The compound described by NaSi crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to two equivalent Si(1) and three equivalent Si(2) atoms. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to three equivalent Si(1) and three equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to two equivalent Na(1), three equivalent Na(2), one Si(1), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to three equivalent Na(1), three equivalent Na(2), one Si(2), and two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.553
_cell_length_b   6.883
_cell_length_c   10.183
_cell_angle_alpha   77.698
_cell_angle_beta   71.231
_cell_angle_gamma   61.575
_symmetry_Int_Tables_number   1
_cell_volume   381.463
_cell_formula_units_Z   8
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  0.724  0.193  0.547  1.0
  Na  Na1  1  0.464  0.307  0.953  1.0
  Na  Na2  1  0.276  0.807  0.453  1.0
  Na  Na3  1  0.536  0.693  0.047  1.0
  Na  Na4  1  0.992  0.843  0.857  1.0
  Na  Na5  1  0.692  0.657  0.643  1.0
  Na  Na6  1  0.008  0.157  0.143  1.0
  Na  Na7  1  0.308  0.343  0.357  1.0
  Si  Si8  1  0.937  0.338  0.858  1.0
  Si  Si9  1  0.134  0.162  0.642  1.0
  Si  Si10  1  0.063  0.662  0.142  1.0
  Si  Si11  1  0.866  0.838  0.358  1.0
  Si  Si12  1  0.228  0.434  0.687  1.0
  Si  Si13  1  0.349  0.066  0.813  1.0
  Si  Si14  1  0.772  0.566  0.313  1.0
  Si  Si15  1  0.651  0.934  0.187  1.0
[/CIF]
.
The compound described by NaSi crystallizes in the monoclinic C2/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to two equivalent Si(1) and three equivalent Si(2) atoms. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to three equivalent Si(1) and three equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to two equivalent Na(1), three equivalent Na(2), one Si(1), and two equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to three equivalent Na(1), three equivalent Na(2), one Si(2), and two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.553
_cell_length_b   6.883
_cell_length_c   10.183
_cell_angle_alpha   77.698
_cell_angle_beta   71.231
_cell_angle_gamma   61.575
_symmetry_Int_Tables_number   1
_cell_volume   381.463
_cell_formula_units_Z   8
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  0.724  0.193  0.547  1.0
  Na  Na1  1  0.464  0.307  0.953  1.0
  Na  Na2  1  0.276  0.807  0.453  1.0
  Na  Na3  1  0.536  0.693  0.047  1.0
  Na  Na4  1  0.992  0.843  0.857  1.0
  Na  Na5  1  0.692  0.657  0.643  1.0
  Na  Na6  1  0.008  0.157  0.143  1.0
  Na  Na7  1  0.308  0.343  0.357  1.0
  Si  Si8  1  0.937  0.338  0.858  1.0
  Si  Si9  1  0.134  0.162  0.642  1.0
  Si  Si10  1  0.063  0.662  0.142  1.0
  Si  Si11  1  0.866  0.838  0.358  1.0
  Si  Si12  1  0.228  0.434  0.687  1.0
  Si  Si13  1  0.349  0.066  0.813  1.0
  Si  Si14  1  0.772  0.566  0.313  1.0
  Si  Si15  1  0.651  0.934  0.187  1.0
[/CIF]
.