data_MnBeSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.07
_cell_length_b   3.07
_cell_length_c   4.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MnBeSi2
_chemical_formula_sum   'Mn1 Be1 Si2'
_cell_volume   44.3
_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  0.54  0.54  0.56  1.0
  Be  Be0  1  0.0  0.0  0.32  1.0
  Si  Si2  1  0.0  0.0  0.61  1.0
  Si  Si3  1  0.54  0.54  0.25  1.0

data_MnBeSi2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.34
_cell_length_b   4.34
_cell_length_c   4.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MnBeSi2
_chemical_formula_sum   'Mn2 Be2 Si4'
_cell_volume   88.6
_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  0.04  0.5  0.56  1.0
  Be  Be1  2  0.0  0.0  0.32  1.0
  Si  Si2  2  0.0  0.0  0.61  1.0
  Si  Si3  2  0.04  0.5  0.25  1.0

Mn Be Si Si
Mn Be Si Si 0 3 o o o 1 2 o o o 
BeSiMnSi is alpha Niobium phosphide-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two manganese silicide (mnsi) molecules and two BeSi clusters. In each BeSi cluster, Be(1) is bonded in a distorted single-bond geometry to one Si(1) atom. The Be(1)-Si(1) bond length is 1.39 Å. Si(1) is bonded in a distorted single-bond geometry to one Be(1) atom.