data_Zr2TaCo
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.23
_cell_length_b   3.23
_cell_length_c   7.04
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Zr2TaCo
_chemical_formula_sum   'Zr2 Ta1 Co1'
_cell_volume   73.36
_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  0.61  0.61  0.46  1.0
  Zr  Zr3  1  0.61  0.61  0.58  1.0
  Ta  Ta1  1  0.0  0.0  0.52  1.0
  Co  Co0  1  0.0  0.0  0.0  1.0

data_Zr2TaCo
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.57
_cell_length_b   4.57
_cell_length_c   7.04
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Zr2TaCo
_chemical_formula_sum   'Zr4 Ta2 Co2'
_cell_volume   146.72
_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  0.11  0.5  0.46  1.0
  Zr  Zr1  2  0.11  0.5  0.58  1.0
  Ta  Ta2  2  0.0  0.0  0.52  1.0
  Co  Co3  2  0.0  0.0  0.0  1.0

Zr Zr Ta Co
Zr Zr Ta Co 0 1 o o o 0 2 + + o 0 3 + + o 0 3 + o o 0 3 o + o 1 2 + + o 1 3 + + + 1 3 + o + 1 3 o + + 2 3 o o + 2 3 o o o 3 3 + o o 3 3 o + o 
Zr2TaCo crystallizes in the monoclinic Cm space group. There are two inequivalent Zr sites. In the first Zr site, Zr(1) is bonded in a distorted single-bond geometry to one Zr(2), one Ta(1), and one Co(1) atom. The Zr(1)-Zr(2) bond length is 0.85 Å. The Zr(1)-Ta(1) bond length is 1.81 Å. The Zr(1)-Co(1) bond length is 3.69 Å. In the second Zr site, Zr(2) is bonded in a distorted single-bond geometry to one Zr(1), one Ta(1), and three equivalent Co(1) atoms. The Zr(2)-Ta(1) bond length is 1.81 Å. There is one shorter (3.44 Å) and two longer (3.77 Å) Zr(2)-Co(1) bond lengths. Ta(1) is bonded in a 2-coordinate geometry to one Zr(1), one Zr(2), and two equivalent Co(1) atoms. There is one shorter (3.38 Å) and one longer (3.66 Å) Ta(1)-Co(1) bond length. Co(1) is bonded in a 10-coordinate geometry to one Zr(1), three equivalent Zr(2), two equivalent Ta(1), and four equivalent Co(1) atoms. All Co(1)-Co(1) bond lengths are 3.23 Å.