data_NaB
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.5
_cell_length_b   5.5
_cell_length_c   5.39
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   160.84
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaB
_chemical_formula_sum   'Na2 B2'
_cell_volume   53.5
_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  Na2  1  0.92  0.65  0.04  1.0
  Na  Na3  1  0.92  0.35  0.35  1.0
  B  B0  1  0.92  0.94  0.04  1.0
  B  B1  1  0.92  0.06  0.35  1.0

data_NaB
_symmetry_space_group_name_H-M   P-1
_cell_length_a   1.83
_cell_length_b   5.39
_cell_length_c   5.5
_cell_angle_alpha   90.0
_cell_angle_beta   99.58
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   NaB
_chemical_formula_sum   'Na2 B2'
_cell_volume   53.5
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  2  0.35  0.35  0.35  1.0
  B  B1  2  0.06  0.35  0.06  1.0

Na Na B B
NaB crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two sodium;boron(1-) molecules. Na(1) is bonded in a single-bond geometry to one B(1) atom. The Na(1)-B(1) bond length is 1.55 Å. B(1) is bonded in a distorted single-bond geometry to one Na(1) atom.