data_MnBeNi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.75
_cell_length_b   4.75
_cell_length_c   4.75
_cell_angle_alpha   147.64
_cell_angle_beta   147.64
_cell_angle_gamma   46.42
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MnBeNi
_chemical_formula_sum   'Mn1 Be1 Ni1'
_cell_volume   30.64
_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
  Mn  Mn1  1  0.0  0.0  0.98  1.0
  Be  Be0  1  0.0  0.0  0.08  1.0
  Ni  Ni2  1  0.0  0.0  0.68  1.0

data_MnBeNi
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.75
_cell_length_b   3.75
_cell_length_c   4.75
_cell_angle_alpha   90.0
_cell_angle_beta   113.21
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MnBeNi
_chemical_formula_sum   'Mn2 Be2 Ni2'
_cell_volume   61.28
_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
  Mn  Mn0  2  0.0  0.0  0.02  1.0
  Be  Be1  2  0.0  0.0  0.92  1.0
  Ni  Ni2  2  0.0  0.0  0.32  1.0

Mn Be Ni
Mn Be Ni 0 1 o o + 0 2 o o o 
BeMnNi is Cyanogen Chloride-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two BeMnNi clusters. Be(1) is bonded in a single-bond geometry to one Mn(1) atom. The Be(1)-Mn(1) bond length is 0.50 Å. Mn(1) is bonded in a linear geometry to one Be(1) and one Ni(1) atom. The Mn(1)-Ni(1) bond length is 1.41 Å. Ni(1) is bonded in a single-bond geometry to one Mn(1) atom.