data_BeCl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.49
_cell_length_b   4.49
_cell_length_c   3.04
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeCl
_chemical_formula_sum   'Be2 Cl2'
_cell_volume   61.21
_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
  Be  Be0  1  0.24  0.0  1.0  1.0
  Be  Be1  1  0.0  0.24  0.04  1.0
  Cl  Cl2  1  0.24  0.24  0.0  1.0
  Cl  Cl3  1  0.0  0.0  0.0  1.0

data_BeCl
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.35
_cell_length_b   6.35
_cell_length_c   3.04
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BeCl
_chemical_formula_sum   'Be4 Cl4'
_cell_volume   122.43
_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+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
  Be  Be0  2  0.0  0.0  0.04  1.0
  Be  Be1  2  0.24  0.0  1.0  1.0
  Cl  Cl2  4  0.12  0.12  0.0  1.0

Be Be Cl Cl
BeCl is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two BeCl clusters. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded in an L-shaped geometry to two equivalent Cl(1) atoms. Both Be(1)-Cl(1) bond lengths are 1.10 Å. In the second Be site, Be(2) is bonded in an L-shaped geometry to two equivalent Cl(1) atoms. Both Be(2)-Cl(1) bond lengths are 1.10 Å. Cl(1) is bonded in an L-shaped geometry to one Be(1) and one Be(2) atom.