data_K2CaZn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.02
_cell_length_b   4.02
_cell_length_c   11.3
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   91.4
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2CaZn
_chemical_formula_sum   'K2 Ca1 Zn1'
_cell_volume   182.33
_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  0.81  0.0  0.35  1.0
  K  K2  1  0.81  0.0  0.95  1.0
  Ca  Ca0  1  0.0  0.0  0.0  1.0
  Zn  Zn3  1  0.0  0.0  0.65  1.0

data_K2CaZn
_symmetry_space_group_name_H-M   Pm
_cell_length_a   4.02
_cell_length_b   4.02
_cell_length_c   11.3
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   6
_chemical_formula_structural   K2CaZn
_chemical_formula_sum   'K2 Ca1 Zn1'
_cell_volume   182.39
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '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  0.81  0.0  0.35  1.0
  K  K1  1  0.81  0.0  0.95  1.0
  Ca  Ca2  1  0.0  0.0  0.0  1.0
  Zn  Zn3  1  0.0  0.0  0.65  1.0

K K Ca Zn
K2CaZn crystallizes in the monoclinic Pm space group. The structure is zero-dimensional and consists of one K2CaZn cluster. There are two inequivalent K sites. In the first K site, K(1) is bonded in a distorted single-bond geometry to one Zn(1) atom. The K(1)-Zn(1) bond length is 3.49 Å. In the second K site, K(2) is bonded in a distorted single-bond geometry to one Ca(1) and one Zn(1) atom. The K(2)-Ca(1) bond length is 0.95 Å. The K(2)-Zn(1) bond length is 3.49 Å. Ca(1) is bonded in a single-bond geometry to one K(2) atom. Zn(1) is bonded in a bent 150 degrees geometry to one K(1) and one K(2) atom.