data_Be4Ru
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.21
_cell_length_b   4.21
_cell_length_c   4.21
_cell_angle_alpha   97.58
_cell_angle_beta   97.58
_cell_angle_gamma   137.42
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Be4Ru
_chemical_formula_sum   'Be4 Ru1'
_cell_volume   46.92
_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
  Be  Be0  1  0.19  0.11  0.0  1.0
  Be  Be1  1  0.11  0.35  0.0  1.0
  Be  Be2  1  0.58  0.66  0.53  1.0
  Be  Be3  1  0.66  0.42  0.53  1.0
  Ru  Ru4  1  0.0  0.0  0.0  1.0

data_Be4Ru
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.05
_cell_length_b   4.21
_cell_length_c   4.21
_cell_angle_alpha   82.42
_cell_angle_beta   68.71
_cell_angle_gamma   68.71
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Be4Ru
_chemical_formula_sum   'Be4 Ru1'
_cell_volume   46.92
_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
  Be  Be0  1  0.11  -0.0  0.08  1.0
  Be  Be1  1  0.13  0.53  0.92  1.0
  Be  Be2  1  0.35  -0.0  0.76  1.0
  Be  Be3  1  0.89  0.53  0.24  1.0
  Ru  Ru4  1  0.0  0.0  0.0  1.0

Be Be Be Be Ru
Be Be Be Be Ru 0 4 o o o 0 1 o o o 1 4 o o o 2 3 o o o 
Be4Ru is Indium-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Be4Ru cluster. There are four inequivalent Be sites. In the first Be site, Be(1) is bonded in a single-bond geometry to one Ru(1) atom. The Be(1)-Ru(1) bond length is 0.55 Å. In the second Be site, Be(2) is bonded in a single-bond geometry to one Ru(1) atom. The Be(2)-Ru(1) bond length is 1.19 Å. In the third Be site, Be(3) is bonded in a distorted L-shaped geometry to one Be(4) and one Ru(1) atom. The Be(3)-Be(4) bond length is 1.28 Å. The Be(3)-Ru(1) bond length is 1.93 Å. In the fourth Be site, Be(4) is bonded in a distorted single-bond geometry to one Be(3) atom. Ru(1) is bonded in a distorted single-bond geometry to one Be(1), one Be(2), and one Be(3) atom.