data_Ca2TcHg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.77
_cell_length_b   4.77
_cell_length_c   4.22
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ca2TcHg
_chemical_formula_sum   'Ca2 Tc1 Hg1'
_cell_volume   95.73
_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  Ca0  1  0.0  0.38  0.11  1.0
  Ca  Ca1  1  0.38  0.0  0.11  1.0
  Tc  Tc3  1  0.0  0.0  0.0  1.0
  Hg  Hg2  1  0.38  0.38  0.0  1.0

data_Ca2TcHg
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.74
_cell_length_b   6.74
_cell_length_c   4.22
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ca2TcHg
_chemical_formula_sum   'Ca4 Tc2 Hg2'
_cell_volume   191.45
_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  4  0.19  0.19  0.11  1.0
  Tc  Tc1  2  0.0  0.0  0.0  1.0
  Hg  Hg2  2  0.38  0.0  -0.0  1.0

Ca Ca Tc Hg