The crystal structure described by CsNa2Si17 crystallizes in the cubic Fd-3m space group. Cs(1) is bonded in a 12-coordinate geometry to four equivalent Si(2) and twenty-four equivalent Si(1) atoms. Na(1) is bonded in a 20-coordinate geometry to two equivalent Si(3), six equivalent Si(2), and twelve equivalent Si(1) atoms. There are three inequivalent Si sites. In the first Si site, Si(2) is bonded in a 7-coordinate geometry to one Cs(1), three equivalent Na(1), one Si(3), and three equivalent Si(1) atoms. In the second Si site, Si(3) is bonded in a body-centered cubic geometry to four equivalent Na(1) and four equivalent Si(2) atoms. In the third Si site, Si(1) is bonded in a 4-coordinate geometry to two equivalent Cs(1), two equivalent Na(1), one Si(2), and three equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_CsNa2Si17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.493
_cell_length_b   10.493
_cell_length_c   10.493
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   816.858
_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
  Cs  Cs0  1  0.000  0.000  0.000  1.0
  Cs  Cs1  1  0.250  0.250  0.250  1.0
  Na  Na2  1  0.625  0.625  0.625  1.0
  Na  Na3  1  0.125  0.625  0.625  1.0
  Na  Na4  1  0.625  0.625  0.125  1.0
  Na  Na5  1  0.625  0.125  0.625  1.0
  Si  Si6  1  0.995  0.995  0.619  1.0
  Si  Si7  1  0.995  0.390  0.995  1.0
  Si  Si8  1  0.390  0.995  0.619  1.0
  Si  Si9  1  0.390  0.995  0.995  1.0
  Si  Si10  1  0.619  0.995  0.995  1.0
  Si  Si11  1  0.860  0.631  0.255  1.0
  Si  Si12  1  0.255  0.631  0.255  1.0
  Si  Si13  1  0.631  0.255  0.860  1.0
  Si  Si14  1  0.255  0.255  0.860  1.0
  Si  Si15  1  0.631  0.860  0.255  1.0
  Si  Si16  1  0.860  0.255  0.631  1.0
  Si  Si17  1  0.255  0.255  0.631  1.0
  Si  Si18  1  0.255  0.860  0.255  1.0
  Si  Si19  1  0.619  0.995  0.390  1.0
  Si  Si20  1  0.619  0.390  0.995  1.0
  Si  Si21  1  0.995  0.390  0.619  1.0
  Si  Si22  1  0.995  0.619  0.390  1.0
  Si  Si23  1  0.390  0.619  0.995  1.0
  Si  Si24  1  0.995  0.619  0.995  1.0
  Si  Si25  1  0.860  0.255  0.255  1.0
  Si  Si26  1  0.631  0.255  0.255  1.0
  Si  Si27  1  0.255  0.860  0.631  1.0
  Si  Si28  1  0.408  0.777  0.408  1.0
  Si  Si29  1  0.842  0.842  0.473  1.0
  Si  Si30  1  0.473  0.842  0.842  1.0
  Si  Si31  1  0.842  0.842  0.842  1.0
  Si  Si32  1  0.777  0.408  0.408  1.0
  Si  Si33  1  0.408  0.408  0.408  1.0
  Si  Si34  1  0.408  0.408  0.777  1.0
  Si  Si35  1  0.842  0.473  0.842  1.0
  Si  Si36  1  0.500  0.500  0.500  1.0
  Si  Si37  1  0.750  0.750  0.750  1.0
  Si  Si38  1  0.995  0.995  0.390  1.0
  Si  Si39  1  0.255  0.631  0.860  1.0
[/CIF]
.
The crystal structure described by CsNa2Si17 crystallizes in the cubic Fd-3m space group. Cs(1) is bonded in a 12-coordinate geometry to four equivalent Si(2) and twenty-four equivalent Si(1) atoms. Na(1) is bonded in a 20-coordinate geometry to two equivalent Si(3), six equivalent Si(2), and twelve equivalent Si(1) atoms. There are three inequivalent Si sites. In the first Si site, Si(2) is bonded in a 7-coordinate geometry to one Cs(1), three equivalent Na(1), one Si(3), and three equivalent Si(1) atoms. In the second Si site, Si(3) is bonded in a body-centered cubic geometry to four equivalent Na(1) and four equivalent Si(2) atoms. In the third Si site, Si(1) is bonded in a 4-coordinate geometry to two equivalent Cs(1), two equivalent Na(1), one Si(2), and three equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_CsNa2Si17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.493
_cell_length_b   10.493
_cell_length_c   10.493
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   816.858
_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
  Cs  Cs0  1  0.000  0.000  0.000  1.0
  Cs  Cs1  1  0.250  0.250  0.250  1.0
  Na  Na2  1  0.625  0.625  0.625  1.0
  Na  Na3  1  0.125  0.625  0.625  1.0
  Na  Na4  1  0.625  0.625  0.125  1.0
  Na  Na5  1  0.625  0.125  0.625  1.0
  Si  Si6  1  0.995  0.995  0.619  1.0
  Si  Si7  1  0.995  0.390  0.995  1.0
  Si  Si8  1  0.390  0.995  0.619  1.0
  Si  Si9  1  0.390  0.995  0.995  1.0
  Si  Si10  1  0.619  0.995  0.995  1.0
  Si  Si11  1  0.860  0.631  0.255  1.0
  Si  Si12  1  0.255  0.631  0.255  1.0
  Si  Si13  1  0.631  0.255  0.860  1.0
  Si  Si14  1  0.255  0.255  0.860  1.0
  Si  Si15  1  0.631  0.860  0.255  1.0
  Si  Si16  1  0.860  0.255  0.631  1.0
  Si  Si17  1  0.255  0.255  0.631  1.0
  Si  Si18  1  0.255  0.860  0.255  1.0
  Si  Si19  1  0.619  0.995  0.390  1.0
  Si  Si20  1  0.619  0.390  0.995  1.0
  Si  Si21  1  0.995  0.390  0.619  1.0
  Si  Si22  1  0.995  0.619  0.390  1.0
  Si  Si23  1  0.390  0.619  0.995  1.0
  Si  Si24  1  0.995  0.619  0.995  1.0
  Si  Si25  1  0.860  0.255  0.255  1.0
  Si  Si26  1  0.631  0.255  0.255  1.0
  Si  Si27  1  0.255  0.860  0.631  1.0
  Si  Si28  1  0.408  0.777  0.408  1.0
  Si  Si29  1  0.842  0.842  0.473  1.0
  Si  Si30  1  0.473  0.842  0.842  1.0
  Si  Si31  1  0.842  0.842  0.842  1.0
  Si  Si32  1  0.777  0.408  0.408  1.0
  Si  Si33  1  0.408  0.408  0.408  1.0
  Si  Si34  1  0.408  0.408  0.777  1.0
  Si  Si35  1  0.842  0.473  0.842  1.0
  Si  Si36  1  0.500  0.500  0.500  1.0
  Si  Si37  1  0.750  0.750  0.750  1.0
  Si  Si38  1  0.995  0.995  0.390  1.0
  Si  Si39  1  0.255  0.631  0.860  1.0
[/CIF]
.