data_Na2YBe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.36
_cell_length_b   6.36
_cell_length_c   3.12
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   122.3
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2YBe
_chemical_formula_sum   'Na2 Y1 Be1'
_cell_volume   106.37
_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  0.53  0.78  0.56  1.0
  Na  Na2  1  0.53  0.22  0.56  1.0
  Y  Y3  1  0.07  0.0  0.0  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0

data_Na2YBe
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.12
_cell_length_b   6.13
_cell_length_c   6.36
_cell_angle_alpha   118.85
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2YBe
_chemical_formula_sum   'Na2 Y1 Be1'
_cell_volume   106.37
_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  Na0  1  0.56  0.22  0.75  1.0
  Na  Na1  1  0.56  0.78  0.32  1.0
  Y  Y2  1  -0.0  0.0  0.07  1.0
  Be  Be3  1  0.0  0.0  0.0  1.0

Na Na Y Be
Na2BeY crystallizes in the triclinic P1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 2-coordinate geometry to two equivalent Na(2) and two equivalent Be(1) atoms. There is one shorter (2.75 Å) and one longer (3.60 Å) Na(1)-Na(2) bond length. There is one shorter (2.87 Å) and one longer (3.06 Å) Na(1)-Be(1) bond length. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and two equivalent Y(1) atoms. Both Na(2)-Na(2) bond lengths are 3.12 Å. There is one shorter (2.87 Å) and one longer (3.06 Å) Na(2)-Y(1) bond length. Be(1) is bonded in a single-bond geometry to two equivalent Na(1) and one Y(1) atom. The Be(1)-Y(1) bond length is 0.43 Å. Y(1) is bonded in a single-bond geometry to two equivalent Na(2) and one Be(1) atom.