The structure described by Na2Ge2ZnSe6 crystallizes in the tetragonal I4/mcm space group. Na(1) is bonded in a distorted square co-planar geometry to four equivalent Se(2) atoms. Zn(1) is bonded to four equivalent Se(2) atoms to form distorted ZnSe4 tetrahedra that share edges with two equivalent Ge(1)Se4 tetrahedra. Ge(1) is bonded to two equivalent Se(1) and two equivalent Se(2) atoms to form GeSe4 tetrahedra that share  an edgeedge with one Zn(1)Se4 tetrahedra and  an edgeedge with one Ge(1)Se4 tetrahedra. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in an L-shaped geometry to two equivalent Ge(1) atoms. In the second Se site, Se(2) is bonded to two equivalent Na(1), one Zn(1), and one Ge(1) atom to form a mixture of corner and edge-sharing SeNa2ZnGe trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Zn(GeSe3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.060
_cell_length_b   11.060
_cell_length_c   11.060
_cell_angle_alpha   137.884
_cell_angle_beta   137.884
_cell_angle_gamma   61.080
_symmetry_Int_Tables_number   1
_cell_volume   601.744
_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
  Na  Na0  1  0.383  0.383  0.000  1.0
  Na  Na1  1  0.883  0.883  0.000  1.0
  Na  Na2  1  0.617  0.617  0.000  1.0
  Na  Na3  1  0.117  0.117  0.000  1.0
  Zn  Zn4  1  0.750  0.250  0.500  1.0
  Zn  Zn5  1  0.250  0.750  0.500  1.0
  Ge  Ge6  1  0.915  0.415  0.500  1.0
  Ge  Ge7  1  0.415  0.915  0.500  1.0
  Ge  Ge8  1  0.085  0.585  0.500  1.0
  Ge  Ge9  1  0.585  0.085  0.500  1.0
  Se  Se10  1  0.838  0.338  0.176  1.0
  Se  Se11  1  0.162  0.662  0.824  1.0
  Se  Se12  1  0.338  0.162  0.500  1.0
  Se  Se13  1  0.662  0.838  0.500  1.0
  Se  Se14  1  0.672  0.505  0.500  1.0
  Se  Se15  1  0.005  0.172  0.500  1.0
  Se  Se16  1  0.172  0.672  0.167  1.0
  Se  Se17  1  0.505  0.005  0.833  1.0
  Se  Se18  1  0.328  0.495  0.500  1.0
  Se  Se19  1  0.995  0.828  0.500  1.0
  Se  Se20  1  0.828  0.328  0.833  1.0
  Se  Se21  1  0.495  0.995  0.167  1.0
[/CIF]
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The structure described by Na2Ge2ZnSe6 crystallizes in the tetragonal I4/mcm space group. Na(1) is bonded in a distorted square co-planar geometry to four equivalent Se(2) atoms. Zn(1) is bonded to four equivalent Se(2) atoms to form distorted ZnSe4 tetrahedra that share edges with two equivalent Ge(1)Se4 tetrahedra. Ge(1) is bonded to two equivalent Se(1) and two equivalent Se(2) atoms to form GeSe4 tetrahedra that share  an edgeedge with one Zn(1)Se4 tetrahedra and  an edgeedge with one Ge(1)Se4 tetrahedra. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in an L-shaped geometry to two equivalent Ge(1) atoms. In the second Se site, Se(2) is bonded to two equivalent Na(1), one Zn(1), and one Ge(1) atom to form a mixture of corner and edge-sharing SeNa2ZnGe trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Zn(GeSe3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.060
_cell_length_b   11.060
_cell_length_c   11.060
_cell_angle_alpha   137.884
_cell_angle_beta   137.884
_cell_angle_gamma   61.080
_symmetry_Int_Tables_number   1
_cell_volume   601.744
_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
  Na  Na0  1  0.383  0.383  0.000  1.0
  Na  Na1  1  0.883  0.883  0.000  1.0
  Na  Na2  1  0.617  0.617  0.000  1.0
  Na  Na3  1  0.117  0.117  0.000  1.0
  Zn  Zn4  1  0.750  0.250  0.500  1.0
  Zn  Zn5  1  0.250  0.750  0.500  1.0
  Ge  Ge6  1  0.915  0.415  0.500  1.0
  Ge  Ge7  1  0.415  0.915  0.500  1.0
  Ge  Ge8  1  0.085  0.585  0.500  1.0
  Ge  Ge9  1  0.585  0.085  0.500  1.0
  Se  Se10  1  0.838  0.338  0.176  1.0
  Se  Se11  1  0.162  0.662  0.824  1.0
  Se  Se12  1  0.338  0.162  0.500  1.0
  Se  Se13  1  0.662  0.838  0.500  1.0
  Se  Se14  1  0.672  0.505  0.500  1.0
  Se  Se15  1  0.005  0.172  0.500  1.0
  Se  Se16  1  0.172  0.672  0.167  1.0
  Se  Se17  1  0.505  0.005  0.833  1.0
  Se  Se18  1  0.328  0.495  0.500  1.0
  Se  Se19  1  0.995  0.828  0.500  1.0
  Se  Se20  1  0.828  0.328  0.833  1.0
  Se  Se21  1  0.495  0.995  0.167  1.0
[/CIF]
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