The crystal structure described by Na4Ge5O12 crystallizes in the trigonal P-3 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(2) atoms. In the second Ge site, Ge(2) is bonded to six equivalent O(2) atoms to form distorted edge-sharing GeO6 pentagonal pyramids. In the third Ge site, Ge(3) is bonded in an octahedral geometry to six equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Na(1), two equivalent Na(2), one Ge(1), and one Ge(3) atom. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Na(1), one Ge(1), and two equivalent Ge(2) atoms. is represented by the CIF file [CIF]
data_Na4Ge5O12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.266
_cell_length_b   5.266
_cell_length_c   9.417
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   226.132
_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  0.000  0.311  1.0
  Na  Na1  1  0.333  0.667  0.096  1.0
  Na  Na2  1  0.667  0.333  0.904  1.0
  Na  Na3  1  0.000  0.000  0.689  1.0
  Ge  Ge4  1  0.667  0.333  0.212  1.0
  Ge  Ge5  1  0.667  0.333  0.523  1.0
  Ge  Ge6  1  0.333  0.667  0.477  1.0
  Ge  Ge7  1  0.000  0.000  0.000  1.0
  Ge  Ge8  1  0.333  0.667  0.788  1.0
  O  O9  1  0.919  0.672  0.124  1.0
  O  O10  1  0.328  0.246  0.124  1.0
  O  O11  1  0.754  0.081  0.124  1.0
  O  O12  1  0.603  0.579  0.385  1.0
  O  O13  1  0.421  0.024  0.385  1.0
  O  O14  1  0.976  0.397  0.385  1.0
  O  O15  1  0.672  0.754  0.876  1.0
  O  O16  1  0.246  0.919  0.876  1.0
  O  O17  1  0.081  0.328  0.876  1.0
  O  O18  1  0.397  0.421  0.615  1.0
  O  O19  1  0.579  0.976  0.615  1.0
  O  O20  1  0.024  0.603  0.615  1.0
[/CIF]
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The crystal structure described by Na4Ge5O12 crystallizes in the trigonal P-3 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(2) atoms. In the second Ge site, Ge(2) is bonded to six equivalent O(2) atoms to form distorted edge-sharing GeO6 pentagonal pyramids. In the third Ge site, Ge(3) is bonded in an octahedral geometry to six equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Na(1), two equivalent Na(2), one Ge(1), and one Ge(3) atom. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Na(1), one Ge(1), and two equivalent Ge(2) atoms. is represented by the CIF file [CIF]
data_Na4Ge5O12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.266
_cell_length_b   5.266
_cell_length_c   9.417
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   226.132
_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  0.000  0.311  1.0
  Na  Na1  1  0.333  0.667  0.096  1.0
  Na  Na2  1  0.667  0.333  0.904  1.0
  Na  Na3  1  0.000  0.000  0.689  1.0
  Ge  Ge4  1  0.667  0.333  0.212  1.0
  Ge  Ge5  1  0.667  0.333  0.523  1.0
  Ge  Ge6  1  0.333  0.667  0.477  1.0
  Ge  Ge7  1  0.000  0.000  0.000  1.0
  Ge  Ge8  1  0.333  0.667  0.788  1.0
  O  O9  1  0.919  0.672  0.124  1.0
  O  O10  1  0.328  0.246  0.124  1.0
  O  O11  1  0.754  0.081  0.124  1.0
  O  O12  1  0.603  0.579  0.385  1.0
  O  O13  1  0.421  0.024  0.385  1.0
  O  O14  1  0.976  0.397  0.385  1.0
  O  O15  1  0.672  0.754  0.876  1.0
  O  O16  1  0.246  0.919  0.876  1.0
  O  O17  1  0.081  0.328  0.876  1.0
  O  O18  1  0.397  0.421  0.615  1.0
  O  O19  1  0.579  0.976  0.615  1.0
  O  O20  1  0.024  0.603  0.615  1.0
[/CIF]
.