data_LaNi2Se
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.62
_cell_length_b   5.62
_cell_length_c   5.62
_cell_angle_alpha   40.69
_cell_angle_beta   40.69
_cell_angle_gamma   40.69
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LaNi2Se
_chemical_formula_sum   'La1 Ni2 Se1'
_cell_volume   67.98
_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
  La  La0  1  0.0  0.0  0.72  1.0
  Ni  Ni1  1  0.0  0.0  0.45  1.0
  Ni  Ni2  1  0.0  0.0  0.99  1.0
  Se  Se3  1  0.0  0.0  0.0  1.0

data_LaNi2Se
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.77
_cell_length_b   3.91
_cell_length_c   5.62
_cell_angle_alpha   90.0
_cell_angle_beta   113.67
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   LaNi2Se
_chemical_formula_sum   'La2 Ni4 Se2'
_cell_volume   135.96
_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
  La  La0  2  -0.0  0.0  0.28  1.0
  Ni  Ni1  2  -0.0  0.0  0.01  1.0
  Ni  Ni2  2  -0.0  0.0  0.55  1.0
  Se  Se3  2  -0.0  0.0  0.0  1.0

La Ni Ni Se