data_Na(LaSi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.92
_cell_length_b   6.92
_cell_length_c   6.92
_cell_angle_alpha   133.46
_cell_angle_beta   133.46
_cell_angle_gamma   67.93
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na(LaSi)2
_chemical_formula_sum   'Na1 La2 Si2'
_cell_volume   171.55
_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  Na2  1  0.0  0.0  0.0  1.0
  La  La0  1  0.0  0.0  0.64  1.0
  La  La1  1  0.0  0.0  0.84  1.0
  Si  Si3  1  0.0  0.73  0.87  1.0
  Si  Si4  1  0.73  0.0  0.87  1.0

data_Na(LaSi)2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.73
_cell_length_b   7.73
_cell_length_c   6.92
_cell_angle_alpha   90.0
_cell_angle_beta   123.97
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Na(LaSi)2
_chemical_formula_sum   'Na2 La4 Si4'
_cell_volume   343.11
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.0  0.0  0.0  1.0
  La  La1  2  0.16  0.0  0.16  1.0
  La  La2  2  0.36  0.0  0.36  1.0
  Si  Si3  4  0.5  0.37  0.86  1.0

Na La La Si Si
Na(LaSi)2 is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Na(LaSi)2 clusters. Na(1) is bonded in a trigonal non-coplanar geometry to one La(2) and two equivalent Si(1) atoms. The Na(1)-La(2) bond length is 1.11 Å. Both Na(1)-Si(1) bond lengths are 1.39 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded in a single-bond geometry to one La(2) atom. The La(1)-La(2) bond length is 1.39 Å. In the second La site, La(2) is bonded in a distorted single-bond geometry to one Na(1) and one La(1) atom. Si(1) is bonded in a single-bond geometry to one Na(1) atom.