The material structure described by Na7Cu7O13 crystallizes in the triclinic P1 space group. There are seven inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(12), one O(3), one O(6), one O(7), and one O(9) atom to form NaO6 octahedra that share  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. In the second Na site, Na(2) is bonded to one O(11), one O(12), one O(13), one O(7), and one O(8) atom to form distorted NaO5 square pyramids that share  a cornercorner with one Na(5)O5 trigonal bipyramid,  a cornercorner with one Na(6)O5 trigonal bipyramid,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, and  an edgeedge with one Na(7)O6 octahedra. In the third Na site, Na(3) is bonded to one O(11), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. In the fourth Na site, Na(4) is bonded to one O(10), one O(11), one O(2), one O(5), one O(6), and one O(7) atom to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. In the fifth Na site, Na(5) is bonded to one O(10), one O(13), one O(4), one O(6), and one O(9) atom to form distorted NaO5 trigonal bipyramids that share  a cornercorner with one Na(2)O5 square pyramid,  a cornercorner with one Na(6)O5 trigonal bipyramid,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, and  an edgeedge with one Na(7)O6 octahedra. In the sixth Na site, Na(6) is bonded to one O(1), one O(12), one O(2), one O(4), and one O(5) atom to form distorted NaO5 trigonal bipyramids that share  a cornercorner with one Na(2)O5 square pyramid,  a cornercorner with one Na(5)O5 trigonal bipyramid,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, and  an edgeedge with one Na(7)O6 octahedra. In the seventh Na site, Na(7) is bonded to one O(1), one O(10), one O(13), one O(3), one O(5), and one O(8) atom to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. There are seven inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a T-shaped geometry to one O(10), one O(11), and one O(6) atom. In the second Cu site, Cu(2) is bonded in a T-shaped geometry to one O(1), one O(4), and one O(6) atom. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to one O(1), one O(4), one O(5), and one O(8) atom. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to one O(13), one O(5), one O(7), and one O(8) atom. In the fifth Cu site, Cu(5) is bonded in a square co-planar geometry to one O(12), one O(13), one O(7), and one O(9) atom. In the sixth Cu site, Cu(6) is bonded in a square co-planar geometry to one O(12), one O(2), one O(3), and one O(9) atom. In the seventh Cu site, Cu(7) is bonded in a square co-planar geometry to one O(10), one O(11), one O(2), and one O(3) atom. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(6), one Na(7), one Cu(2), and one Cu(3) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the second O site, O(2) is bonded to one Na(3), one Na(4), one Na(6), one Cu(6), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the third O site, O(3) is bonded to one Na(1), one Na(3), one Na(7), one Cu(6), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the fourth O site, O(4) is bonded to one Na(3), one Na(5), one Na(6), one Cu(2), and one Cu(3) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the fifth O site, O(5) is bonded to one Na(4), one Na(6), one Na(7), one Cu(3), and one Cu(4) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the sixth O site, O(6) is bonded to one Na(1), one Na(4), one Na(5), one Cu(1), and one Cu(2) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the seventh O site, O(7) is bonded to one Na(1), one Na(2), one Na(4), one Cu(4), and one Cu(5) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the eighth O site, O(8) is bonded to one Na(2), one Na(3), one Na(7), one Cu(3), and one Cu(4) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the ninth O site, O(9) is bonded to one Na(1), one Na(3), one Na(5), one Cu(5), and one Cu(6) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the tenth O site, O(10) is bonded to one Na(4), one Na(5), one Na(7), one Cu(1), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the eleventh O site, O(11) is bonded to one Na(2), one Na(3), one Na(4), one Cu(1), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the twelfth O site, O(12) is bonded to one Na(1), one Na(2), one Na(6), one Cu(5), and one Cu(6) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the thirteenth O site, O(13) is bonded to one Na(2), one Na(5), one Na(7), one Cu(4), and one Cu(5) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. is represented by the CIF file [CIF]
data_Na7Cu7O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.760
_cell_length_b   6.806
_cell_length_c   7.690
_cell_angle_alpha   99.256
_cell_angle_beta   99.719
_cell_angle_gamma   101.251
_symmetry_Int_Tables_number   1
_cell_volume   335.108
_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  0.714  0.215  0.573  1.0
  Na  Na1  1  0.852  0.336  0.275  1.0
  Na  Na2  1  0.568  0.072  0.854  1.0
  Na  Na3  1  0.429  0.929  0.140  1.0
  Na  Na4  1  0.301  0.790  0.426  1.0
  Na  Na5  1  0.146  0.639  0.726  1.0
  Na  Na6  1  0.999  0.501  0.001  1.0
  Cu  Cu7  1  0.853  0.857  0.285  1.0
  Cu  Cu8  1  0.711  0.717  0.570  1.0
  Cu  Cu9  1  0.574  0.574  0.857  1.0
  Cu  Cu10  1  0.430  0.431  0.145  1.0
  Cu  Cu11  1  0.285  0.288  0.429  1.0
  Cu  Cu12  1  0.141  0.143  0.713  1.0
  Cu  Cu13  1  0.999  0.996  0.000  1.0
  O  O14  1  0.795  0.565  0.740  1.0
  O  O15  1  0.216  0.990  0.881  1.0
  O  O16  1  0.924  0.150  0.830  1.0
  O  O17  1  0.484  0.721  0.691  1.0
  O  O18  1  0.355  0.578  0.974  1.0
  O  O19  1  0.645  0.861  0.401  1.0
  O  O20  1  0.506  0.281  0.316  1.0
  O  O21  1  0.650  0.424  0.030  1.0
  O  O22  1  0.358  0.132  0.596  1.0
  O  O23  1  0.079  0.848  0.175  1.0
  O  O24  1  0.777  0.009  0.105  1.0
  O  O25  1  0.065  0.299  0.544  1.0
  O  O26  1  0.209  0.442  0.262  1.0
[/CIF]
.
The material structure described by Na7Cu7O13 crystallizes in the triclinic P1 space group. There are seven inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(12), one O(3), one O(6), one O(7), and one O(9) atom to form NaO6 octahedra that share  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. In the second Na site, Na(2) is bonded to one O(11), one O(12), one O(13), one O(7), and one O(8) atom to form distorted NaO5 square pyramids that share  a cornercorner with one Na(5)O5 trigonal bipyramid,  a cornercorner with one Na(6)O5 trigonal bipyramid,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, and  an edgeedge with one Na(7)O6 octahedra. In the third Na site, Na(3) is bonded to one O(11), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. In the fourth Na site, Na(4) is bonded to one O(10), one O(11), one O(2), one O(5), one O(6), and one O(7) atom to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(7)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. In the fifth Na site, Na(5) is bonded to one O(10), one O(13), one O(4), one O(6), and one O(9) atom to form distorted NaO5 trigonal bipyramids that share  a cornercorner with one Na(2)O5 square pyramid,  a cornercorner with one Na(6)O5 trigonal bipyramid,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, and  an edgeedge with one Na(7)O6 octahedra. In the sixth Na site, Na(6) is bonded to one O(1), one O(12), one O(2), one O(4), and one O(5) atom to form distorted NaO5 trigonal bipyramids that share  a cornercorner with one Na(2)O5 square pyramid,  a cornercorner with one Na(5)O5 trigonal bipyramid,  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra, and  an edgeedge with one Na(7)O6 octahedra. In the seventh Na site, Na(7) is bonded to one O(1), one O(10), one O(13), one O(3), one O(5), and one O(8) atom to form NaO6 octahedra that share  an edgeedge with one Na(1)O6 octahedra,  an edgeedge with one Na(3)O6 octahedra,  an edgeedge with one Na(4)O6 octahedra,  an edgeedge with one Na(2)O5 square pyramid,  an edgeedge with one Na(5)O5 trigonal bipyramid, and  an edgeedge with one Na(6)O5 trigonal bipyramid. There are seven inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a T-shaped geometry to one O(10), one O(11), and one O(6) atom. In the second Cu site, Cu(2) is bonded in a T-shaped geometry to one O(1), one O(4), and one O(6) atom. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to one O(1), one O(4), one O(5), and one O(8) atom. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to one O(13), one O(5), one O(7), and one O(8) atom. In the fifth Cu site, Cu(5) is bonded in a square co-planar geometry to one O(12), one O(13), one O(7), and one O(9) atom. In the sixth Cu site, Cu(6) is bonded in a square co-planar geometry to one O(12), one O(2), one O(3), and one O(9) atom. In the seventh Cu site, Cu(7) is bonded in a square co-planar geometry to one O(10), one O(11), one O(2), and one O(3) atom. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(6), one Na(7), one Cu(2), and one Cu(3) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the second O site, O(2) is bonded to one Na(3), one Na(4), one Na(6), one Cu(6), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the third O site, O(3) is bonded to one Na(1), one Na(3), one Na(7), one Cu(6), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the fourth O site, O(4) is bonded to one Na(3), one Na(5), one Na(6), one Cu(2), and one Cu(3) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the fifth O site, O(5) is bonded to one Na(4), one Na(6), one Na(7), one Cu(3), and one Cu(4) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the sixth O site, O(6) is bonded to one Na(1), one Na(4), one Na(5), one Cu(1), and one Cu(2) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the seventh O site, O(7) is bonded to one Na(1), one Na(2), one Na(4), one Cu(4), and one Cu(5) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the eighth O site, O(8) is bonded to one Na(2), one Na(3), one Na(7), one Cu(3), and one Cu(4) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the ninth O site, O(9) is bonded to one Na(1), one Na(3), one Na(5), one Cu(5), and one Cu(6) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the tenth O site, O(10) is bonded to one Na(4), one Na(5), one Na(7), one Cu(1), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the eleventh O site, O(11) is bonded to one Na(2), one Na(3), one Na(4), one Cu(1), and one Cu(7) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the twelfth O site, O(12) is bonded to one Na(1), one Na(2), one Na(6), one Cu(5), and one Cu(6) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. In the thirteenth O site, O(13) is bonded to one Na(2), one Na(5), one Na(7), one Cu(4), and one Cu(5) atom to form a mixture of distorted edge and corner-sharing ONa3Cu2 square pyramids. is represented by the CIF file [CIF]
data_Na7Cu7O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.760
_cell_length_b   6.806
_cell_length_c   7.690
_cell_angle_alpha   99.256
_cell_angle_beta   99.719
_cell_angle_gamma   101.251
_symmetry_Int_Tables_number   1
_cell_volume   335.108
_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  0.714  0.215  0.573  1.0
  Na  Na1  1  0.852  0.336  0.275  1.0
  Na  Na2  1  0.568  0.072  0.854  1.0
  Na  Na3  1  0.429  0.929  0.140  1.0
  Na  Na4  1  0.301  0.790  0.426  1.0
  Na  Na5  1  0.146  0.639  0.726  1.0
  Na  Na6  1  0.999  0.501  0.001  1.0
  Cu  Cu7  1  0.853  0.857  0.285  1.0
  Cu  Cu8  1  0.711  0.717  0.570  1.0
  Cu  Cu9  1  0.574  0.574  0.857  1.0
  Cu  Cu10  1  0.430  0.431  0.145  1.0
  Cu  Cu11  1  0.285  0.288  0.429  1.0
  Cu  Cu12  1  0.141  0.143  0.713  1.0
  Cu  Cu13  1  0.999  0.996  0.000  1.0
  O  O14  1  0.795  0.565  0.740  1.0
  O  O15  1  0.216  0.990  0.881  1.0
  O  O16  1  0.924  0.150  0.830  1.0
  O  O17  1  0.484  0.721  0.691  1.0
  O  O18  1  0.355  0.578  0.974  1.0
  O  O19  1  0.645  0.861  0.401  1.0
  O  O20  1  0.506  0.281  0.316  1.0
  O  O21  1  0.650  0.424  0.030  1.0
  O  O22  1  0.358  0.132  0.596  1.0
  O  O23  1  0.079  0.848  0.175  1.0
  O  O24  1  0.777  0.009  0.105  1.0
  O  O25  1  0.065  0.299  0.544  1.0
  O  O26  1  0.209  0.442  0.262  1.0
[/CIF]
.