The structure described by NaErO2 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form NaO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Er(1)O6 octahedra, corners with two equivalent Er(2)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with three equivalent Na(2)O6 octahedra, edges with three equivalent Er(1)O6 octahedra, and edges with four equivalent Er(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-13°. In the second Na site, Na(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NaO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Er(1)O6 octahedra, corners with two equivalent Er(2)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, edges with three equivalent Er(2)O6 octahedra, and edges with four equivalent Er(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form ErO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Er(2)O6 octahedra, edges with two equivalent Er(1)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, edges with three equivalent Er(2)O6 octahedra, and edges with four equivalent Na(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. In the second Er site, Er(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form ErO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Er(1)O6 octahedra, edges with two equivalent Er(2)O6 octahedra, edges with three equivalent Na(2)O6 octahedra, edges with three equivalent Er(1)O6 octahedra, and edges with four equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-13°. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), two equivalent Na(2), one Er(2), and two equivalent Er(1) atoms to form a mixture of corner and edge-sharing ONa3Er3 octahedra. The corner-sharing octahedral tilt angles range from 3-11°. In the second O site, O(2) is bonded to one Na(2), two equivalent Na(1), one Er(1), and two equivalent Er(2) atoms to form a mixture of corner and edge-sharing ONa3Er3 octahedra. The corner-sharing octahedral tilt angles range from 3-11°. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaErO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.838
_cell_length_b   5.951
_cell_length_c   7.294
_cell_angle_alpha   104.829
_cell_angle_beta   104.190
_cell_angle_gamma   112.333
_symmetry_Int_Tables_number   1
_cell_volume   209.299
_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
  Na  Na0  1  0.430  0.180  0.860  1.0
  Na  Na1  1  0.194  0.944  0.389  1.0
  Na  Na2  1  0.570  0.820  0.140  1.0
  Na  Na3  1  0.806  0.056  0.611  1.0
  Er  Er4  1  0.317  0.567  0.635  1.0
  Er  Er5  1  0.683  0.433  0.365  1.0
  Er  Er6  1  0.057  0.307  0.113  1.0
  Er  Er7  1  0.943  0.693  0.887  1.0
  O  O8  1  0.060  0.769  0.627  1.0
  O  O9  1  0.567  0.357  0.627  1.0
  O  O10  1  0.940  0.231  0.373  1.0
  O  O11  1  0.433  0.643  0.373  1.0
  O  O12  1  0.831  0.542  0.124  1.0
  O  O13  1  0.707  0.918  0.876  1.0
  O  O14  1  0.169  0.458  0.876  1.0
  O  O15  1  0.293  0.082  0.124  1.0
[/CIF]
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The structure described by NaErO2 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form NaO6 octahedra that share corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Er(1)O6 octahedra, corners with two equivalent Er(2)O6 octahedra, edges with two equivalent Na(1)O6 octahedra, edges with three equivalent Na(2)O6 octahedra, edges with three equivalent Er(1)O6 octahedra, and edges with four equivalent Er(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-13°. In the second Na site, Na(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NaO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Er(1)O6 octahedra, corners with two equivalent Er(2)O6 octahedra, edges with two equivalent Na(2)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, edges with three equivalent Er(2)O6 octahedra, and edges with four equivalent Er(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form ErO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Er(2)O6 octahedra, edges with two equivalent Er(1)O6 octahedra, edges with three equivalent Na(1)O6 octahedra, edges with three equivalent Er(2)O6 octahedra, and edges with four equivalent Na(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. In the second Er site, Er(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form ErO6 octahedra that share corners with two equivalent Na(1)O6 octahedra, corners with two equivalent Na(2)O6 octahedra, corners with two equivalent Er(1)O6 octahedra, edges with two equivalent Er(2)O6 octahedra, edges with three equivalent Na(2)O6 octahedra, edges with three equivalent Er(1)O6 octahedra, and edges with four equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-13°. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), two equivalent Na(2), one Er(2), and two equivalent Er(1) atoms to form a mixture of corner and edge-sharing ONa3Er3 octahedra. The corner-sharing octahedral tilt angles range from 3-11°. In the second O site, O(2) is bonded to one Na(2), two equivalent Na(1), one Er(1), and two equivalent Er(2) atoms to form a mixture of corner and edge-sharing ONa3Er3 octahedra. The corner-sharing octahedral tilt angles range from 3-11°. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaErO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.838
_cell_length_b   5.951
_cell_length_c   7.294
_cell_angle_alpha   104.829
_cell_angle_beta   104.190
_cell_angle_gamma   112.333
_symmetry_Int_Tables_number   1
_cell_volume   209.299
_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
  Na  Na0  1  0.430  0.180  0.860  1.0
  Na  Na1  1  0.194  0.944  0.389  1.0
  Na  Na2  1  0.570  0.820  0.140  1.0
  Na  Na3  1  0.806  0.056  0.611  1.0
  Er  Er4  1  0.317  0.567  0.635  1.0
  Er  Er5  1  0.683  0.433  0.365  1.0
  Er  Er6  1  0.057  0.307  0.113  1.0
  Er  Er7  1  0.943  0.693  0.887  1.0
  O  O8  1  0.060  0.769  0.627  1.0
  O  O9  1  0.567  0.357  0.627  1.0
  O  O10  1  0.940  0.231  0.373  1.0
  O  O11  1  0.433  0.643  0.373  1.0
  O  O12  1  0.831  0.542  0.124  1.0
  O  O13  1  0.707  0.918  0.876  1.0
  O  O14  1  0.169  0.458  0.876  1.0
  O  O15  1  0.293  0.082  0.124  1.0
[/CIF]
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