data_CaAlTc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.8
_cell_length_b   6.8
_cell_length_c   6.8
_cell_angle_alpha   154.52
_cell_angle_beta   154.52
_cell_angle_gamma   36.35
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CaAlTc
_chemical_formula_sum   'Ca1 Al1 Tc1'
_cell_volume   58.15
_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
  Ca  Ca1  1  0.0  0.0  0.26  1.0
  Al  Al0  1  0.0  0.0  0.3  1.0
  Tc  Tc2  1  0.0  0.0  0.36  1.0

data_CaAlTc
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.24
_cell_length_b   4.24
_cell_length_c   6.8
_cell_angle_alpha   90.0
_cell_angle_beta   108.17
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   CaAlTc
_chemical_formula_sum   'Ca2 Al2 Tc2'
_cell_volume   116.3
_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
  Ca  Ca0  2  0.0  0.0  0.74  1.0
  Al  Al1  2  0.0  0.0  0.7  1.0
  Tc  Tc2  2  0.0  0.0  0.64  1.0

Ca Al Tc
Ca Al Tc 0 1 o o o 1 2 o o o 
CaTcAl is Cyanogen Chloride-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two CaTcAl clusters. Ca(1) is bonded in a single-bond geometry to one Al(1) atom. The Ca(1)-Al(1) bond length is 0.31 Å. Tc(1) is bonded in a single-bond geometry to one Al(1) atom. The Tc(1)-Al(1) bond length is 0.41 Å. Al(1) is bonded in a linear geometry to one Ca(1) and one Tc(1) atom.