The structure described by ErTaO4 crystallizes in the monoclinic C2/c space group. Er(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. Ta(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Er(1) and two equivalent Ta(1) atoms to form a mixture of distorted edge and corner-sharing OEr2Ta2 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Er(1) and one Ta(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErTaO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.040
_cell_length_b   5.272
_cell_length_c   6.448
_cell_angle_alpha   111.869
_cell_angle_beta   110.667
_cell_angle_gamma   95.336
_symmetry_Int_Tables_number   1
_cell_volume   143.701
_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  0.381  0.631  0.263  1.0
  Er  Er1  1  0.619  0.369  0.737  1.0
  Ta  Ta2  1  0.853  0.103  0.206  1.0
  Ta  Ta3  1  0.147  0.897  0.794  1.0
  O  O4  1  0.003  0.786  0.063  1.0
  O  O5  1  0.560  0.277  0.063  1.0
  O  O6  1  0.997  0.214  0.937  1.0
  O  O7  1  0.440  0.723  0.937  1.0
  O  O8  1  0.211  0.372  0.422  1.0
  O  O9  1  0.712  0.050  0.422  1.0
  O  O10  1  0.789  0.628  0.578  1.0
  O  O11  1  0.288  0.950  0.578  1.0
[/CIF]
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The structure described by ErTaO4 crystallizes in the monoclinic C2/c space group. Er(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. Ta(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Er(1) and two equivalent Ta(1) atoms to form a mixture of distorted edge and corner-sharing OEr2Ta2 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Er(1) and one Ta(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErTaO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.040
_cell_length_b   5.272
_cell_length_c   6.448
_cell_angle_alpha   111.869
_cell_angle_beta   110.667
_cell_angle_gamma   95.336
_symmetry_Int_Tables_number   1
_cell_volume   143.701
_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  0.381  0.631  0.263  1.0
  Er  Er1  1  0.619  0.369  0.737  1.0
  Ta  Ta2  1  0.853  0.103  0.206  1.0
  Ta  Ta3  1  0.147  0.897  0.794  1.0
  O  O4  1  0.003  0.786  0.063  1.0
  O  O5  1  0.560  0.277  0.063  1.0
  O  O6  1  0.997  0.214  0.937  1.0
  O  O7  1  0.440  0.723  0.937  1.0
  O  O8  1  0.211  0.372  0.422  1.0
  O  O9  1  0.712  0.050  0.422  1.0
  O  O10  1  0.789  0.628  0.578  1.0
  O  O11  1  0.288  0.950  0.578  1.0
[/CIF]
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