The structure described by Na4Ga8Ge15 crystallizes in the cubic Pm-3n space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted body-centered cubic geometry to eight equivalent Ga(1) atoms. In the second Na site, Na(2) is bonded in a 8-coordinate geometry to eight equivalent Ge(2) atoms. Ga(1) is bonded in a 5-coordinate geometry to one Na(1), one Ga(1), and three equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a tetrahedral geometry to four equivalent Ge(2) atoms. In the second Ge site, Ge(2) is bonded in a 4-coordinate geometry to two equivalent Na(2), two equivalent Ga(1), one Ge(1), and one Ge(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na4Ga8Ge15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.857
_cell_length_b   10.857
_cell_length_c   10.857
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1279.903
_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  0.500  0.500  0.500  1.0
  Na  Na1  1  0.000  0.000  0.000  1.0
  Na  Na2  1  0.500  0.000  0.750  1.0
  Na  Na3  1  0.000  0.250  0.500  1.0
  Na  Na4  1  0.750  0.500  0.000  1.0
  Na  Na5  1  0.500  0.000  0.250  1.0
  Na  Na6  1  0.000  0.750  0.500  1.0
  Na  Na7  1  0.250  0.500  0.000  1.0
  Ga  Ga8  1  0.682  0.318  0.682  1.0
  Ga  Ga9  1  0.318  0.682  0.318  1.0
  Ga  Ga10  1  0.682  0.682  0.318  1.0
  Ga  Ga11  1  0.318  0.318  0.682  1.0
  Ga  Ga12  1  0.318  0.682  0.682  1.0
  Ga  Ga13  1  0.682  0.318  0.318  1.0
  Ga  Ga14  1  0.318  0.318  0.318  1.0
  Ga  Ga15  1  0.682  0.682  0.682  1.0
  Ga  Ga16  1  0.182  0.182  0.818  1.0
  Ga  Ga17  1  0.818  0.818  0.182  1.0
  Ga  Ga18  1  0.182  0.818  0.182  1.0
  Ga  Ga19  1  0.818  0.182  0.818  1.0
  Ga  Ga20  1  0.818  0.182  0.182  1.0
  Ga  Ga21  1  0.182  0.818  0.818  1.0
  Ga  Ga22  1  0.818  0.818  0.818  1.0
  Ga  Ga23  1  0.182  0.182  0.182  1.0
  Ge  Ge24  1  0.000  0.500  0.750  1.0
  Ge  Ge25  1  0.500  0.250  0.000  1.0
  Ge  Ge26  1  0.750  0.000  0.500  1.0
  Ge  Ge27  1  0.000  0.500  0.250  1.0
  Ge  Ge28  1  0.500  0.750  0.000  1.0
  Ge  Ge29  1  0.250  0.000  0.500  1.0
  Ge  Ge30  1  0.615  0.189  0.500  1.0
  Ge  Ge31  1  0.811  0.500  0.615  1.0
  Ge  Ge32  1  0.500  0.385  0.811  1.0
  Ge  Ge33  1  0.385  0.811  0.500  1.0
  Ge  Ge34  1  0.189  0.500  0.385  1.0
  Ge  Ge35  1  0.500  0.615  0.189  1.0
  Ge  Ge36  1  0.615  0.811  0.500  1.0
  Ge  Ge37  1  0.811  0.500  0.385  1.0
  Ge  Ge38  1  0.385  0.189  0.500  1.0
  Ge  Ge39  1  0.189  0.500  0.615  1.0
  Ge  Ge40  1  0.500  0.615  0.811  1.0
  Ge  Ge41  1  0.500  0.385  0.189  1.0
  Ge  Ge42  1  0.115  0.000  0.689  1.0
  Ge  Ge43  1  0.311  0.115  0.000  1.0
  Ge  Ge44  1  0.000  0.311  0.885  1.0
  Ge  Ge45  1  0.885  0.000  0.311  1.0
  Ge  Ge46  1  0.689  0.885  0.000  1.0
  Ge  Ge47  1  0.000  0.689  0.115  1.0
  Ge  Ge48  1  0.115  0.000  0.311  1.0
  Ge  Ge49  1  0.311  0.885  0.000  1.0
  Ge  Ge50  1  0.885  0.000  0.689  1.0
  Ge  Ge51  1  0.689  0.115  0.000  1.0
  Ge  Ge52  1  0.000  0.311  0.115  1.0
  Ge  Ge53  1  0.000  0.689  0.885  1.0
[/CIF]
.
The structure described by Na4Ga8Ge15 crystallizes in the cubic Pm-3n space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted body-centered cubic geometry to eight equivalent Ga(1) atoms. In the second Na site, Na(2) is bonded in a 8-coordinate geometry to eight equivalent Ge(2) atoms. Ga(1) is bonded in a 5-coordinate geometry to one Na(1), one Ga(1), and three equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a tetrahedral geometry to four equivalent Ge(2) atoms. In the second Ge site, Ge(2) is bonded in a 4-coordinate geometry to two equivalent Na(2), two equivalent Ga(1), one Ge(1), and one Ge(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na4Ga8Ge15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.857
_cell_length_b   10.857
_cell_length_c   10.857
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1279.903
_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  0.500  0.500  0.500  1.0
  Na  Na1  1  0.000  0.000  0.000  1.0
  Na  Na2  1  0.500  0.000  0.750  1.0
  Na  Na3  1  0.000  0.250  0.500  1.0
  Na  Na4  1  0.750  0.500  0.000  1.0
  Na  Na5  1  0.500  0.000  0.250  1.0
  Na  Na6  1  0.000  0.750  0.500  1.0
  Na  Na7  1  0.250  0.500  0.000  1.0
  Ga  Ga8  1  0.682  0.318  0.682  1.0
  Ga  Ga9  1  0.318  0.682  0.318  1.0
  Ga  Ga10  1  0.682  0.682  0.318  1.0
  Ga  Ga11  1  0.318  0.318  0.682  1.0
  Ga  Ga12  1  0.318  0.682  0.682  1.0
  Ga  Ga13  1  0.682  0.318  0.318  1.0
  Ga  Ga14  1  0.318  0.318  0.318  1.0
  Ga  Ga15  1  0.682  0.682  0.682  1.0
  Ga  Ga16  1  0.182  0.182  0.818  1.0
  Ga  Ga17  1  0.818  0.818  0.182  1.0
  Ga  Ga18  1  0.182  0.818  0.182  1.0
  Ga  Ga19  1  0.818  0.182  0.818  1.0
  Ga  Ga20  1  0.818  0.182  0.182  1.0
  Ga  Ga21  1  0.182  0.818  0.818  1.0
  Ga  Ga22  1  0.818  0.818  0.818  1.0
  Ga  Ga23  1  0.182  0.182  0.182  1.0
  Ge  Ge24  1  0.000  0.500  0.750  1.0
  Ge  Ge25  1  0.500  0.250  0.000  1.0
  Ge  Ge26  1  0.750  0.000  0.500  1.0
  Ge  Ge27  1  0.000  0.500  0.250  1.0
  Ge  Ge28  1  0.500  0.750  0.000  1.0
  Ge  Ge29  1  0.250  0.000  0.500  1.0
  Ge  Ge30  1  0.615  0.189  0.500  1.0
  Ge  Ge31  1  0.811  0.500  0.615  1.0
  Ge  Ge32  1  0.500  0.385  0.811  1.0
  Ge  Ge33  1  0.385  0.811  0.500  1.0
  Ge  Ge34  1  0.189  0.500  0.385  1.0
  Ge  Ge35  1  0.500  0.615  0.189  1.0
  Ge  Ge36  1  0.615  0.811  0.500  1.0
  Ge  Ge37  1  0.811  0.500  0.385  1.0
  Ge  Ge38  1  0.385  0.189  0.500  1.0
  Ge  Ge39  1  0.189  0.500  0.615  1.0
  Ge  Ge40  1  0.500  0.615  0.811  1.0
  Ge  Ge41  1  0.500  0.385  0.189  1.0
  Ge  Ge42  1  0.115  0.000  0.689  1.0
  Ge  Ge43  1  0.311  0.115  0.000  1.0
  Ge  Ge44  1  0.000  0.311  0.885  1.0
  Ge  Ge45  1  0.885  0.000  0.311  1.0
  Ge  Ge46  1  0.689  0.885  0.000  1.0
  Ge  Ge47  1  0.000  0.689  0.115  1.0
  Ge  Ge48  1  0.115  0.000  0.311  1.0
  Ge  Ge49  1  0.311  0.885  0.000  1.0
  Ge  Ge50  1  0.885  0.000  0.689  1.0
  Ge  Ge51  1  0.689  0.115  0.000  1.0
  Ge  Ge52  1  0.000  0.311  0.115  1.0
  Ge  Ge53  1  0.000  0.689  0.885  1.0
[/CIF]
.