data_Mn2BeGe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.95
_cell_length_b   7.95
_cell_length_c   7.95
_cell_angle_alpha   20.12
_cell_angle_beta   20.12
_cell_angle_gamma   20.12
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mn2BeGe
_chemical_formula_sum   'Mn2 Be1 Ge1'
_cell_volume   51.99
_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  Mn2  1  0.0  0.0  0.32  1.0
  Mn  Mn3  1  0.0  0.0  0.03  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0
  Ge  Ge1  1  0.0  0.0  0.68  1.0

data_Mn2BeGe
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.81
_cell_length_b   2.78
_cell_length_c   7.95
_cell_angle_alpha   90.0
_cell_angle_beta   101.64
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mn2BeGe
_chemical_formula_sum   'Mn4 Be2 Ge2'
_cell_volume   103.98
_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  0.68  1.0
  Mn  Mn1  2  -0.0  0.0  0.97  1.0
  Be  Be2  2  0.0  0.0  0.0  1.0
  Ge  Ge3  2  -0.0  0.0  0.32  1.0

Mn Mn Be Ge
BeMn2Ge crystallizes in the monoclinic Cm space group. Be(1) is bonded in a single-bond geometry to one Mn(2) and one Ge(1) atom. The Be(1)-Mn(2) bond length is 0.27 Å. The Be(1)-Ge(1) bond length is 2.57 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 8-coordinate geometry to one Mn(2), six equivalent Mn(1), and one Ge(1) atom. The Mn(1)-Mn(2) bond length is 2.25 Å. All Mn(1)-Mn(1) bond lengths are 2.78 Å. The Mn(1)-Ge(1) bond length is 2.85 Å. In the second Mn site, Mn(2) is bonded in a single-bond geometry to one Be(1) and one Mn(1) atom. Ge(1) is bonded in a distorted linear geometry to one Be(1) and one Mn(1) atom.