The structure described by Na4SnTe4 crystallizes in the orthorhombic P2_12_12_1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Te(1) and two equivalent Te(2) atoms. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one Te(2), two equivalent Te(1), and two equivalent Te(4) atoms. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one Te(1), one Te(4), two equivalent Te(2), and two equivalent Te(3) atoms. In the fourth Na site, Na(4) is bonded to one Te(1), two equivalent Te(3), and two equivalent Te(4) atoms to form distorted NaTe5 trigonal bipyramids that share corners with three equivalent Sn(1)Te4 tetrahedra, corners with four equivalent Na(4)Te5 trigonal bipyramids, and  an edgeedge with one Sn(1)Te4 tetrahedra. Sn(1) is bonded to one Te(1), one Te(2), one Te(3), and one Te(4) atom to form SnTe4 tetrahedra that share corners with three equivalent Na(4)Te5 trigonal bipyramids and  an edgeedge with one Na(4)Te5 trigonal bipyramid. There are four inequivalent Te sites. In the first Te site, Te(4) is bonded to one Na(3), two equivalent Na(2), two equivalent Na(4), and one Sn(1) atom to form distorted edge-sharing TeNa5Sn pentagonal pyramids. In the second Te site, Te(1) is bonded in a 7-coordinate geometry to one Na(3), one Na(4), two equivalent Na(1), two equivalent Na(2), and one Sn(1) atom. In the third Te site, Te(2) is bonded in a 6-coordinate geometry to one Na(2), two equivalent Na(1), two equivalent Na(3), and one Sn(1) atom. In the fourth Te site, Te(3) is bonded in a 5-coordinate geometry to two equivalent Na(3), two equivalent Na(4), and one Sn(1) atom. is represented by the CIF file [CIF]
data_Na4SnTe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.655
_cell_length_b   8.819
_cell_length_c   15.338
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1170.701
_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  0.987  0.955  0.588  1.0
  Na  Na1  1  0.487  0.545  0.412  1.0
  Na  Na2  1  0.013  0.455  0.912  1.0
  Na  Na3  1  0.513  0.045  0.088  1.0
  Na  Na4  1  0.626  0.763  0.634  1.0
  Na  Na5  1  0.126  0.737  0.366  1.0
  Na  Na6  1  0.374  0.263  0.866  1.0
  Na  Na7  1  0.874  0.237  0.134  1.0
  Na  Na8  1  0.668  0.629  0.132  1.0
  Na  Na9  1  0.168  0.871  0.868  1.0
  Na  Na10  1  0.332  0.129  0.368  1.0
  Na  Na11  1  0.832  0.371  0.632  1.0
  Na  Na12  1  0.882  0.360  0.372  1.0
  Na  Na13  1  0.382  0.140  0.628  1.0
  Na  Na14  1  0.118  0.860  0.128  1.0
  Na  Na15  1  0.618  0.640  0.872  1.0
  Sn  Sn16  1  0.778  0.066  0.874  1.0
  Sn  Sn17  1  0.278  0.434  0.126  1.0
  Sn  Sn18  1  0.222  0.566  0.626  1.0
  Sn  Sn19  1  0.722  0.934  0.374  1.0
  Te  Te20  1  0.814  0.684  0.469  1.0
  Te  Te21  1  0.314  0.816  0.531  1.0
  Te  Te22  1  0.186  0.184  0.031  1.0
  Te  Te23  1  0.686  0.316  0.969  1.0
  Te  Te24  1  0.486  0.846  0.263  1.0
  Te  Te25  1  0.986  0.654  0.737  1.0
  Te  Te26  1  0.514  0.346  0.237  1.0
  Te  Te27  1  0.014  0.154  0.763  1.0
  Te  Te28  1  0.646  0.165  0.488  1.0
  Te  Te29  1  0.146  0.335  0.512  1.0
  Te  Te30  1  0.354  0.665  0.012  1.0
  Te  Te31  1  0.854  0.835  0.988  1.0
  Te  Te32  1  0.984  0.042  0.290  1.0
  Te  Te33  1  0.484  0.458  0.710  1.0
  Te  Te34  1  0.016  0.542  0.210  1.0
  Te  Te35  1  0.516  0.958  0.790  1.0
[/CIF]
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The structure described by Na4SnTe4 crystallizes in the orthorhombic P2_12_12_1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Te(1) and two equivalent Te(2) atoms. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one Te(2), two equivalent Te(1), and two equivalent Te(4) atoms. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one Te(1), one Te(4), two equivalent Te(2), and two equivalent Te(3) atoms. In the fourth Na site, Na(4) is bonded to one Te(1), two equivalent Te(3), and two equivalent Te(4) atoms to form distorted NaTe5 trigonal bipyramids that share corners with three equivalent Sn(1)Te4 tetrahedra, corners with four equivalent Na(4)Te5 trigonal bipyramids, and  an edgeedge with one Sn(1)Te4 tetrahedra. Sn(1) is bonded to one Te(1), one Te(2), one Te(3), and one Te(4) atom to form SnTe4 tetrahedra that share corners with three equivalent Na(4)Te5 trigonal bipyramids and  an edgeedge with one Na(4)Te5 trigonal bipyramid. There are four inequivalent Te sites. In the first Te site, Te(4) is bonded to one Na(3), two equivalent Na(2), two equivalent Na(4), and one Sn(1) atom to form distorted edge-sharing TeNa5Sn pentagonal pyramids. In the second Te site, Te(1) is bonded in a 7-coordinate geometry to one Na(3), one Na(4), two equivalent Na(1), two equivalent Na(2), and one Sn(1) atom. In the third Te site, Te(2) is bonded in a 6-coordinate geometry to one Na(2), two equivalent Na(1), two equivalent Na(3), and one Sn(1) atom. In the fourth Te site, Te(3) is bonded in a 5-coordinate geometry to two equivalent Na(3), two equivalent Na(4), and one Sn(1) atom. is represented by the CIF file [CIF]
data_Na4SnTe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.655
_cell_length_b   8.819
_cell_length_c   15.338
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1170.701
_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  0.987  0.955  0.588  1.0
  Na  Na1  1  0.487  0.545  0.412  1.0
  Na  Na2  1  0.013  0.455  0.912  1.0
  Na  Na3  1  0.513  0.045  0.088  1.0
  Na  Na4  1  0.626  0.763  0.634  1.0
  Na  Na5  1  0.126  0.737  0.366  1.0
  Na  Na6  1  0.374  0.263  0.866  1.0
  Na  Na7  1  0.874  0.237  0.134  1.0
  Na  Na8  1  0.668  0.629  0.132  1.0
  Na  Na9  1  0.168  0.871  0.868  1.0
  Na  Na10  1  0.332  0.129  0.368  1.0
  Na  Na11  1  0.832  0.371  0.632  1.0
  Na  Na12  1  0.882  0.360  0.372  1.0
  Na  Na13  1  0.382  0.140  0.628  1.0
  Na  Na14  1  0.118  0.860  0.128  1.0
  Na  Na15  1  0.618  0.640  0.872  1.0
  Sn  Sn16  1  0.778  0.066  0.874  1.0
  Sn  Sn17  1  0.278  0.434  0.126  1.0
  Sn  Sn18  1  0.222  0.566  0.626  1.0
  Sn  Sn19  1  0.722  0.934  0.374  1.0
  Te  Te20  1  0.814  0.684  0.469  1.0
  Te  Te21  1  0.314  0.816  0.531  1.0
  Te  Te22  1  0.186  0.184  0.031  1.0
  Te  Te23  1  0.686  0.316  0.969  1.0
  Te  Te24  1  0.486  0.846  0.263  1.0
  Te  Te25  1  0.986  0.654  0.737  1.0
  Te  Te26  1  0.514  0.346  0.237  1.0
  Te  Te27  1  0.014  0.154  0.763  1.0
  Te  Te28  1  0.646  0.165  0.488  1.0
  Te  Te29  1  0.146  0.335  0.512  1.0
  Te  Te30  1  0.354  0.665  0.012  1.0
  Te  Te31  1  0.854  0.835  0.988  1.0
  Te  Te32  1  0.984  0.042  0.290  1.0
  Te  Te33  1  0.484  0.458  0.710  1.0
  Te  Te34  1  0.016  0.542  0.210  1.0
  Te  Te35  1  0.516  0.958  0.790  1.0
[/CIF]
.