The compound described by Rb4Cu8(GeS4)3 crystallizes in the tetragonal I-4c2 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to two equivalent S(1) and two equivalent S(2) atoms. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to four equivalent S(3) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a trigonal planar geometry to one S(1), one S(2), and one S(3) atom. In the second Cu site, Cu(2) is bonded in a trigonal planar geometry to one S(1), one S(2), and one S(3) atom. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a tetrahedral geometry to two equivalent S(1) and two equivalent S(3) atoms. In the second Ge site, Ge(2) is bonded in a tetrahedral geometry to four equivalent S(2) atoms. There are three inequivalent S sites. In the first S site, S(2) is bonded to one Rb(1), one Cu(1), one Cu(2), and one Ge(2) atom to form corner-sharing SRbCu2Ge tetrahedra. In the second S site, S(3) is bonded in a 5-coordinate geometry to two equivalent Rb(2), one Cu(1), one Cu(2), and one Ge(1) atom. In the third S site, S(1) is bonded to one Rb(1), one Cu(1), one Cu(2), and one Ge(1) atom to form distorted corner-sharing SRbCu2Ge trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb4Cu8(GeS4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.694
_cell_length_b   12.694
_cell_length_c   12.338
_cell_angle_alpha   60.925
_cell_angle_beta   119.075
_cell_angle_gamma   121.851
_symmetry_Int_Tables_number   1
_cell_volume   1403.671
_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
  Rb  Rb0  1  0.574  0.074  0.074  1.0
  Rb  Rb1  1  0.926  0.426  0.426  1.0
  Rb  Rb2  1  0.074  0.574  0.926  1.0
  Rb  Rb3  1  0.426  0.926  0.574  1.0
  Rb  Rb4  1  0.099  0.901  0.599  1.0
  Rb  Rb5  1  0.401  0.599  0.901  1.0
  Rb  Rb6  1  0.599  0.401  0.099  1.0
  Rb  Rb7  1  0.901  0.099  0.401  1.0
  Cu  Cu8  1  0.909  0.728  0.091  1.0
  Cu  Cu9  1  0.909  0.091  0.728  1.0
  Cu  Cu10  1  0.909  0.091  0.091  1.0
  Cu  Cu11  1  0.272  0.091  0.091  1.0
  Cu  Cu12  1  0.409  0.228  0.591  1.0
  Cu  Cu13  1  0.409  0.591  0.228  1.0
  Cu  Cu14  1  0.409  0.591  0.591  1.0
  Cu  Cu15  1  0.772  0.591  0.591  1.0
  Cu  Cu16  1  0.087  0.272  0.911  1.0
  Cu  Cu17  1  0.096  0.911  0.272  1.0
  Cu  Cu18  1  0.089  0.904  0.913  1.0
  Cu  Cu19  1  0.728  0.913  0.904  1.0
  Cu  Cu20  1  0.587  0.772  0.404  1.0
  Cu  Cu21  1  0.589  0.404  0.772  1.0
  Cu  Cu22  1  0.596  0.411  0.413  1.0
  Cu  Cu23  1  0.228  0.413  0.411  1.0
  Ge  Ge24  1  0.751  0.751  0.249  1.0
  Ge  Ge25  1  0.249  0.249  0.751  1.0
  Ge  Ge26  1  0.750  0.250  0.750  1.0
  Ge  Ge27  1  0.250  0.750  0.250  1.0
  Ge  Ge28  1  0.749  0.749  0.749  1.0
  Ge  Ge29  1  0.251  0.251  0.251  1.0
  S  S30  1  0.925  0.720  0.283  1.0
  S  S31  1  0.078  0.283  0.720  1.0
  S  S32  1  0.717  0.922  0.075  1.0
  S  S33  1  0.280  0.075  0.922  1.0
  S  S34  1  0.568  0.214  0.780  1.0
  S  S35  1  0.426  0.780  0.214  1.0
  S  S36  1  0.220  0.574  0.432  1.0
  S  S37  1  0.786  0.432  0.574  1.0
  S  S38  1  0.926  0.280  0.932  1.0
  S  S39  1  0.068  0.714  0.074  1.0
  S  S40  1  0.720  0.074  0.714  1.0
  S  S41  1  0.286  0.932  0.280  1.0
  S  S42  1  0.578  0.783  0.575  1.0
  S  S43  1  0.425  0.220  0.422  1.0
  S  S44  1  0.217  0.422  0.220  1.0
  S  S45  1  0.780  0.575  0.783  1.0
  S  S46  1  0.932  0.930  0.721  1.0
  S  S47  1  0.070  0.068  0.281  1.0
  S  S48  1  0.719  0.721  0.930  1.0
  S  S49  1  0.279  0.281  0.068  1.0
  S  S50  1  0.570  0.568  0.221  1.0
  S  S51  1  0.432  0.430  0.781  1.0
  S  S52  1  0.219  0.221  0.568  1.0
  S  S53  1  0.779  0.781  0.430  1.0
[/CIF]
.
The compound described by Rb4Cu8(GeS4)3 crystallizes in the tetragonal I-4c2 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to two equivalent S(1) and two equivalent S(2) atoms. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to four equivalent S(3) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a trigonal planar geometry to one S(1), one S(2), and one S(3) atom. In the second Cu site, Cu(2) is bonded in a trigonal planar geometry to one S(1), one S(2), and one S(3) atom. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a tetrahedral geometry to two equivalent S(1) and two equivalent S(3) atoms. In the second Ge site, Ge(2) is bonded in a tetrahedral geometry to four equivalent S(2) atoms. There are three inequivalent S sites. In the first S site, S(2) is bonded to one Rb(1), one Cu(1), one Cu(2), and one Ge(2) atom to form corner-sharing SRbCu2Ge tetrahedra. In the second S site, S(3) is bonded in a 5-coordinate geometry to two equivalent Rb(2), one Cu(1), one Cu(2), and one Ge(1) atom. In the third S site, S(1) is bonded to one Rb(1), one Cu(1), one Cu(2), and one Ge(1) atom to form distorted corner-sharing SRbCu2Ge trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb4Cu8(GeS4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.694
_cell_length_b   12.694
_cell_length_c   12.338
_cell_angle_alpha   60.925
_cell_angle_beta   119.075
_cell_angle_gamma   121.851
_symmetry_Int_Tables_number   1
_cell_volume   1403.671
_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
  Rb  Rb0  1  0.574  0.074  0.074  1.0
  Rb  Rb1  1  0.926  0.426  0.426  1.0
  Rb  Rb2  1  0.074  0.574  0.926  1.0
  Rb  Rb3  1  0.426  0.926  0.574  1.0
  Rb  Rb4  1  0.099  0.901  0.599  1.0
  Rb  Rb5  1  0.401  0.599  0.901  1.0
  Rb  Rb6  1  0.599  0.401  0.099  1.0
  Rb  Rb7  1  0.901  0.099  0.401  1.0
  Cu  Cu8  1  0.909  0.728  0.091  1.0
  Cu  Cu9  1  0.909  0.091  0.728  1.0
  Cu  Cu10  1  0.909  0.091  0.091  1.0
  Cu  Cu11  1  0.272  0.091  0.091  1.0
  Cu  Cu12  1  0.409  0.228  0.591  1.0
  Cu  Cu13  1  0.409  0.591  0.228  1.0
  Cu  Cu14  1  0.409  0.591  0.591  1.0
  Cu  Cu15  1  0.772  0.591  0.591  1.0
  Cu  Cu16  1  0.087  0.272  0.911  1.0
  Cu  Cu17  1  0.096  0.911  0.272  1.0
  Cu  Cu18  1  0.089  0.904  0.913  1.0
  Cu  Cu19  1  0.728  0.913  0.904  1.0
  Cu  Cu20  1  0.587  0.772  0.404  1.0
  Cu  Cu21  1  0.589  0.404  0.772  1.0
  Cu  Cu22  1  0.596  0.411  0.413  1.0
  Cu  Cu23  1  0.228  0.413  0.411  1.0
  Ge  Ge24  1  0.751  0.751  0.249  1.0
  Ge  Ge25  1  0.249  0.249  0.751  1.0
  Ge  Ge26  1  0.750  0.250  0.750  1.0
  Ge  Ge27  1  0.250  0.750  0.250  1.0
  Ge  Ge28  1  0.749  0.749  0.749  1.0
  Ge  Ge29  1  0.251  0.251  0.251  1.0
  S  S30  1  0.925  0.720  0.283  1.0
  S  S31  1  0.078  0.283  0.720  1.0
  S  S32  1  0.717  0.922  0.075  1.0
  S  S33  1  0.280  0.075  0.922  1.0
  S  S34  1  0.568  0.214  0.780  1.0
  S  S35  1  0.426  0.780  0.214  1.0
  S  S36  1  0.220  0.574  0.432  1.0
  S  S37  1  0.786  0.432  0.574  1.0
  S  S38  1  0.926  0.280  0.932  1.0
  S  S39  1  0.068  0.714  0.074  1.0
  S  S40  1  0.720  0.074  0.714  1.0
  S  S41  1  0.286  0.932  0.280  1.0
  S  S42  1  0.578  0.783  0.575  1.0
  S  S43  1  0.425  0.220  0.422  1.0
  S  S44  1  0.217  0.422  0.220  1.0
  S  S45  1  0.780  0.575  0.783  1.0
  S  S46  1  0.932  0.930  0.721  1.0
  S  S47  1  0.070  0.068  0.281  1.0
  S  S48  1  0.719  0.721  0.930  1.0
  S  S49  1  0.279  0.281  0.068  1.0
  S  S50  1  0.570  0.568  0.221  1.0
  S  S51  1  0.432  0.430  0.781  1.0
  S  S52  1  0.219  0.221  0.568  1.0
  S  S53  1  0.779  0.781  0.430  1.0
[/CIF]
.