The compound described by KTbGeS4 crystallizes in the monoclinic P2_1 space group. K(1) is bonded in a 8-coordinate geometry to one S(3), two equivalent S(1), two equivalent S(4), and three equivalent S(2) atoms. Tb(1) is bonded to one S(2), two equivalent S(1), two equivalent S(3), and two equivalent S(4) atoms to form distorted TbS7 pentagonal bipyramids that share corners with two equivalent Tb(1)S7 pentagonal bipyramids,  a cornercorner with one Ge(1)S4 tetrahedra, edges with two equivalent Tb(1)S7 pentagonal bipyramids, and edges with three equivalent Ge(1)S4 tetrahedra. Ge(1) is bonded to one S(1), one S(2), one S(3), and one S(4) atom to form GeS4 tetrahedra that share  a cornercorner with one Tb(1)S7 pentagonal bipyramid and edges with three equivalent Tb(1)S7 pentagonal bipyramids. There are four inequivalent S sites. In the first S site, S(1) is bonded to two equivalent K(1), two equivalent Tb(1), and one Ge(1) atom to form distorted SK2Tb2Ge square pyramids that share corners with four equivalent S(1)K2Tb2Ge square pyramids, corners with five equivalent S(2)K3TbGe trigonal bipyramids, and edges with two equivalent S(2)K3TbGe trigonal bipyramids. In the second S site, S(2) is bonded to three equivalent K(1), one Tb(1), and one Ge(1) atom to form distorted SK3TbGe trigonal bipyramids that share corners with five equivalent S(1)K2Tb2Ge square pyramids, corners with two equivalent S(2)K3TbGe trigonal bipyramids, edges with two equivalent S(1)K2Tb2Ge square pyramids, and edges with two equivalent S(2)K3TbGe trigonal bipyramids. In the third S site, S(3) is bonded in a distorted see-saw-like geometry to one K(1), two equivalent Tb(1), and one Ge(1) atom. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to two equivalent K(1), two equivalent Tb(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_KTbGeS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.733
_cell_length_b   6.559
_cell_length_c   8.783
_cell_angle_alpha   72.710
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   370.327
_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  0.880  0.731  0.066  1.0
  K  K1  1  0.380  0.269  0.934  1.0
  Tb  Tb2  1  0.362  0.228  0.450  1.0
  Tb  Tb3  1  0.862  0.772  0.550  1.0
  Ge  Ge4  1  0.897  0.226  0.672  1.0
  Ge  Ge5  1  0.397  0.774  0.328  1.0
  S  S6  1  0.633  0.025  0.282  1.0
  S  S7  1  0.899  0.430  0.831  1.0
  S  S8  1  0.469  0.565  0.572  1.0
  S  S9  1  0.969  0.435  0.428  1.0
  S  S10  1  0.399  0.570  0.169  1.0
  S  S11  1  0.626  0.020  0.698  1.0
  S  S12  1  0.133  0.975  0.718  1.0
  S  S13  1  0.126  0.980  0.302  1.0
[/CIF]
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The compound described by KTbGeS4 crystallizes in the monoclinic P2_1 space group. K(1) is bonded in a 8-coordinate geometry to one S(3), two equivalent S(1), two equivalent S(4), and three equivalent S(2) atoms. Tb(1) is bonded to one S(2), two equivalent S(1), two equivalent S(3), and two equivalent S(4) atoms to form distorted TbS7 pentagonal bipyramids that share corners with two equivalent Tb(1)S7 pentagonal bipyramids,  a cornercorner with one Ge(1)S4 tetrahedra, edges with two equivalent Tb(1)S7 pentagonal bipyramids, and edges with three equivalent Ge(1)S4 tetrahedra. Ge(1) is bonded to one S(1), one S(2), one S(3), and one S(4) atom to form GeS4 tetrahedra that share  a cornercorner with one Tb(1)S7 pentagonal bipyramid and edges with three equivalent Tb(1)S7 pentagonal bipyramids. There are four inequivalent S sites. In the first S site, S(1) is bonded to two equivalent K(1), two equivalent Tb(1), and one Ge(1) atom to form distorted SK2Tb2Ge square pyramids that share corners with four equivalent S(1)K2Tb2Ge square pyramids, corners with five equivalent S(2)K3TbGe trigonal bipyramids, and edges with two equivalent S(2)K3TbGe trigonal bipyramids. In the second S site, S(2) is bonded to three equivalent K(1), one Tb(1), and one Ge(1) atom to form distorted SK3TbGe trigonal bipyramids that share corners with five equivalent S(1)K2Tb2Ge square pyramids, corners with two equivalent S(2)K3TbGe trigonal bipyramids, edges with two equivalent S(1)K2Tb2Ge square pyramids, and edges with two equivalent S(2)K3TbGe trigonal bipyramids. In the third S site, S(3) is bonded in a distorted see-saw-like geometry to one K(1), two equivalent Tb(1), and one Ge(1) atom. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to two equivalent K(1), two equivalent Tb(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_KTbGeS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.733
_cell_length_b   6.559
_cell_length_c   8.783
_cell_angle_alpha   72.710
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   370.327
_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  0.880  0.731  0.066  1.0
  K  K1  1  0.380  0.269  0.934  1.0
  Tb  Tb2  1  0.362  0.228  0.450  1.0
  Tb  Tb3  1  0.862  0.772  0.550  1.0
  Ge  Ge4  1  0.897  0.226  0.672  1.0
  Ge  Ge5  1  0.397  0.774  0.328  1.0
  S  S6  1  0.633  0.025  0.282  1.0
  S  S7  1  0.899  0.430  0.831  1.0
  S  S8  1  0.469  0.565  0.572  1.0
  S  S9  1  0.969  0.435  0.428  1.0
  S  S10  1  0.399  0.570  0.169  1.0
  S  S11  1  0.626  0.020  0.698  1.0
  S  S12  1  0.133  0.975  0.718  1.0
  S  S13  1  0.126  0.980  0.302  1.0
[/CIF]
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