is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 5-coordinate geometry to five equivalent Al(1) atoms. In the second Er site, Er(2) is bonded in a 3-coordinate geometry to five equivalent Al(1) atoms. Al(1) is bonded in a 10-coordinate geometry to five equivalent Er(1) and five equivalent Er(2) atoms. is represented by the CIF file [CIF]
data_Er2Al
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.029
_cell_length_b   6.485
_cell_length_c   9.316
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   303.822
_cell_formula_units_Z   4
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  0.750  0.689  0.572  1.0
  Er  Er1  1  0.750  0.189  0.928  1.0
  Er  Er2  1  0.250  0.311  0.428  1.0
  Er  Er3  1  0.250  0.811  0.072  1.0
  Er  Er4  1  0.750  0.528  0.210  1.0
  Er  Er5  1  0.750  0.028  0.290  1.0
  Er  Er6  1  0.250  0.472  0.790  1.0
  Er  Er7  1  0.250  0.972  0.710  1.0
  Al  Al8  1  0.750  0.210  0.604  1.0
  Al  Al9  1  0.750  0.710  0.896  1.0
  Al  Al10  1  0.250  0.790  0.396  1.0
  Al  Al11  1  0.250  0.290  0.104  1.0
[/CIF]
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The material described by AlEr2 is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 5-coordinate geometry to five equivalent Al(1) atoms. In the second Er site, Er(2) is bonded in a 3-coordinate geometry to five equivalent Al(1) atoms. Al(1) is bonded in a 10-coordinate geometry to five equivalent Er(1) and five equivalent Er(2) atoms. is represented by the CIF file [CIF]
data_Er2Al
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.029
_cell_length_b   6.485
_cell_length_c   9.316
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   303.822
_cell_formula_units_Z   4
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  0.750  0.689  0.572  1.0
  Er  Er1  1  0.750  0.189  0.928  1.0
  Er  Er2  1  0.250  0.311  0.428  1.0
  Er  Er3  1  0.250  0.811  0.072  1.0
  Er  Er4  1  0.750  0.528  0.210  1.0
  Er  Er5  1  0.750  0.028  0.290  1.0
  Er  Er6  1  0.250  0.472  0.790  1.0
  Er  Er7  1  0.250  0.972  0.710  1.0
  Al  Al8  1  0.750  0.210  0.604  1.0
  Al  Al9  1  0.750  0.710  0.896  1.0
  Al  Al10  1  0.250  0.790  0.396  1.0
  Al  Al11  1  0.250  0.290  0.104  1.0
[/CIF]
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