data_MgZnTc2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.29
_cell_length_b   3.29
_cell_length_c   5.93
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgZnTc2
_chemical_formula_sum   'Mg1 Zn1 Tc2'
_cell_volume   64.13
_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
  Mg  Mg0  1  0.0  0.0  0.0  1.0
  Zn  Zn3  1  0.0  0.0  0.97  1.0
  Tc  Tc1  1  0.64  0.64  0.79  1.0
  Tc  Tc2  1  0.64  0.64  0.14  1.0

data_MgZnTc2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.65
_cell_length_b   4.65
_cell_length_c   5.93
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgZnTc2
_chemical_formula_sum   'Mg2 Zn2 Tc4'
_cell_volume   128.26
_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
  Mg  Mg0  2  0.0  0.0  0.0  1.0
  Zn  Zn1  2  0.0  0.0  0.97  1.0
  Tc  Tc2  2  0.14  0.5  0.14  1.0
  Tc  Tc3  2  0.14  0.5  0.79  1.0

Mg Zn Tc Tc
Mg Zn Tc Tc 0 1 o o - 0 2 - - - 0 3 - - o 1 2 - - o 1 3 - - + 2 3 o o + 
MgTc2Zn crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two MgTc2Zn clusters. Mg(1) is bonded in a single-bond geometry to one Tc(2) and one Zn(1) atom. The Mg(1)-Tc(2) bond length is 1.85 Å. The Mg(1)-Zn(1) bond length is 0.20 Å. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded in a 1-coordinate geometry to one Zn(1) atom. The Tc(1)-Zn(1) bond length is 1.95 Å. In the second Tc site, Tc(2) is bonded in a 1-coordinate geometry to one Mg(1) atom. Zn(1) is bonded in a single-bond geometry to one Mg(1) and one Tc(1) atom.