data_Mg2BeCd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.38
_cell_length_b   9.38
_cell_length_c   9.38
_cell_angle_alpha   18.99
_cell_angle_beta   18.99
_cell_angle_gamma   18.99
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2BeCd
_chemical_formula_sum   'Mg2 Be1 Cd1'
_cell_volume   76.32
_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
  Mg  Mg2  1  0.0  0.0  0.58  1.0
  Mg  Mg3  1  0.0  0.0  0.02  1.0
  Be  Be0  1  0.0  0.0  0.84  1.0
  Cd  Cd1  1  0.0  0.0  0.61  1.0

data_Mg2BeCd
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.36
_cell_length_b   3.09
_cell_length_c   9.38
_cell_angle_alpha   90.0
_cell_angle_beta   100.98
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mg2BeCd
_chemical_formula_sum   'Mg4 Be2 Cd2'
_cell_volume   152.64
_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
  Mg  Mg0  2  -0.0  0.0  0.42  1.0
  Mg  Mg1  2  -0.0  0.0  0.98  1.0
  Be  Be2  2  -0.0  0.0  0.16  1.0
  Cd  Cd3  2  -0.0  0.0  0.39  1.0

Mg Mg Be Cd
Mg2BeCd crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Mg2BeCd clusters. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a single-bond geometry to one Cd(1) atom. The Mg(1)-Cd(1) bond length is 0.25 Å. In the second Mg site, Mg(2) is bonded in a single-bond geometry to one Be(1) atom. The Mg(2)-Be(1) bond length is 1.66 Å. Be(1) is bonded in a linear geometry to one Mg(2) and one Cd(1) atom. The Be(1)-Cd(1) bond length is 2.20 Å. Cd(1) is bonded in a single-bond geometry to one Mg(1) and one Be(1) atom.