data_NaSr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.17
_cell_length_b   6.17
_cell_length_c   4.29
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaSr2
_chemical_formula_sum   'Na1 Sr2'
_cell_volume   163.36
_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  0.0  0.0  0.0  1.0
  Sr  Sr1  1  0.0  0.08  0.15  1.0
  Sr  Sr2  1  0.08  0.0  0.15  1.0

data_NaSr2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   8.72
_cell_length_b   8.72
_cell_length_c   4.29
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NaSr2
_chemical_formula_sum   'Na2 Sr4'
_cell_volume   326.72
_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  2  0.0  0.0  0.0  1.0
  Sr  Sr1  4  0.04  0.04  0.15  1.0

Na Sr Sr
Na Sr Sr 0 2 o o o 0 1 o o o 1 2 o o o 
NaSr2 is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two NaSr2 clusters. Na(1) is bonded in a 2-coordinate geometry to two equivalent Sr(1) atoms. Both Na(1)-Sr(1) bond lengths are 0.82 Å. Sr(1) is bonded in a 2-coordinate geometry to one Na(1) and one Sr(1) atom. The Sr(1)-Sr(1) bond length is 0.73 Å.