data_NaTc2Hg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.56
_cell_length_b   5.56
_cell_length_c   2.69
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   123.52
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaTc2Hg
_chemical_formula_sum   'Na1 Tc2 Hg1'
_cell_volume   69.3
_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
  Na  Na1  1  0.0  0.0  0.0  1.0
  Tc  Tc2  1  0.32  0.45  0.34  1.0
  Tc  Tc3  1  0.32  0.55  0.34  1.0
  Hg  Hg0  1  0.63  0.0  0.0  1.0

data_NaTc2Hg
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.69
_cell_length_b   5.26
_cell_length_c   5.56
_cell_angle_alpha   118.24
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaTc2Hg
_chemical_formula_sum   'Na1 Tc2 Hg1'
_cell_volume   69.3
_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
  Na  Na0  1  0.0  0.0  0.0  1.0
  Tc  Tc1  1  0.34  0.45  0.77  1.0
  Tc  Tc2  1  0.34  0.55  0.87  1.0
  Hg  Hg3  1  -0.0  0.0  0.63  1.0

Na Tc Tc Hg
NaTc2Hg crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one NaTc2Hg cluster. Na(1) is bonded in a 2-coordinate geometry to one Tc(1) and one Hg(1) atom. The Na(1)-Tc(1) bond length is 2.31 Å. The Na(1)-Hg(1) bond length is 2.05 Å. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded in a 2-coordinate geometry to one Na(1) and one Tc(2) atom. The Tc(1)-Tc(2) bond length is 0.55 Å. In the second Tc site, Tc(2) is bonded in a distorted single-bond geometry to one Tc(1) atom. Hg(1) is bonded in a distorted single-bond geometry to one Na(1) atom.