data_Li2MnBe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.39
_cell_length_b   3.39
_cell_length_c   4.34
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Li2MnBe
_chemical_formula_sum   'Li2 Mn1 Be1'
_cell_volume   49.78
_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
  Li  Li1  1  0.0  0.69  0.17  1.0
  Li  Li2  1  0.69  0.0  0.17  1.0
  Mn  Mn3  1  0.69  0.69  0.0  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0

data_Li2MnBe
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.79
_cell_length_b   4.79
_cell_length_c   4.34
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Li2MnBe
_chemical_formula_sum   'Li4 Mn2 Be2'
_cell_volume   99.56
_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
  Li  Li0  4  0.35  0.35  0.17  1.0
  Mn  Mn1  2  0.19  0.5  0.0  1.0
  Be  Be2  2  0.0  0.0  0.0  1.0

Li Li Mn Be
Li2BeMn is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Li2BeMn clusters. Li(1) is bonded in a 2-coordinate geometry to one Be(1) and one Mn(1) atom. The Li(1)-Be(1) bond length is 1.28 Å. The Li(1)-Mn(1) bond length is 1.28 Å. Be(1) is bonded in a 2-coordinate geometry to two equivalent Li(1) atoms. Mn(1) is bonded in a 2-coordinate geometry to two equivalent Li(1) atoms.