data_TcO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.48
_cell_length_b   4.75
_cell_length_c   5.52
_cell_angle_alpha   90.0
_cell_angle_beta   117.73
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TcO2
_chemical_formula_sum   'Tc4 O8'
_cell_volume   127.36
_cell_formula_units_Z   4
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
  Tc  Tc4  1  0.72  0.03  0.36  1.0
  Tc  Tc5  1  0.47  0.41  0.09  1.0
  Tc  Tc6  1  0.19  0.72  0.53  1.0
  Tc  Tc7  1  0.44  0.34  0.8  1.0
  O  O0  1  0.52  0.48  1.0  1.0
  O  O1  1  0.68  0.86  0.45  1.0
  O  O2  1  0.4  0.27  0.89  1.0
  O  O3  1  0.24  0.9  0.44  1.0
  O  O8  1  0.36  0.99  0.85  1.0
  O  O9  1  0.84  0.37  0.59  1.0
  O  O10  1  0.55  0.76  0.04  1.0
  O  O11  1  0.08  0.39  0.29  1.0

data_TcO2
_symmetry_space_group_name_H-M   P-1
_cell_length_a   4.75
_cell_length_b   5.48
_cell_length_c   5.52
_cell_angle_alpha   117.73
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   TcO2
_chemical_formula_sum   'Tc4 O8'
_cell_volume   127.36
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Tc  Tc0  2  0.16  0.77  0.41  1.0
  Tc  Tc1  2  0.47  0.48  0.86  1.0
  O  O2  2  0.02  0.28  0.5  1.0
  O  O3  2  0.11  0.4  0.91  1.0
  O  O4  2  0.4  0.44  0.95  1.0
  O  O5  2  0.49  0.88  0.65  1.0

Tc Tc Tc Tc O O O O O O O O
TcO2 is Hg_xSn structured and crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of one TcO2 cluster. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded in a distorted single-bond geometry to one O(2), one O(3), and one O(4) atom. The Tc(1)-O(2) bond length is 1.05 Å. The Tc(1)-O(3) bond length is 2.03 Å. The Tc(1)-O(4) bond length is 1.96 Å. In the second Tc site, Tc(2) is bonded in a distorted single-bond geometry to one O(1) atom. The Tc(2)-O(1) bond length is 0.72 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Tc(2) and one O(3) atom. The O(1)-O(3) bond length is 1.35 Å. In the second O site, O(2) is bonded in a single-bond geometry to one Tc(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Tc(1), one O(1), and one O(3) atom. The O(3)-O(3) bond length is 1.53 Å. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Tc(1) atom.