data_NaSi2Tc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.36
_cell_length_b   4.36
_cell_length_c   3.15
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaSi2Tc
_chemical_formula_sum   'Na1 Si2 Tc1'
_cell_volume   59.97
_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
  Na  Na0  1  0.0  0.0  0.0  1.0
  Si  Si1  1  0.0  0.18  0.58  1.0
  Si  Si2  1  0.18  0.0  0.58  1.0
  Tc  Tc3  1  0.18  0.18  0.0  1.0

data_NaSi2Tc
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.17
_cell_length_b   6.17
_cell_length_c   3.15
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NaSi2Tc
_chemical_formula_sum   'Na2 Si4 Tc2'
_cell_volume   119.95
_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
  Na  Na0  2  0.0  0.0  0.0  1.0
  Si  Si1  4  0.09  0.09  0.58  1.0
  Tc  Tc2  2  0.18  0.0  -0.0  1.0

Na Si Si Tc
Na Si Si Tc 0 3 o o o 1 2 o o o 