data_Ca2GaSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.13
_cell_length_b   5.13
_cell_length_c   3.63
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ca2GaSi
_chemical_formula_sum   'Ca2 Ga1 Si1'
_cell_volume   95.35
_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  0.56  0.81  1.0
  Ca  Ca1  1  0.56  0.0  0.81  1.0
  Ga  Ga2  1  0.56  0.56  0.0  1.0
  Si  Si3  1  0.0  0.0  0.0  1.0

data_Ca2GaSi
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.25
_cell_length_b   7.25
_cell_length_c   3.63
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ca2GaSi
_chemical_formula_sum   'Ca4 Ga2 Si2'
_cell_volume   190.71
_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  0.28  0.28  0.81  1.0
  Ga  Ga1  2  0.06  0.5  -0.0  1.0
  Si  Si2  2  0.0  0.0  0.0  1.0

Ca Ca Ga Si
Ca Ca Ga Si 0 2 - o + 0 3 o + + 1 2 o - + 1 3 + o + 