data_PmTa
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.74
_cell_length_b   5.74
_cell_length_c   5.74
_cell_angle_alpha   32.24
_cell_angle_beta   32.24
_cell_angle_gamma   32.24
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PmTa
_chemical_formula_sum   'Pm1 Ta1'
_cell_volume   47.8
_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
  Pm  Pm0  1  0.0  0.0  0.0  1.0
  Ta  Ta1  1  0.0  0.0  0.15  1.0

data_PmTa
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.52
_cell_length_b   3.19
_cell_length_c   5.74
_cell_angle_alpha   90.0
_cell_angle_beta   108.7
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   PmTa
_chemical_formula_sum   'Pm2 Ta2'
_cell_volume   95.61
_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
  Pm  Pm0  2  0.0  0.0  0.0  1.0
  Ta  Ta1  2  0.0  0.0  0.85  1.0

Pm Ta
PmTa is alpha carbon monoxide-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two PmTa clusters. Pm(1) is bonded in a single-bond geometry to one Ta(1) atom. The Pm(1)-Ta(1) bond length is 0.88 Å. Ta(1) is bonded in a single-bond geometry to one Pm(1) atom.