The compound described by Na2Cu2TeO6 crystallizes in the monoclinic C2/m space group. Na(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form distorted NaO6 octahedra that share corners with two equivalent Te(1)O6 octahedra, edges with two equivalent Te(1)O6 octahedra, and edges with three equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles are 15°. Cu(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. Te(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form TeO6 octahedra that share corners with four equivalent Na(1)O6 octahedra and edges with four equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles are 15°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1), two equivalent Cu(1), and one Te(1) atom to form a mixture of distorted corner and edge-sharing ONa2Cu2Te trigonal bipyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Cu(1), and one Te(1) atom. is represented by the CIF card [CIF]
data_Na2Cu2TeO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.272
_cell_length_b   5.272
_cell_length_c   6.041
_cell_angle_alpha   103.553
_cell_angle_beta   103.553
_cell_angle_gamma   112.432
_symmetry_Int_Tables_number   1
_cell_volume   140.758
_cell_formula_units_Z   1
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  0.816  0.184  0.500  1.0
  Na  Na1  1  0.184  0.816  0.500  1.0
  Cu  Cu2  1  0.335  0.665  1.000  1.0
  Cu  Cu3  1  0.665  0.335  0.000  1.0
  Te  Te4  1  0.000  1.000  0.000  1.0
  O  O5  1  0.757  0.757  0.159  1.0
  O  O6  1  0.025  0.353  0.216  1.0
  O  O7  1  0.243  0.243  0.841  1.0
  O  O8  1  0.353  0.025  0.216  1.0
  O  O9  1  0.975  0.647  0.784  1.0
  O  O10  1  0.647  0.975  0.784  1.0
[/CIF]
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The compound described by Na2Cu2TeO6 crystallizes in the monoclinic C2/m space group. Na(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form distorted NaO6 octahedra that share corners with two equivalent Te(1)O6 octahedra, edges with two equivalent Te(1)O6 octahedra, and edges with three equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles are 15°. Cu(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. Te(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form TeO6 octahedra that share corners with four equivalent Na(1)O6 octahedra and edges with four equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles are 15°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1), two equivalent Cu(1), and one Te(1) atom to form a mixture of distorted corner and edge-sharing ONa2Cu2Te trigonal bipyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Cu(1), and one Te(1) atom. is represented by the CIF card [CIF]
data_Na2Cu2TeO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.272
_cell_length_b   5.272
_cell_length_c   6.041
_cell_angle_alpha   103.553
_cell_angle_beta   103.553
_cell_angle_gamma   112.432
_symmetry_Int_Tables_number   1
_cell_volume   140.758
_cell_formula_units_Z   1
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  0.816  0.184  0.500  1.0
  Na  Na1  1  0.184  0.816  0.500  1.0
  Cu  Cu2  1  0.335  0.665  1.000  1.0
  Cu  Cu3  1  0.665  0.335  0.000  1.0
  Te  Te4  1  0.000  1.000  0.000  1.0
  O  O5  1  0.757  0.757  0.159  1.0
  O  O6  1  0.025  0.353  0.216  1.0
  O  O7  1  0.243  0.243  0.841  1.0
  O  O8  1  0.353  0.025  0.216  1.0
  O  O9  1  0.975  0.647  0.784  1.0
  O  O10  1  0.647  0.975  0.784  1.0
[/CIF]
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