The material described by Eu2GeS4 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one S(2), three equivalent S(1), and four equivalent S(3) atoms. In the second Eu site, Eu(2) is bonded in a 8-coordinate geometry to one S(1), three equivalent S(2), and four equivalent S(3) atoms. Ge(1) is bonded in a tetrahedral geometry to one S(1), one S(2), and two equivalent S(3) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to one Eu(2), three equivalent Eu(1), and one Ge(1) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to one Eu(1), three equivalent Eu(2), and one Ge(1) atom. In the third S site, S(3) is bonded to two equivalent Eu(1), two equivalent Eu(2), and one Ge(1) atom to form a mixture of edge, face, and corner-sharing SEu4Ge square pyramids. is represented by the CIF file [CIF]
data_Eu2GeS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.649
_cell_length_b   6.681
_cell_length_c   8.082
_cell_angle_alpha   72.098
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   341.593
_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
  Eu  Eu0  1  0.250  0.723  0.945  1.0
  Eu  Eu1  1  0.750  0.277  0.055  1.0
  Eu  Eu2  1  0.250  0.761  0.435  1.0
  Eu  Eu3  1  0.750  0.239  0.565  1.0
  Ge  Ge4  1  0.250  0.269  0.803  1.0
  Ge  Ge5  1  0.750  0.731  0.197  1.0
  S  S6  1  0.250  0.090  0.082  1.0
  S  S7  1  0.750  0.910  0.918  1.0
  S  S8  1  0.250  0.079  0.622  1.0
  S  S9  1  0.750  0.921  0.378  1.0
  S  S10  1  0.504  0.493  0.743  1.0
  S  S11  1  0.004  0.507  0.257  1.0
  S  S12  1  0.496  0.507  0.257  1.0
  S  S13  1  0.996  0.493  0.743  1.0
[/CIF]
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The material described by Eu2GeS4 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one S(2), three equivalent S(1), and four equivalent S(3) atoms. In the second Eu site, Eu(2) is bonded in a 8-coordinate geometry to one S(1), three equivalent S(2), and four equivalent S(3) atoms. Ge(1) is bonded in a tetrahedral geometry to one S(1), one S(2), and two equivalent S(3) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to one Eu(2), three equivalent Eu(1), and one Ge(1) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to one Eu(1), three equivalent Eu(2), and one Ge(1) atom. In the third S site, S(3) is bonded to two equivalent Eu(1), two equivalent Eu(2), and one Ge(1) atom to form a mixture of edge, face, and corner-sharing SEu4Ge square pyramids. is represented by the CIF file [CIF]
data_Eu2GeS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.649
_cell_length_b   6.681
_cell_length_c   8.082
_cell_angle_alpha   72.098
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   341.593
_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
  Eu  Eu0  1  0.250  0.723  0.945  1.0
  Eu  Eu1  1  0.750  0.277  0.055  1.0
  Eu  Eu2  1  0.250  0.761  0.435  1.0
  Eu  Eu3  1  0.750  0.239  0.565  1.0
  Ge  Ge4  1  0.250  0.269  0.803  1.0
  Ge  Ge5  1  0.750  0.731  0.197  1.0
  S  S6  1  0.250  0.090  0.082  1.0
  S  S7  1  0.750  0.910  0.918  1.0
  S  S8  1  0.250  0.079  0.622  1.0
  S  S9  1  0.750  0.921  0.378  1.0
  S  S10  1  0.504  0.493  0.743  1.0
  S  S11  1  0.004  0.507  0.257  1.0
  S  S12  1  0.496  0.507  0.257  1.0
  S  S13  1  0.996  0.493  0.743  1.0
[/CIF]
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