The material structure described by Fe(Sn2Se5)2(N(CH3)4)2 crystallizes in the tetragonal I-4 space group. The structure consists of four tetramethylammonium molecules inside a Fe(Sn2Se5)2 framework. In the Fe(Sn2Se5)2 framework, Fe(1) is bonded to four equivalent Se(3) atoms to form FeSe4 tetrahedra that share corners with four equivalent Sn(1)Se4 tetrahedra. Sn(1) is bonded to one Se(2), one Se(3), and two equivalent Se(1) atoms to form SnSe4 tetrahedra that share  a cornercorner with one Fe(1)Se4 tetrahedra and corners with three equivalent Sn(1)Se4 tetrahedra. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a water-like geometry to two equivalent Sn(1) atoms. In the second Se site, Se(2) is bonded in a water-like geometry to two equivalent Sn(1) atoms. In the third Se site, Se(3) is bonded in a bent 120 degrees geometry to one Fe(1) and one Sn(1) atom. is represented by the CIF card [CIF]
data_FeSn4H24C8(Se5N)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.016
_cell_length_b   11.016
_cell_length_c   11.016
_cell_angle_alpha   123.330
_cell_angle_beta   123.330
_cell_angle_gamma   84.322
_symmetry_Int_Tables_number   1
_cell_volume   892.931
_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
  Fe  Fe0  1  0.500  0.500  0.000  1.0
  Sn  Sn1  1  0.404  0.653  0.377  1.0
  Sn  Sn2  1  0.276  0.027  0.623  1.0
  Sn  Sn3  1  0.347  0.724  0.751  1.0
  Sn  Sn4  1  0.973  0.596  0.249  1.0
  H  H5  1  0.956  0.427  0.701  1.0
  H  H6  1  0.725  0.255  0.299  1.0
  H  H7  1  0.573  0.275  0.530  1.0
  H  H8  1  0.745  0.044  0.470  1.0
  H  H9  1  0.791  0.475  0.582  1.0
  H  H10  1  0.892  0.209  0.418  1.0
  H  H11  1  0.525  0.108  0.316  1.0
  H  H12  1  0.791  0.209  0.684  1.0
  H  H13  1  0.820  0.457  0.749  1.0
  H  H14  1  0.708  0.070  0.251  1.0
  H  H15  1  0.543  0.292  0.363  1.0
  H  H16  1  0.930  0.180  0.637  1.0
  H  H17  1  0.891  0.767  0.840  1.0
  H  H18  1  0.927  0.051  0.160  1.0
  H  H19  1  0.233  0.073  0.124  1.0
  H  H20  1  0.949  0.109  0.876  1.0
  H  H21  1  0.087  0.812  0.924  1.0
  H  H22  1  0.887  0.162  0.076  1.0
  H  H23  1  0.188  0.113  0.275  1.0
  H  H24  1  0.838  0.913  0.725  1.0
  H  H25  1  0.041  0.851  0.074  1.0
  H  H26  1  0.776  0.967  0.926  1.0
  H  H27  1  0.149  0.224  0.190  1.0
  H  H28  1  0.033  0.959  0.810  1.0
  C  C29  1  0.836  0.415  0.645  1.0
  C  C30  1  0.770  0.191  0.355  1.0
  C  C31  1  0.585  0.230  0.421  1.0
  C  C32  1  0.809  0.164  0.579  1.0
  C  C33  1  0.005  0.845  0.956  1.0
  C  C34  1  0.889  0.049  0.044  1.0
  C  C35  1  0.155  0.111  0.160  1.0
  C  C36  1  0.951  0.995  0.840  1.0
  Se  Se37  1  0.127  0.481  0.118  1.0
  Se  Se38  1  0.363  0.009  0.882  1.0
  Se  Se39  1  0.519  0.637  0.645  1.0
  Se  Se40  1  0.991  0.873  0.355  1.0
  Se  Se41  1  0.436  0.936  0.500  1.0
  Se  Se42  1  0.064  0.564  0.500  1.0
  Se  Se43  1  0.578  0.556  0.282  1.0
  Se  Se44  1  0.274  0.296  0.718  1.0
  Se  Se45  1  0.444  0.726  0.022  1.0
  Se  Se46  1  0.704  0.422  0.978  1.0
  N  N47  1  0.750  0.250  0.500  1.0
  N  N48  1  0.000  0.000  0.000  1.0
[/CIF]
.
The material structure described by Fe(Sn2Se5)2(N(CH3)4)2 crystallizes in the tetragonal I-4 space group. The structure consists of four tetramethylammonium molecules inside a Fe(Sn2Se5)2 framework. In the Fe(Sn2Se5)2 framework, Fe(1) is bonded to four equivalent Se(3) atoms to form FeSe4 tetrahedra that share corners with four equivalent Sn(1)Se4 tetrahedra. Sn(1) is bonded to one Se(2), one Se(3), and two equivalent Se(1) atoms to form SnSe4 tetrahedra that share  a cornercorner with one Fe(1)Se4 tetrahedra and corners with three equivalent Sn(1)Se4 tetrahedra. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a water-like geometry to two equivalent Sn(1) atoms. In the second Se site, Se(2) is bonded in a water-like geometry to two equivalent Sn(1) atoms. In the third Se site, Se(3) is bonded in a bent 120 degrees geometry to one Fe(1) and one Sn(1) atom. is represented by the CIF card [CIF]
data_FeSn4H24C8(Se5N)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.016
_cell_length_b   11.016
_cell_length_c   11.016
_cell_angle_alpha   123.330
_cell_angle_beta   123.330
_cell_angle_gamma   84.322
_symmetry_Int_Tables_number   1
_cell_volume   892.931
_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
  Fe  Fe0  1  0.500  0.500  0.000  1.0
  Sn  Sn1  1  0.404  0.653  0.377  1.0
  Sn  Sn2  1  0.276  0.027  0.623  1.0
  Sn  Sn3  1  0.347  0.724  0.751  1.0
  Sn  Sn4  1  0.973  0.596  0.249  1.0
  H  H5  1  0.956  0.427  0.701  1.0
  H  H6  1  0.725  0.255  0.299  1.0
  H  H7  1  0.573  0.275  0.530  1.0
  H  H8  1  0.745  0.044  0.470  1.0
  H  H9  1  0.791  0.475  0.582  1.0
  H  H10  1  0.892  0.209  0.418  1.0
  H  H11  1  0.525  0.108  0.316  1.0
  H  H12  1  0.791  0.209  0.684  1.0
  H  H13  1  0.820  0.457  0.749  1.0
  H  H14  1  0.708  0.070  0.251  1.0
  H  H15  1  0.543  0.292  0.363  1.0
  H  H16  1  0.930  0.180  0.637  1.0
  H  H17  1  0.891  0.767  0.840  1.0
  H  H18  1  0.927  0.051  0.160  1.0
  H  H19  1  0.233  0.073  0.124  1.0
  H  H20  1  0.949  0.109  0.876  1.0
  H  H21  1  0.087  0.812  0.924  1.0
  H  H22  1  0.887  0.162  0.076  1.0
  H  H23  1  0.188  0.113  0.275  1.0
  H  H24  1  0.838  0.913  0.725  1.0
  H  H25  1  0.041  0.851  0.074  1.0
  H  H26  1  0.776  0.967  0.926  1.0
  H  H27  1  0.149  0.224  0.190  1.0
  H  H28  1  0.033  0.959  0.810  1.0
  C  C29  1  0.836  0.415  0.645  1.0
  C  C30  1  0.770  0.191  0.355  1.0
  C  C31  1  0.585  0.230  0.421  1.0
  C  C32  1  0.809  0.164  0.579  1.0
  C  C33  1  0.005  0.845  0.956  1.0
  C  C34  1  0.889  0.049  0.044  1.0
  C  C35  1  0.155  0.111  0.160  1.0
  C  C36  1  0.951  0.995  0.840  1.0
  Se  Se37  1  0.127  0.481  0.118  1.0
  Se  Se38  1  0.363  0.009  0.882  1.0
  Se  Se39  1  0.519  0.637  0.645  1.0
  Se  Se40  1  0.991  0.873  0.355  1.0
  Se  Se41  1  0.436  0.936  0.500  1.0
  Se  Se42  1  0.064  0.564  0.500  1.0
  Se  Se43  1  0.578  0.556  0.282  1.0
  Se  Se44  1  0.274  0.296  0.718  1.0
  Se  Se45  1  0.444  0.726  0.022  1.0
  Se  Se46  1  0.704  0.422  0.978  1.0
  N  N47  1  0.750  0.250  0.500  1.0
  N  N48  1  0.000  0.000  0.000  1.0
[/CIF]
.