data_Ca2ZrSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.28
_cell_length_b   3.28
_cell_length_c   9.53
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ca2ZrSi
_chemical_formula_sum   'Ca2 Zr1 Si1'
_cell_volume   102.72
_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  0.64  0.64  0.55  1.0
  Ca  Ca1  1  0.64  0.64  0.99  1.0
  Zr  Zr3  1  0.0  0.0  0.77  1.0
  Si  Si2  1  0.0  0.0  0.0  1.0

data_Ca2ZrSi
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.64
_cell_length_b   4.64
_cell_length_c   9.53
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ca2ZrSi
_chemical_formula_sum   'Ca4 Zr2 Si2'
_cell_volume   205.45
_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  2  0.14  0.5  0.55  1.0
  Ca  Ca1  2  0.14  0.5  0.99  1.0
  Zr  Zr2  2  0.0  0.0  0.77  1.0
  Si  Si3  2  0.0  0.0  0.0  1.0

Ca Ca Zr Si
Ca Ca Zr Si 0 2 o + o 0 2 + o o 0 2 + + o 0 0 + o o 0 0 o + o 1 3 + + + 1 2 + + o 2 3 o o + 