The compound described by Sr2GeSe4 crystallizes in the orthorhombic Ama2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one Se(1), two equivalent Se(2), and four equivalent Se(3) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to two equivalent Se(1), two equivalent Se(2), and four equivalent Se(3) atoms. Ge(1) is bonded in a tetrahedral geometry to one Se(1), one Se(2), and two equivalent Se(3) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded to one Sr(1), two equivalent Sr(2), and one Ge(1) atom to form SeSr3Ge trigonal pyramids that share corners with three equivalent Se(2)Sr4Ge trigonal bipyramids, corners with two equivalent Se(1)Sr3Ge trigonal pyramids, and edges with two equivalent Se(2)Sr4Ge trigonal bipyramids. In the second Se site, Se(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and one Ge(1) atom to form distorted SeSr4Ge trigonal bipyramids that share corners with four equivalent Se(2)Sr4Ge trigonal bipyramids, corners with three equivalent Se(1)Sr3Ge trigonal pyramids, and edges with two equivalent Se(1)Sr3Ge trigonal pyramids. In the third Se site, Se(3) is bonded in a 5-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2GeSe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.509
_cell_length_b   6.509
_cell_length_c   10.367
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   109.989
_symmetry_Int_Tables_number   1
_cell_volume   412.764
_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
  Sr  Sr0  1  0.745  0.365  0.250  1.0
  Sr  Sr1  1  0.365  0.745  0.750  1.0
  Sr  Sr2  1  0.001  0.001  0.500  1.0
  Sr  Sr3  1  0.001  0.001  0.000  1.0
  Ge  Ge4  1  0.764  0.311  0.750  1.0
  Ge  Ge5  1  0.311  0.764  0.250  1.0
  Se  Se6  1  0.264  0.111  0.250  1.0
  Se  Se7  1  0.111  0.264  0.750  1.0
  Se  Se8  1  0.694  0.837  0.250  1.0
  Se  Se9  1  0.837  0.694  0.750  1.0
  Se  Se10  1  0.137  0.577  0.437  1.0
  Se  Se11  1  0.577  0.137  0.563  1.0
  Se  Se12  1  0.137  0.577  0.063  1.0
  Se  Se13  1  0.577  0.137  0.937  1.0
[/CIF]
.
The compound described by Sr2GeSe4 crystallizes in the orthorhombic Ama2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one Se(1), two equivalent Se(2), and four equivalent Se(3) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to two equivalent Se(1), two equivalent Se(2), and four equivalent Se(3) atoms. Ge(1) is bonded in a tetrahedral geometry to one Se(1), one Se(2), and two equivalent Se(3) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded to one Sr(1), two equivalent Sr(2), and one Ge(1) atom to form SeSr3Ge trigonal pyramids that share corners with three equivalent Se(2)Sr4Ge trigonal bipyramids, corners with two equivalent Se(1)Sr3Ge trigonal pyramids, and edges with two equivalent Se(2)Sr4Ge trigonal bipyramids. In the second Se site, Se(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and one Ge(1) atom to form distorted SeSr4Ge trigonal bipyramids that share corners with four equivalent Se(2)Sr4Ge trigonal bipyramids, corners with three equivalent Se(1)Sr3Ge trigonal pyramids, and edges with two equivalent Se(1)Sr3Ge trigonal pyramids. In the third Se site, Se(3) is bonded in a 5-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2GeSe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.509
_cell_length_b   6.509
_cell_length_c   10.367
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   109.989
_symmetry_Int_Tables_number   1
_cell_volume   412.764
_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
  Sr  Sr0  1  0.745  0.365  0.250  1.0
  Sr  Sr1  1  0.365  0.745  0.750  1.0
  Sr  Sr2  1  0.001  0.001  0.500  1.0
  Sr  Sr3  1  0.001  0.001  0.000  1.0
  Ge  Ge4  1  0.764  0.311  0.750  1.0
  Ge  Ge5  1  0.311  0.764  0.250  1.0
  Se  Se6  1  0.264  0.111  0.250  1.0
  Se  Se7  1  0.111  0.264  0.750  1.0
  Se  Se8  1  0.694  0.837  0.250  1.0
  Se  Se9  1  0.837  0.694  0.750  1.0
  Se  Se10  1  0.137  0.577  0.437  1.0
  Se  Se11  1  0.577  0.137  0.563  1.0
  Se  Se12  1  0.137  0.577  0.063  1.0
  Se  Se13  1  0.577  0.137  0.937  1.0
[/CIF]
.