The structure described by K7(FeTe2)4 crystallizes in the tetragonal P4_2/nmc space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 12-coordinate geometry to four equivalent Fe(1), four equivalent Te(1), and four equivalent Te(2) atoms. In the second K site, K(2) is bonded to four equivalent Te(2) atoms to form edge-sharing KTe4 tetrahedra. In the third K site, K(3) is bonded in a 4-coordinate geometry to two equivalent Te(1) and four equivalent Te(2) atoms. Fe(1) is bonded in a 4-coordinate geometry to one K(1), one Te(2), and three equivalent Te(1) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a 6-coordinate geometry to one K(1), two equivalent K(3), and three equivalent Fe(1) atoms. In the second Te site, Te(2) is bonded in a 8-coordinate geometry to one K(1), two equivalent K(2), four equivalent K(3), and one Fe(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K7(FeTe2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.233
_cell_length_b   12.233
_cell_length_c   8.698
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1301.605
_cell_formula_units_Z   2
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
  K  K0  1  0.000  0.000  0.000  1.0
  K  K1  1  0.500  0.500  0.500  1.0
  K  K2  1  0.500  0.000  0.958  1.0
  K  K3  1  0.500  0.000  0.458  1.0
  K  K4  1  0.000  0.500  0.542  1.0
  K  K5  1  0.000  0.500  0.042  1.0
  K  K6  1  0.758  0.242  0.000  1.0
  K  K7  1  0.758  0.758  0.000  1.0
  K  K8  1  0.242  0.242  0.000  1.0
  K  K9  1  0.242  0.758  0.000  1.0
  K  K10  1  0.742  0.258  0.500  1.0
  K  K11  1  0.742  0.742  0.500  1.0
  K  K12  1  0.258  0.258  0.500  1.0
  K  K13  1  0.258  0.742  0.500  1.0
  Fe  Fe14  1  0.500  0.395  0.894  1.0
  Fe  Fe15  1  0.500  0.605  0.894  1.0
  Fe  Fe16  1  0.895  0.000  0.394  1.0
  Fe  Fe17  1  0.105  0.000  0.394  1.0
  Fe  Fe18  1  0.000  0.105  0.606  1.0
  Fe  Fe19  1  0.000  0.895  0.606  1.0
  Fe  Fe20  1  0.605  0.500  0.106  1.0
  Fe  Fe21  1  0.395  0.500  0.106  1.0
  Te  Te22  1  0.500  0.319  0.175  1.0
  Te  Te23  1  0.500  0.681  0.175  1.0
  Te  Te24  1  0.819  0.000  0.675  1.0
  Te  Te25  1  0.181  0.000  0.675  1.0
  Te  Te26  1  0.000  0.181  0.325  1.0
  Te  Te27  1  0.000  0.819  0.325  1.0
  Te  Te28  1  0.681  0.500  0.825  1.0
  Te  Te29  1  0.319  0.500  0.825  1.0
  Te  Te30  1  0.500  0.773  0.714  1.0
  Te  Te31  1  0.500  0.227  0.714  1.0
  Te  Te32  1  0.273  0.000  0.214  1.0
  Te  Te33  1  0.727  0.000  0.214  1.0
  Te  Te34  1  0.000  0.727  0.786  1.0
  Te  Te35  1  0.000  0.273  0.786  1.0
  Te  Te36  1  0.227  0.500  0.286  1.0
  Te  Te37  1  0.773  0.500  0.286  1.0
[/CIF]
.
The structure described by K7(FeTe2)4 crystallizes in the tetragonal P4_2/nmc space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 12-coordinate geometry to four equivalent Fe(1), four equivalent Te(1), and four equivalent Te(2) atoms. In the second K site, K(2) is bonded to four equivalent Te(2) atoms to form edge-sharing KTe4 tetrahedra. In the third K site, K(3) is bonded in a 4-coordinate geometry to two equivalent Te(1) and four equivalent Te(2) atoms. Fe(1) is bonded in a 4-coordinate geometry to one K(1), one Te(2), and three equivalent Te(1) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a 6-coordinate geometry to one K(1), two equivalent K(3), and three equivalent Fe(1) atoms. In the second Te site, Te(2) is bonded in a 8-coordinate geometry to one K(1), two equivalent K(2), four equivalent K(3), and one Fe(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K7(FeTe2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.233
_cell_length_b   12.233
_cell_length_c   8.698
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1301.605
_cell_formula_units_Z   2
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
  K  K0  1  0.000  0.000  0.000  1.0
  K  K1  1  0.500  0.500  0.500  1.0
  K  K2  1  0.500  0.000  0.958  1.0
  K  K3  1  0.500  0.000  0.458  1.0
  K  K4  1  0.000  0.500  0.542  1.0
  K  K5  1  0.000  0.500  0.042  1.0
  K  K6  1  0.758  0.242  0.000  1.0
  K  K7  1  0.758  0.758  0.000  1.0
  K  K8  1  0.242  0.242  0.000  1.0
  K  K9  1  0.242  0.758  0.000  1.0
  K  K10  1  0.742  0.258  0.500  1.0
  K  K11  1  0.742  0.742  0.500  1.0
  K  K12  1  0.258  0.258  0.500  1.0
  K  K13  1  0.258  0.742  0.500  1.0
  Fe  Fe14  1  0.500  0.395  0.894  1.0
  Fe  Fe15  1  0.500  0.605  0.894  1.0
  Fe  Fe16  1  0.895  0.000  0.394  1.0
  Fe  Fe17  1  0.105  0.000  0.394  1.0
  Fe  Fe18  1  0.000  0.105  0.606  1.0
  Fe  Fe19  1  0.000  0.895  0.606  1.0
  Fe  Fe20  1  0.605  0.500  0.106  1.0
  Fe  Fe21  1  0.395  0.500  0.106  1.0
  Te  Te22  1  0.500  0.319  0.175  1.0
  Te  Te23  1  0.500  0.681  0.175  1.0
  Te  Te24  1  0.819  0.000  0.675  1.0
  Te  Te25  1  0.181  0.000  0.675  1.0
  Te  Te26  1  0.000  0.181  0.325  1.0
  Te  Te27  1  0.000  0.819  0.325  1.0
  Te  Te28  1  0.681  0.500  0.825  1.0
  Te  Te29  1  0.319  0.500  0.825  1.0
  Te  Te30  1  0.500  0.773  0.714  1.0
  Te  Te31  1  0.500  0.227  0.714  1.0
  Te  Te32  1  0.273  0.000  0.214  1.0
  Te  Te33  1  0.727  0.000  0.214  1.0
  Te  Te34  1  0.000  0.727  0.786  1.0
  Te  Te35  1  0.000  0.273  0.786  1.0
  Te  Te36  1  0.227  0.500  0.286  1.0
  Te  Te37  1  0.773  0.500  0.286  1.0
[/CIF]
.