data_Zr2TiTc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.29
_cell_length_b   3.29
_cell_length_c   7.07
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Zr2TiTc
_chemical_formula_sum   'Zr2 Ti1 Tc1'
_cell_volume   76.55
_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
  Zr  Zr2  1  0.64  0.64  0.93  1.0
  Zr  Zr3  1  0.64  0.64  0.15  1.0
  Ti  Ti1  1  0.0  0.0  0.0  1.0
  Tc  Tc0  1  0.0  0.0  0.54  1.0

data_Zr2TiTc
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.65
_cell_length_b   4.65
_cell_length_c   7.07
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Zr2TiTc
_chemical_formula_sum   'Zr4 Ti2 Tc2'
_cell_volume   153.11
_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
  Zr  Zr0  2  0.14  0.5  0.15  1.0
  Zr  Zr1  2  0.14  0.5  0.93  1.0
  Ti  Ti2  2  0.0  0.0  0.0  1.0
  Tc  Tc3  2  0.0  0.0  0.54  1.0

Zr Zr Ti Tc
Zr Zr Ti Tc 0 2 + + + 0 1 o o + 0 3 + + o 0 3 + o o 0 3 o + o 1 2 + + o 1 3 + + o 1 3 + o o 1 3 o + o 2 3 o o o 2 3 o o - 3 3 + o o 3 3 o + o 
Zr2TiTc crystallizes in the monoclinic Cm space group. There are two inequivalent Zr sites. In the first Zr site, Zr(1) is bonded in a 2-coordinate geometry to one Zr(2), one Ti(1), and three equivalent Tc(1) atoms. The Zr(1)-Zr(2) bond length is 1.54 Å. The Zr(1)-Ti(1) bond length is 1.73 Å. There is one shorter (3.22 Å) and two longer (3.68 Å) Zr(1)-Tc(1) bond lengths. In the second Zr site, Zr(2) is bonded in a 2-coordinate geometry to one Zr(1), one Ti(1), and three equivalent Tc(1) atoms. The Zr(2)-Ti(1) bond length is 1.95 Å. There is one shorter (3.22 Å) and two longer (3.68 Å) Zr(2)-Tc(1) bond lengths. Ti(1) is bonded in a 2-coordinate geometry to one Zr(1), one Zr(2), and one Tc(1) atom. The Ti(1)-Tc(1) bond length is 3.27 Å. Tc(1) is bonded in a 11-coordinate geometry to three equivalent Zr(1), three equivalent Zr(2), one Ti(1), and four equivalent Tc(1) atoms. All Tc(1)-Tc(1) bond lengths are 3.29 Å.