The material structure described by Na2EuGeSe4 crystallizes in the tetragonal I-42m space group. Na(1) is bonded in a 4-coordinate geometry to four equivalent Se(1) atoms. Eu(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. Ge(1) is bonded in a tetrahedral geometry to four equivalent Se(1) atoms. Se(1) is bonded in a 4-coordinate geometry to two equivalent Na(1), two equivalent Eu(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_Na2EuGeSe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.429
_cell_length_b   6.429
_cell_length_c   6.429
_cell_angle_alpha   109.656
_cell_angle_beta   109.656
_cell_angle_gamma   109.102
_symmetry_Int_Tables_number   1
_cell_volume   204.517
_cell_formula_units_Z   1
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
  Na  Na0  1  0.000  0.500  0.500  1.0
  Na  Na1  1  0.500  0.000  0.500  1.0
  Eu  Eu2  1  0.500  0.500  0.000  1.0
  Ge  Ge3  1  0.000  0.000  0.000  1.0
  Se  Se4  1  0.004  0.004  0.378  1.0
  Se  Se5  1  0.374  0.996  0.000  1.0
  Se  Se6  1  0.996  0.374  0.000  1.0
  Se  Se7  1  0.626  0.626  0.622  1.0
[/CIF]
.
The material structure described by Na2EuGeSe4 crystallizes in the tetragonal I-42m space group. Na(1) is bonded in a 4-coordinate geometry to four equivalent Se(1) atoms. Eu(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. Ge(1) is bonded in a tetrahedral geometry to four equivalent Se(1) atoms. Se(1) is bonded in a 4-coordinate geometry to two equivalent Na(1), two equivalent Eu(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_Na2EuGeSe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.429
_cell_length_b   6.429
_cell_length_c   6.429
_cell_angle_alpha   109.656
_cell_angle_beta   109.656
_cell_angle_gamma   109.102
_symmetry_Int_Tables_number   1
_cell_volume   204.517
_cell_formula_units_Z   1
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
  Na  Na0  1  0.000  0.500  0.500  1.0
  Na  Na1  1  0.500  0.000  0.500  1.0
  Eu  Eu2  1  0.500  0.500  0.000  1.0
  Ge  Ge3  1  0.000  0.000  0.000  1.0
  Se  Se4  1  0.004  0.004  0.378  1.0
  Se  Se5  1  0.374  0.996  0.000  1.0
  Se  Se6  1  0.996  0.374  0.000  1.0
  Se  Se7  1  0.626  0.626  0.622  1.0
[/CIF]
.