data_KNaSr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.36
_cell_length_b   4.36
_cell_length_c   11.4
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KNaSr2
_chemical_formula_sum   'K1 Na1 Sr2'
_cell_volume   216.52
_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
  K  K0  1  0.0  0.0  0.7  1.0
  Na  Na1  1  0.0  0.0  0.0  1.0
  Sr  Sr2  1  0.18  0.18  0.34  1.0
  Sr  Sr3  1  0.18  0.18  0.06  1.0

data_KNaSr2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.16
_cell_length_b   6.16
_cell_length_c   11.4
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   KNaSr2
_chemical_formula_sum   'K2 Na2 Sr4'
_cell_volume   433.05
_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
  K  K0  2  0.0  0.0  0.7  1.0
  Na  Na1  2  0.0  0.0  0.0  1.0
  Sr  Sr2  2  0.18  0.0  0.06  1.0
  Sr  Sr3  2  0.18  0.0  0.34  1.0

K Na Sr Sr
K Na Sr Sr 0 0 + o o 0 0 o + o 0 2 o o o 0 3 o o + 0 1 o o + 1 3 o o o 1 2 o o o 2 3 o o o 
KNaSr2 crystallizes in the monoclinic Cm space group. K(1) is bonded in a 6-coordinate geometry to four equivalent K(1), one Na(1), and one Sr(1) atom. All K(1)-K(1) bond lengths are 4.36 Å. The K(1)-Na(1) bond length is 3.43 Å. The K(1)-Sr(1) bond length is 4.24 Å. Na(1) is bonded in a distorted single-bond geometry to one K(1) and one Sr(2) atom. The Na(1)-Sr(2) bond length is 1.29 Å. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one K(1), one Sr(2), and four equivalent Sr(1) atoms to form a mixture of distorted corner and edge-sharing SrKSr5 octahedra. The corner-sharing octahedra are not tilted. The Sr(1)-Sr(2) bond length is 3.21 Å. All Sr(1)-Sr(1) bond lengths are 4.36 Å. In the second Sr site, Sr(2) is bonded in a single-bond geometry to one Na(1) and one Sr(1) atom.