data_Mn2BeHg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.76
_cell_length_b   4.76
_cell_length_c   4.76
_cell_angle_alpha   135.14
_cell_angle_beta   129.36
_cell_angle_gamma   69.93
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mn2BeHg
_chemical_formula_sum   'Mn2 Be1 Hg1'
_cell_volume   57.69
_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  0.82  0.0  0.83  1.0
  Mn  Mn3  1  0.0  0.04  0.07  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0
  Hg  Hg1  1  0.0  0.0  0.9  1.0

data_Mn2BeHg
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.63
_cell_length_b   4.07
_cell_length_c   4.76
_cell_angle_alpha   115.32
_cell_angle_beta   112.43
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mn2BeHg
_chemical_formula_sum   'Mn2 Be1 Hg1'
_cell_volume   57.69
_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  Mn0  1  0.93  0.97  0.97  1.0
  Mn  Mn1  1  0.98  0.17  0.98  1.0
  Be  Be2  1  0.0  0.0  0.0  1.0
  Hg  Hg3  1  0.1  0.1  0.1  1.0

Mn Mn Be Hg
BeMn2Hg crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one BeMn2Hg cluster. Be(1) is bonded in a bent 150 degrees geometry to one Mn(1), one Mn(2), and one Hg(1) atom. The Be(1)-Mn(1) bond length is 0.72 Å. The Be(1)-Mn(2) bond length is 0.23 Å. The Be(1)-Hg(1) bond length is 0.47 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 2-coordinate geometry to one Be(1) and one Hg(1) atom. The Mn(1)-Hg(1) bond length is 0.72 Å. In the second Mn site, Mn(2) is bonded in a single-bond geometry to one Be(1) atom. Hg(1) is bonded in a distorted single-bond geometry to one Be(1) and one Mn(1) atom.