data_Na2BeTe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.49
_cell_length_b   4.49
_cell_length_c   4.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2BeTe
_chemical_formula_sum   'Na2 Be1 Te1'
_cell_volume   90.05
_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  Na1  1  0.0  0.25  0.23  1.0
  Na  Na2  1  0.25  0.0  0.23  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0
  Te  Te3  1  0.25  0.25  0.0  1.0

data_Na2BeTe
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.35
_cell_length_b   6.35
_cell_length_c   4.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Na2BeTe
_chemical_formula_sum   'Na4 Be2 Te2'
_cell_volume   180.09
_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  0.12  0.12  0.23  1.0
  Be  Be1  2  0.0  0.0  0.0  1.0
  Te  Te2  2  0.25  0.0  0.0  1.0

Na Na Be Te
Na Na Be Te 0 2 o o o 0 1 o o o 0 3 o o o 1 2 o o o 1 3 o o o 2 3 o o o 
Na2BeTe is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Na2BeTe clusters. Na(1) is bonded in a 2-coordinate geometry to one Be(1) and one Te(1) atom. The Na(1)-Be(1) bond length is 1.51 Å. The Na(1)-Te(1) bond length is 1.51 Å. Be(1) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one Te(1) atom. The Be(1)-Te(1) bond length is 1.57 Å. Te(1) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one Be(1) atom.