data_YBe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.42
_cell_length_b   7.42
_cell_length_c   7.42
_cell_angle_alpha   29.33
_cell_angle_beta   29.33
_cell_angle_gamma   29.33
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YBe
_chemical_formula_sum   'Y2 Be2'
_cell_volume   86.8
_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
  Y  Y2  1  0.0  0.0  0.96  1.0
  Y  Y3  1  0.0  0.0  0.33  1.0
  Be  Be0  1  0.0  0.0  0.05  1.0
  Be  Be1  1  0.0  0.0  0.24  1.0

data_YBe
_symmetry_space_group_name_H-M   C2/m
_cell_length_a   6.51
_cell_length_b   3.76
_cell_length_c   7.42
_cell_angle_alpha   90.0
_cell_angle_beta   107.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   12
_chemical_formula_structural   YBe
_chemical_formula_sum   'Y4 Be4'
_cell_volume   173.6
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-x, -y, -z'
  3  '-x, y, -z'
  4  'x, -y, z'
  5  'x+1/2, y+1/2, z'
  6  '-x+1/2, -y+1/2, -z'
  7  '-x+1/2, y+1/2, -z'
  8  '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
  Y  Y0  4  -0.0  0.0  0.31  1.0
  Be  Be1  4  -0.0  0.0  0.4  1.0

Y Y Be Be
BeY crystallizes in the monoclinic C2/m space group. The structure is zero-dimensional and consists of four BeY clusters. Be(1) is bonded in a distorted single-bond geometry to one Y(1) atom. The Be(1)-Y(1) bond length is 0.67 Å. Y(1) is bonded in a single-bond geometry to one Be(1) atom.