The structure described by Na4CuTe2O29 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(3), one O(5), one O(7), one O(8), and three equivalent O(9) atoms to form distorted NaO8 hexagonal bipyramids that share corners with two equivalent Na(1)O8 hexagonal bipyramids,  a cornercorner with one Te(1)O5 square pyramid, corners with three equivalent O(1)NaCuTeO tetrahedra, edges with two equivalent Na(1)O8 hexagonal bipyramids, and  an edgeedge with one Te(1)O5 square pyramid. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(13), one O(7), one O(8), and two equivalent O(12) atoms. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Te(1) is bonded to one O(1), one O(2), one O(3), one O(5), and one O(6) atom to form distorted TeO5 square pyramids that share  a cornercorner with one Na(1)O8 hexagonal bipyramid and  an edgeedge with one Na(1)O8 hexagonal bipyramid. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Cu(1), one Te(1), and one O(9) atom to form distorted ONaCuTeO tetrahedra that share corners with three equivalent Na(1)O8 hexagonal bipyramids and  a cornercorner with one O(1)NaCuTeO tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one Te(1), and one O(8) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Te(1), and one O(7) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one O(11) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one Te(1), and one O(6) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Te(1) and one O(5) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Na(2), and one O(3) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Na(1), one Na(2), and one O(2) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Na(1) and one O(1) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Na(2) and one O(15) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Na(2), one O(14), and one O(4) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to two equivalent Na(2) and one O(13) atom. In the thirteenth O site, O(13) is bonded in a distorted L-shaped geometry to one Na(2) and one O(12) atom. In the fourteenth O site, O(14) is bonded in a linear geometry to two equivalent O(11) atoms. In the fifteenth O site, O(15) is bonded in a single-bond geometry to one O(10) atom. is represented by the CIF card [CIF]
data_Na4CuTe2O29
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.901
_cell_length_b   8.960
_cell_length_c   13.318
_cell_angle_alpha   92.127
_cell_angle_beta   94.361
_cell_angle_gamma   105.721
_symmetry_Int_Tables_number   1
_cell_volume   560.303
_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  0.650  0.352  0.956  1.0
  Na  Na1  1  0.350  0.648  0.044  1.0
  Na  Na2  1  0.377  0.215  0.681  1.0
  Na  Na3  1  0.623  0.785  0.319  1.0
  Cu  Cu4  1  0.000  0.000  0.000  1.0
  Te  Te5  1  0.008  0.238  0.198  1.0
  Te  Te6  1  0.992  0.762  0.802  1.0
  O  O7  1  0.014  0.223  0.033  1.0
  O  O8  1  0.986  0.777  0.967  1.0
  O  O9  1  0.895  0.974  0.135  1.0
  O  O10  1  0.105  0.026  0.865  1.0
  O  O11  1  0.146  0.488  0.194  1.0
  O  O12  1  0.854  0.512  0.806  1.0
  O  O13  1  0.929  0.163  0.415  1.0
  O  O14  1  0.071  0.837  0.585  1.0
  O  O15  1  0.617  0.256  0.132  1.0
  O  O16  1  0.383  0.744  0.868  1.0
  O  O17  1  0.422  0.227  0.213  1.0
  O  O18  1  0.578  0.773  0.787  1.0
  O  O19  1  0.576  0.451  0.778  1.0
  O  O20  1  0.424  0.549  0.222  1.0
  O  O21  1  0.368  0.119  0.852  1.0
  O  O22  1  0.632  0.881  0.148  1.0
  O  O23  1  0.824  0.651  0.015  1.0
  O  O24  1  0.176  0.349  0.985  1.0
  O  O25  1  0.475  0.321  0.476  1.0
  O  O26  1  0.525  0.679  0.524  1.0
  O  O27  1  0.211  0.976  0.577  1.0
  O  O28  1  0.789  0.024  0.423  1.0
  O  O29  1  0.835  0.172  0.661  1.0
  O  O30  1  0.165  0.828  0.339  1.0
  O  O31  1  0.956  0.307  0.634  1.0
  O  O32  1  0.044  0.693  0.366  1.0
  O  O33  1  0.500  0.000  0.500  1.0
  O  O34  1  0.363  0.595  0.578  1.0
  O  O35  1  0.637  0.405  0.422  1.0
[/CIF]
.
The structure described by Na4CuTe2O29 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(3), one O(5), one O(7), one O(8), and three equivalent O(9) atoms to form distorted NaO8 hexagonal bipyramids that share corners with two equivalent Na(1)O8 hexagonal bipyramids,  a cornercorner with one Te(1)O5 square pyramid, corners with three equivalent O(1)NaCuTeO tetrahedra, edges with two equivalent Na(1)O8 hexagonal bipyramids, and  an edgeedge with one Te(1)O5 square pyramid. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(13), one O(7), one O(8), and two equivalent O(12) atoms. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Te(1) is bonded to one O(1), one O(2), one O(3), one O(5), and one O(6) atom to form distorted TeO5 square pyramids that share  a cornercorner with one Na(1)O8 hexagonal bipyramid and  an edgeedge with one Na(1)O8 hexagonal bipyramid. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Cu(1), one Te(1), and one O(9) atom to form distorted ONaCuTeO tetrahedra that share corners with three equivalent Na(1)O8 hexagonal bipyramids and  a cornercorner with one O(1)NaCuTeO tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one Te(1), and one O(8) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Te(1), and one O(7) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one O(11) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one Te(1), and one O(6) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Te(1) and one O(5) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Na(2), and one O(3) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Na(1), one Na(2), and one O(2) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Na(1) and one O(1) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Na(2) and one O(15) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Na(2), one O(14), and one O(4) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to two equivalent Na(2) and one O(13) atom. In the thirteenth O site, O(13) is bonded in a distorted L-shaped geometry to one Na(2) and one O(12) atom. In the fourteenth O site, O(14) is bonded in a linear geometry to two equivalent O(11) atoms. In the fifteenth O site, O(15) is bonded in a single-bond geometry to one O(10) atom. is represented by the CIF card [CIF]
data_Na4CuTe2O29
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.901
_cell_length_b   8.960
_cell_length_c   13.318
_cell_angle_alpha   92.127
_cell_angle_beta   94.361
_cell_angle_gamma   105.721
_symmetry_Int_Tables_number   1
_cell_volume   560.303
_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  0.650  0.352  0.956  1.0
  Na  Na1  1  0.350  0.648  0.044  1.0
  Na  Na2  1  0.377  0.215  0.681  1.0
  Na  Na3  1  0.623  0.785  0.319  1.0
  Cu  Cu4  1  0.000  0.000  0.000  1.0
  Te  Te5  1  0.008  0.238  0.198  1.0
  Te  Te6  1  0.992  0.762  0.802  1.0
  O  O7  1  0.014  0.223  0.033  1.0
  O  O8  1  0.986  0.777  0.967  1.0
  O  O9  1  0.895  0.974  0.135  1.0
  O  O10  1  0.105  0.026  0.865  1.0
  O  O11  1  0.146  0.488  0.194  1.0
  O  O12  1  0.854  0.512  0.806  1.0
  O  O13  1  0.929  0.163  0.415  1.0
  O  O14  1  0.071  0.837  0.585  1.0
  O  O15  1  0.617  0.256  0.132  1.0
  O  O16  1  0.383  0.744  0.868  1.0
  O  O17  1  0.422  0.227  0.213  1.0
  O  O18  1  0.578  0.773  0.787  1.0
  O  O19  1  0.576  0.451  0.778  1.0
  O  O20  1  0.424  0.549  0.222  1.0
  O  O21  1  0.368  0.119  0.852  1.0
  O  O22  1  0.632  0.881  0.148  1.0
  O  O23  1  0.824  0.651  0.015  1.0
  O  O24  1  0.176  0.349  0.985  1.0
  O  O25  1  0.475  0.321  0.476  1.0
  O  O26  1  0.525  0.679  0.524  1.0
  O  O27  1  0.211  0.976  0.577  1.0
  O  O28  1  0.789  0.024  0.423  1.0
  O  O29  1  0.835  0.172  0.661  1.0
  O  O30  1  0.165  0.828  0.339  1.0
  O  O31  1  0.956  0.307  0.634  1.0
  O  O32  1  0.044  0.693  0.366  1.0
  O  O33  1  0.500  0.000  0.500  1.0
  O  O34  1  0.363  0.595  0.578  1.0
  O  O35  1  0.637  0.405  0.422  1.0
[/CIF]
.