data_Na2InAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.6
_cell_length_b   5.6
_cell_length_c   5.6
_cell_angle_alpha   131.0
_cell_angle_beta   131.0
_cell_angle_gamma   71.81
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2InAs
_chemical_formula_sum   'Na2 In1 As1'
_cell_volume   97.63
_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  0.32  0.27  1.0
  Na  Na3  1  0.32  0.0  0.27  1.0
  In  In1  1  0.0  0.0  0.53  1.0
  As  As0  1  0.0  0.0  0.0  1.0

data_Na2InAs
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.56
_cell_length_b   6.56
_cell_length_c   5.6
_cell_angle_alpha   90.0
_cell_angle_beta   125.9
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Na2InAs
_chemical_formula_sum   'Na4 In2 As2'
_cell_volume   195.25
_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  4  0.39  0.34  0.05  1.0
  In  In1  2  0.47  0.0  0.47  1.0
  As  As2  2  0.0  0.0  0.0  1.0

Na Na In As
Na Na In As 0 3 o o o 0 2 o o o 0 2 o o - 0 2 o + o 1 3 o o o 1 2 + o o 1 2 o o o 1 2 o o - 2 3 o o o 2 3 o o + 
Na2InAs crystallizes in the monoclinic Cm space group. Na(1) is bonded in a single-bond geometry to three equivalent In(1) and one As(1) atom. There are a spread of Na(1)-In(1) bond distances ranging from 2.99-3.23 Å. The Na(1)-As(1) bond length is 1.39 Å. In(1) is bonded in a 8-coordinate geometry to six equivalent Na(1) and two equivalent As(1) atoms. There is one shorter (2.62 Å) and one longer (2.98 Å) In(1)-As(1) bond length. As(1) is bonded in a water-like geometry to two equivalent Na(1) and two equivalent In(1) atoms.