The compound described by RbEuGeS4 crystallizes in the monoclinic P2_1 space group. Rb(1) is bonded in a 8-coordinate geometry to one S(4), two equivalent S(2), two equivalent S(3), and three equivalent S(1) atoms. Eu(1) is bonded to one S(1), two equivalent S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted EuS7 pentagonal bipyramids that share corners with two equivalent Eu(1)S7 pentagonal bipyramids,  a cornercorner with one Ge(1)S4 tetrahedra, edges with two equivalent Eu(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 Eu(1)S7 pentagonal bipyramid and edges with three equivalent Eu(1)S7 pentagonal bipyramids. There are four inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Rb(1), one Eu(1), and one Ge(1) atom to form distorted SRb3EuGe trigonal bipyramids that share corners with five equivalent S(2)Rb2Eu2Ge square pyramids, corners with five equivalent S(3)Rb2Eu2Ge square pyramids, corners with two equivalent S(1)Rb3EuGe trigonal bipyramids, edges with two equivalent S(2)Rb2Eu2Ge square pyramids, edges with two equivalent S(3)Rb2Eu2Ge square pyramids, and edges with two equivalent S(1)Rb3EuGe trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent Rb(1), two equivalent Eu(1), and one Ge(1) atom to form distorted SRb2Eu2Ge square pyramids that share corners with four equivalent S(2)Rb2Eu2Ge square pyramids, corners with five equivalent S(1)Rb3EuGe trigonal bipyramids, edges with three equivalent S(3)Rb2Eu2Ge square pyramids, edges with two equivalent S(1)Rb3EuGe trigonal bipyramids, and  a faceface with one S(3)Rb2Eu2Ge square pyramid. In the third S site, S(3) is bonded to two equivalent Rb(1), two equivalent Eu(1), and one Ge(1) atom to form distorted SRb2Eu2Ge square pyramids that share corners with four equivalent S(3)Rb2Eu2Ge square pyramids, corners with five equivalent S(1)Rb3EuGe trigonal bipyramids, edges with three equivalent S(2)Rb2Eu2Ge square pyramids, edges with two equivalent S(1)Rb3EuGe trigonal bipyramids, and  a faceface with one S(2)Rb2Eu2Ge square pyramid. In the fourth S site, S(4) is bonded in a distorted see-saw-like geometry to one Rb(1), two equivalent Eu(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_RbEuGeS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.645
_cell_length_b   6.801
_cell_length_c   9.295
_cell_angle_alpha   71.471
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   398.269
_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  0.750  0.232  0.564  1.0
  Rb  Rb1  1  0.250  0.768  0.436  1.0
  Eu  Eu2  1  0.767  0.266  0.052  1.0
  Eu  Eu3  1  0.267  0.734  0.948  1.0
  Ge  Ge4  1  0.736  0.720  0.173  1.0
  Ge  Ge5  1  0.236  0.280  0.827  1.0
  S  S6  1  0.746  0.909  0.326  1.0
  S  S7  1  0.246  0.091  0.674  1.0
  S  S8  1  0.492  0.481  0.217  1.0
  S  S9  1  0.992  0.519  0.783  1.0
  S  S10  1  0.502  0.491  0.797  1.0
  S  S11  1  0.002  0.509  0.203  1.0
  S  S12  1  0.684  0.925  0.936  1.0
  S  S13  1  0.184  0.075  0.064  1.0
[/CIF]
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The compound described by RbEuGeS4 crystallizes in the monoclinic P2_1 space group. Rb(1) is bonded in a 8-coordinate geometry to one S(4), two equivalent S(2), two equivalent S(3), and three equivalent S(1) atoms. Eu(1) is bonded to one S(1), two equivalent S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted EuS7 pentagonal bipyramids that share corners with two equivalent Eu(1)S7 pentagonal bipyramids,  a cornercorner with one Ge(1)S4 tetrahedra, edges with two equivalent Eu(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 Eu(1)S7 pentagonal bipyramid and edges with three equivalent Eu(1)S7 pentagonal bipyramids. There are four inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Rb(1), one Eu(1), and one Ge(1) atom to form distorted SRb3EuGe trigonal bipyramids that share corners with five equivalent S(2)Rb2Eu2Ge square pyramids, corners with five equivalent S(3)Rb2Eu2Ge square pyramids, corners with two equivalent S(1)Rb3EuGe trigonal bipyramids, edges with two equivalent S(2)Rb2Eu2Ge square pyramids, edges with two equivalent S(3)Rb2Eu2Ge square pyramids, and edges with two equivalent S(1)Rb3EuGe trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent Rb(1), two equivalent Eu(1), and one Ge(1) atom to form distorted SRb2Eu2Ge square pyramids that share corners with four equivalent S(2)Rb2Eu2Ge square pyramids, corners with five equivalent S(1)Rb3EuGe trigonal bipyramids, edges with three equivalent S(3)Rb2Eu2Ge square pyramids, edges with two equivalent S(1)Rb3EuGe trigonal bipyramids, and  a faceface with one S(3)Rb2Eu2Ge square pyramid. In the third S site, S(3) is bonded to two equivalent Rb(1), two equivalent Eu(1), and one Ge(1) atom to form distorted SRb2Eu2Ge square pyramids that share corners with four equivalent S(3)Rb2Eu2Ge square pyramids, corners with five equivalent S(1)Rb3EuGe trigonal bipyramids, edges with three equivalent S(2)Rb2Eu2Ge square pyramids, edges with two equivalent S(1)Rb3EuGe trigonal bipyramids, and  a faceface with one S(2)Rb2Eu2Ge square pyramid. In the fourth S site, S(4) is bonded in a distorted see-saw-like geometry to one Rb(1), two equivalent Eu(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_RbEuGeS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.645
_cell_length_b   6.801
_cell_length_c   9.295
_cell_angle_alpha   71.471
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   398.269
_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  0.750  0.232  0.564  1.0
  Rb  Rb1  1  0.250  0.768  0.436  1.0
  Eu  Eu2  1  0.767  0.266  0.052  1.0
  Eu  Eu3  1  0.267  0.734  0.948  1.0
  Ge  Ge4  1  0.736  0.720  0.173  1.0
  Ge  Ge5  1  0.236  0.280  0.827  1.0
  S  S6  1  0.746  0.909  0.326  1.0
  S  S7  1  0.246  0.091  0.674  1.0
  S  S8  1  0.492  0.481  0.217  1.0
  S  S9  1  0.992  0.519  0.783  1.0
  S  S10  1  0.502  0.491  0.797  1.0
  S  S11  1  0.002  0.509  0.203  1.0
  S  S12  1  0.684  0.925  0.936  1.0
  S  S13  1  0.184  0.075  0.064  1.0
[/CIF]
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