data_Na2SrLa
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.65
_cell_length_b   6.65
_cell_length_c   6.65
_cell_angle_alpha   131.48
_cell_angle_beta   131.48
_cell_angle_gamma   71.04
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2SrLa
_chemical_formula_sum   'Na2 Sr1 La1'
_cell_volume   161.66
_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  0.73  0.71  1.0
  Na  Na2  1  0.73  0.0  0.71  1.0
  Sr  Sr3  1  0.0  0.0  0.0  1.0
  La  La0  1  0.0  0.0  0.41  1.0

data_Na2SrLa
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.73
_cell_length_b   7.73
_cell_length_c   6.65
_cell_angle_alpha   90.0
_cell_angle_beta   125.52
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Na2SrLa
_chemical_formula_sum   'Na4 Sr2 La2'
_cell_volume   323.32
_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
  Na  Na0  4  0.13  0.13  0.97  1.0
  Sr  Sr1  2  0.0  0.0  0.0  1.0
  La  La2  2  0.0  0.0  0.41  1.0

Na Na Sr La
Na Na Sr La 0 2 o + + 0 3 o + o 1 2 + o + 1 3 + o o 2 3 o o o 
Na2SrLa crystallizes in the monoclinic Cm space group. Na(1) is bonded in a distorted single-bond geometry to one Sr(1) and two equivalent La(1) atoms. The Na(1)-Sr(1) bond length is 1.54 Å. There is one shorter (3.40 Å) and one longer (3.87 Å) Na(1)-La(1) bond length. Sr(1) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one La(1) atom. The Sr(1)-La(1) bond length is 2.75 Å. La(1) is bonded in a distorted single-bond geometry to four equivalent Na(1) and one Sr(1) atom.