The crystal structure described by Eu2Ga2GeS7 crystallizes in the tetragonal P-42_1m space group. Eu(1) is bonded in a 8-coordinate geometry to one S(2), three equivalent S(1), and four equivalent S(3) atoms. Ga(1) is bonded to one S(1), one S(2), and two equivalent S(3) atoms to form distorted GaS4 trigonal pyramids that share corners with two equivalent Ge(1)S4 tetrahedra and  a cornercorner with one Ga(1)S4 trigonal pyramid. Ge(1) is bonded to four equivalent S(3) atoms to form GeS4 tetrahedra that share corners with four equivalent Ga(1)S4 trigonal pyramids. There are three inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Eu(1) and one Ga(1) atom to form SEu3Ga tetrahedra that share corners with two equivalent S(2)Eu2Ga2 tetrahedra, corners with four equivalent S(1)Eu3Ga tetrahedra,  an edgeedge with one S(2)Eu2Ga2 tetrahedra, and  an edgeedge with one S(1)Eu3Ga tetrahedra. In the second S site, S(2) is bonded to two equivalent Eu(1) and two equivalent Ga(1) atoms to form a mixture of edge and corner-sharing SEu2Ga2 tetrahedra. In the third S site, S(3) is bonded in a 4-coordinate geometry to two equivalent Eu(1), one Ga(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_Eu2Ga2GeS7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.695
_cell_length_b   9.695
_cell_length_c   6.356
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   597.373
_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  0.847  0.653  0.517  1.0
  Eu  Eu1  1  0.653  0.153  0.483  1.0
  Eu  Eu2  1  0.153  0.347  0.517  1.0
  Eu  Eu3  1  0.347  0.847  0.483  1.0
  Ga  Ga4  1  0.353  0.147  0.970  1.0
  Ga  Ga5  1  0.147  0.647  0.030  1.0
  Ga  Ga6  1  0.647  0.853  0.970  1.0
  Ga  Ga7  1  0.853  0.353  0.030  1.0
  Ge  Ge8  1  0.500  0.500  0.000  1.0
  Ge  Ge9  1  0.000  0.000  0.000  1.0
  S  S10  1  0.355  0.145  0.316  1.0
  S  S11  1  0.145  0.645  0.684  1.0
  S  S12  1  0.645  0.855  0.316  1.0
  S  S13  1  0.855  0.355  0.684  1.0
  S  S14  1  0.000  0.500  0.202  1.0
  S  S15  1  0.500  0.000  0.798  1.0
  S  S16  1  0.341  0.581  0.226  1.0
  S  S17  1  0.159  0.081  0.774  1.0
  S  S18  1  0.659  0.419  0.226  1.0
  S  S19  1  0.841  0.919  0.774  1.0
  S  S20  1  0.581  0.659  0.774  1.0
  S  S21  1  0.919  0.159  0.226  1.0
  S  S22  1  0.419  0.341  0.774  1.0
  S  S23  1  0.081  0.841  0.226  1.0
[/CIF]
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The crystal structure described by Eu2Ga2GeS7 crystallizes in the tetragonal P-42_1m space group. Eu(1) is bonded in a 8-coordinate geometry to one S(2), three equivalent S(1), and four equivalent S(3) atoms. Ga(1) is bonded to one S(1), one S(2), and two equivalent S(3) atoms to form distorted GaS4 trigonal pyramids that share corners with two equivalent Ge(1)S4 tetrahedra and  a cornercorner with one Ga(1)S4 trigonal pyramid. Ge(1) is bonded to four equivalent S(3) atoms to form GeS4 tetrahedra that share corners with four equivalent Ga(1)S4 trigonal pyramids. There are three inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Eu(1) and one Ga(1) atom to form SEu3Ga tetrahedra that share corners with two equivalent S(2)Eu2Ga2 tetrahedra, corners with four equivalent S(1)Eu3Ga tetrahedra,  an edgeedge with one S(2)Eu2Ga2 tetrahedra, and  an edgeedge with one S(1)Eu3Ga tetrahedra. In the second S site, S(2) is bonded to two equivalent Eu(1) and two equivalent Ga(1) atoms to form a mixture of edge and corner-sharing SEu2Ga2 tetrahedra. In the third S site, S(3) is bonded in a 4-coordinate geometry to two equivalent Eu(1), one Ga(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_Eu2Ga2GeS7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.695
_cell_length_b   9.695
_cell_length_c   6.356
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   597.373
_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  0.847  0.653  0.517  1.0
  Eu  Eu1  1  0.653  0.153  0.483  1.0
  Eu  Eu2  1  0.153  0.347  0.517  1.0
  Eu  Eu3  1  0.347  0.847  0.483  1.0
  Ga  Ga4  1  0.353  0.147  0.970  1.0
  Ga  Ga5  1  0.147  0.647  0.030  1.0
  Ga  Ga6  1  0.647  0.853  0.970  1.0
  Ga  Ga7  1  0.853  0.353  0.030  1.0
  Ge  Ge8  1  0.500  0.500  0.000  1.0
  Ge  Ge9  1  0.000  0.000  0.000  1.0
  S  S10  1  0.355  0.145  0.316  1.0
  S  S11  1  0.145  0.645  0.684  1.0
  S  S12  1  0.645  0.855  0.316  1.0
  S  S13  1  0.855  0.355  0.684  1.0
  S  S14  1  0.000  0.500  0.202  1.0
  S  S15  1  0.500  0.000  0.798  1.0
  S  S16  1  0.341  0.581  0.226  1.0
  S  S17  1  0.159  0.081  0.774  1.0
  S  S18  1  0.659  0.419  0.226  1.0
  S  S19  1  0.841  0.919  0.774  1.0
  S  S20  1  0.581  0.659  0.774  1.0
  S  S21  1  0.919  0.159  0.226  1.0
  S  S22  1  0.419  0.341  0.774  1.0
  S  S23  1  0.081  0.841  0.226  1.0
[/CIF]
.