data_Cu2SnHg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.33
_cell_length_b   4.33
_cell_length_c   3.8
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cu2SnHg
_chemical_formula_sum   'Cu2 Sn1 Hg1'
_cell_volume   71.26
_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
  Cu  Cu0  1  0.0  0.16  0.9  1.0
  Cu  Cu1  1  0.16  0.0  0.9  1.0
  Sn  Sn3  1  0.0  0.0  0.0  1.0
  Hg  Hg2  1  0.16  0.16  0.0  1.0

data_Cu2SnHg
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.12
_cell_length_b   6.12
_cell_length_c   3.8
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Cu2SnHg
_chemical_formula_sum   'Cu4 Sn2 Hg2'
_cell_volume   142.53
_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
  Cu  Cu0  4  0.08  0.08  0.9  1.0
  Sn  Sn1  2  0.0  0.0  0.0  1.0
  Hg  Hg2  2  0.16  0.0  0.0  1.0

Cu Cu Sn Hg
Cu Cu Sn Hg 0 2 o o + 0 3 o o + 1 2 o o + 1 3 o o + 
Cu2HgSn is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Cu2HgSn clusters. Cu(1) is bonded in a 2-coordinate geometry to one Hg(1) and one Sn(1) atom. The Cu(1)-Hg(1) bond length is 0.80 Å. The Cu(1)-Sn(1) bond length is 0.80 Å. Hg(1) is bonded in a 2-coordinate geometry to two equivalent Cu(1) and one Sn(1) atom. The Hg(1)-Sn(1) bond length is 1.00 Å. Sn(1) is bonded in a 3-coordinate geometry to two equivalent Cu(1) and one Hg(1) atom.