data_NaLaSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.37
_cell_length_b   5.91
_cell_length_c   4.36
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaLaSe2
_chemical_formula_sum   'Na1 La1 Se2'
_cell_volume   112.56
_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  Na1  1  0.0  0.0  0.51  1.0
  La  La0  1  0.19  0.95  0.76  1.0
  Se  Se2  1  0.0  0.95  0.57  1.0
  Se  Se3  1  0.19  0.0  0.7  1.0

data_NaLaSe2
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.36
_cell_length_b   4.37
_cell_length_c   5.91
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaLaSe2
_chemical_formula_sum   'Na1 La1 Se2'
_cell_volume   112.56
_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  0.51  0.0  0.0  1.0
  La  La1  1  0.76  0.19  0.95  1.0
  Se  Se2  1  0.57  -0.0  0.95  1.0
  Se  Se3  1  0.7  0.19  0.0  1.0

Na La Se Se
NaLaSe2 is beta oxygen-derived structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one lanthanum;selenium molecule and one selenium;sodium molecule.