The crystal structure described by K2GeTe4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one Te(2), two equivalent Te(1), two equivalent Te(3), and two equivalent Te(4) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one Te(4), three equivalent Te(2), and three equivalent Te(3) atoms. Ge(1) is bonded in a distorted tetrahedral geometry to one Te(1), one Te(2), one Te(3), and one Te(4) atom. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded in a 4-coordinate geometry to two equivalent K(1), one Ge(1), and one Te(4) atom. In the second Te site, Te(2) is bonded to one K(1), three equivalent K(2), and one Ge(1) atom to form distorted TeK4Ge trigonal bipyramids that share corners with two equivalent Te(3)K5Ge pentagonal pyramids, corners with four equivalent Te(2)K4Ge trigonal bipyramids, edges with five equivalent Te(3)K5Ge pentagonal pyramids, and  an edgeedge with one Te(2)K4Ge trigonal bipyramid. In the third Te site, Te(3) is bonded to two equivalent K(1), three equivalent K(2), and one Ge(1) atom to form distorted TeK5Ge pentagonal pyramids that share corners with two equivalent Te(3)K5Ge pentagonal pyramids, corners with two equivalent Te(2)K4Ge trigonal bipyramids, edges with three equivalent Te(3)K5Ge pentagonal pyramids, and edges with five equivalent Te(2)K4Ge trigonal bipyramids. In the fourth Te site, Te(4) is bonded in a 5-coordinate geometry to one K(2), two equivalent K(1), one Ge(1), and one Te(1) atom. is represented by the CIF card [CIF]
data_K2GeTe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.617
_cell_length_b   10.053
_cell_length_c   12.801
_cell_angle_alpha   75.750
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1074.781
_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
  K  K0  1  0.925  0.195  0.653  1.0
  K  K1  1  0.425  0.305  0.347  1.0
  K  K2  1  0.075  0.805  0.347  1.0
  K  K3  1  0.575  0.695  0.653  1.0
  K  K4  1  0.564  0.213  0.955  1.0
  K  K5  1  0.064  0.287  0.045  1.0
  K  K6  1  0.436  0.787  0.045  1.0
  K  K7  1  0.936  0.713  0.955  1.0
  Ge  Ge8  1  0.638  0.963  0.257  1.0
  Ge  Ge9  1  0.138  0.537  0.743  1.0
  Ge  Ge10  1  0.362  0.037  0.743  1.0
  Ge  Ge11  1  0.862  0.463  0.257  1.0
  Te  Te12  1  0.729  0.045  0.429  1.0
  Te  Te13  1  0.229  0.455  0.571  1.0
  Te  Te14  1  0.271  0.955  0.571  1.0
  Te  Te15  1  0.771  0.545  0.429  1.0
  Te  Te16  1  0.344  0.530  0.884  1.0
  Te  Te17  1  0.844  0.970  0.116  1.0
  Te  Te18  1  0.656  0.470  0.116  1.0
  Te  Te19  1  0.156  0.030  0.884  1.0
  Te  Te20  1  0.360  0.042  0.202  1.0
  Te  Te21  1  0.860  0.458  0.798  1.0
  Te  Te22  1  0.640  0.958  0.798  1.0
  Te  Te23  1  0.140  0.542  0.202  1.0
  Te  Te24  1  0.527  0.718  0.350  1.0
  Te  Te25  1  0.027  0.782  0.650  1.0
  Te  Te26  1  0.473  0.282  0.650  1.0
  Te  Te27  1  0.973  0.218  0.350  1.0
[/CIF]
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The crystal structure described by K2GeTe4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one Te(2), two equivalent Te(1), two equivalent Te(3), and two equivalent Te(4) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one Te(4), three equivalent Te(2), and three equivalent Te(3) atoms. Ge(1) is bonded in a distorted tetrahedral geometry to one Te(1), one Te(2), one Te(3), and one Te(4) atom. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded in a 4-coordinate geometry to two equivalent K(1), one Ge(1), and one Te(4) atom. In the second Te site, Te(2) is bonded to one K(1), three equivalent K(2), and one Ge(1) atom to form distorted TeK4Ge trigonal bipyramids that share corners with two equivalent Te(3)K5Ge pentagonal pyramids, corners with four equivalent Te(2)K4Ge trigonal bipyramids, edges with five equivalent Te(3)K5Ge pentagonal pyramids, and  an edgeedge with one Te(2)K4Ge trigonal bipyramid. In the third Te site, Te(3) is bonded to two equivalent K(1), three equivalent K(2), and one Ge(1) atom to form distorted TeK5Ge pentagonal pyramids that share corners with two equivalent Te(3)K5Ge pentagonal pyramids, corners with two equivalent Te(2)K4Ge trigonal bipyramids, edges with three equivalent Te(3)K5Ge pentagonal pyramids, and edges with five equivalent Te(2)K4Ge trigonal bipyramids. In the fourth Te site, Te(4) is bonded in a 5-coordinate geometry to one K(2), two equivalent K(1), one Ge(1), and one Te(1) atom. is represented by the CIF card [CIF]
data_K2GeTe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.617
_cell_length_b   10.053
_cell_length_c   12.801
_cell_angle_alpha   75.750
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1074.781
_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
  K  K0  1  0.925  0.195  0.653  1.0
  K  K1  1  0.425  0.305  0.347  1.0
  K  K2  1  0.075  0.805  0.347  1.0
  K  K3  1  0.575  0.695  0.653  1.0
  K  K4  1  0.564  0.213  0.955  1.0
  K  K5  1  0.064  0.287  0.045  1.0
  K  K6  1  0.436  0.787  0.045  1.0
  K  K7  1  0.936  0.713  0.955  1.0
  Ge  Ge8  1  0.638  0.963  0.257  1.0
  Ge  Ge9  1  0.138  0.537  0.743  1.0
  Ge  Ge10  1  0.362  0.037  0.743  1.0
  Ge  Ge11  1  0.862  0.463  0.257  1.0
  Te  Te12  1  0.729  0.045  0.429  1.0
  Te  Te13  1  0.229  0.455  0.571  1.0
  Te  Te14  1  0.271  0.955  0.571  1.0
  Te  Te15  1  0.771  0.545  0.429  1.0
  Te  Te16  1  0.344  0.530  0.884  1.0
  Te  Te17  1  0.844  0.970  0.116  1.0
  Te  Te18  1  0.656  0.470  0.116  1.0
  Te  Te19  1  0.156  0.030  0.884  1.0
  Te  Te20  1  0.360  0.042  0.202  1.0
  Te  Te21  1  0.860  0.458  0.798  1.0
  Te  Te22  1  0.640  0.958  0.798  1.0
  Te  Te23  1  0.140  0.542  0.202  1.0
  Te  Te24  1  0.527  0.718  0.350  1.0
  Te  Te25  1  0.027  0.782  0.650  1.0
  Te  Te26  1  0.473  0.282  0.650  1.0
  Te  Te27  1  0.973  0.218  0.350  1.0
[/CIF]
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