data_KAlSn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.79
_cell_length_b   3.79
_cell_length_c   7.98
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KAlSn2
_chemical_formula_sum   'K1 Al1 Sn2'
_cell_volume   114.74
_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  K1  1  0.0  0.0  0.99  1.0
  Al  Al0  1  0.0  0.0  0.0  1.0
  Sn  Sn2  1  0.9  0.9  0.51  1.0
  Sn  Sn3  1  0.9  0.9  0.47  1.0

data_KAlSn2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.36
_cell_length_b   5.36
_cell_length_c   7.98
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   KAlSn2
_chemical_formula_sum   'K2 Al2 Sn4'
_cell_volume   229.48
_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  0.99  1.0
  Al  Al1  2  0.0  0.0  0.0  1.0
  Sn  Sn2  2  0.4  0.5  0.47  1.0
  Sn  Sn3  2  0.4  0.5  0.51  1.0

K Al Sn Sn
K Al Sn Sn 0 1 o o + 2 3 o o o 
AlK(Sn)2 is High Pressure Cadmuum Telluride structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two tin molecules and two AlK clusters. In each AlK cluster, K(1) is bonded in a single-bond geometry to one Al(1) atom. The K(1)-Al(1) bond length is 0.08 Å. Al(1) is bonded in a single-bond geometry to one K(1) atom.