The material structure described by K2ZnH4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one H(2), two equivalent H(1), and two equivalent H(3) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one H(2), two equivalent H(3), and four equivalent H(1) atoms. Zn(1) is bonded in a tetrahedral geometry to one H(2), one H(3), and two equivalent H(1) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one Zn(1) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Zn(1) atom. In the third H site, H(3) is bonded in a distorted single-bond geometry to two equivalent K(1), two equivalent K(2), and one Zn(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2ZnH4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.780
_cell_length_b   7.727
_cell_length_c   10.188
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   455.047
_cell_formula_units_Z   4
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  0.250  0.159  0.592  1.0
  K  K1  1  0.250  0.659  0.908  1.0
  K  K2  1  0.750  0.841  0.408  1.0
  K  K3  1  0.750  0.341  0.092  1.0
  K  K4  1  0.250  0.486  0.313  1.0
  K  K5  1  0.250  0.986  0.187  1.0
  K  K6  1  0.750  0.514  0.687  1.0
  K  K7  1  0.750  0.014  0.813  1.0
  Zn  Zn8  1  0.250  0.236  0.918  1.0
  Zn  Zn9  1  0.250  0.736  0.582  1.0
  Zn  Zn10  1  0.750  0.764  0.082  1.0
  Zn  Zn11  1  0.750  0.264  0.418  1.0
  H  H12  1  0.018  0.313  0.846  1.0
  H  H13  1  0.482  0.813  0.654  1.0
  H  H14  1  0.518  0.687  0.154  1.0
  H  H15  1  0.982  0.187  0.346  1.0
  H  H16  1  0.982  0.687  0.154  1.0
  H  H17  1  0.518  0.187  0.346  1.0
  H  H18  1  0.482  0.313  0.846  1.0
  H  H19  1  0.018  0.813  0.654  1.0
  H  H20  1  0.250  0.024  0.912  1.0
  H  H21  1  0.250  0.524  0.588  1.0
  H  H22  1  0.750  0.976  0.088  1.0
  H  H23  1  0.750  0.476  0.412  1.0
  H  H24  1  0.250  0.808  0.429  1.0
  H  H25  1  0.250  0.308  0.071  1.0
  H  H26  1  0.750  0.192  0.571  1.0
  H  H27  1  0.750  0.692  0.929  1.0
[/CIF]
.
The material structure described by K2ZnH4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one H(2), two equivalent H(1), and two equivalent H(3) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one H(2), two equivalent H(3), and four equivalent H(1) atoms. Zn(1) is bonded in a tetrahedral geometry to one H(2), one H(3), and two equivalent H(1) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one Zn(1) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Zn(1) atom. In the third H site, H(3) is bonded in a distorted single-bond geometry to two equivalent K(1), two equivalent K(2), and one Zn(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2ZnH4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.780
_cell_length_b   7.727
_cell_length_c   10.188
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   455.047
_cell_formula_units_Z   4
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  0.250  0.159  0.592  1.0
  K  K1  1  0.250  0.659  0.908  1.0
  K  K2  1  0.750  0.841  0.408  1.0
  K  K3  1  0.750  0.341  0.092  1.0
  K  K4  1  0.250  0.486  0.313  1.0
  K  K5  1  0.250  0.986  0.187  1.0
  K  K6  1  0.750  0.514  0.687  1.0
  K  K7  1  0.750  0.014  0.813  1.0
  Zn  Zn8  1  0.250  0.236  0.918  1.0
  Zn  Zn9  1  0.250  0.736  0.582  1.0
  Zn  Zn10  1  0.750  0.764  0.082  1.0
  Zn  Zn11  1  0.750  0.264  0.418  1.0
  H  H12  1  0.018  0.313  0.846  1.0
  H  H13  1  0.482  0.813  0.654  1.0
  H  H14  1  0.518  0.687  0.154  1.0
  H  H15  1  0.982  0.187  0.346  1.0
  H  H16  1  0.982  0.687  0.154  1.0
  H  H17  1  0.518  0.187  0.346  1.0
  H  H18  1  0.482  0.313  0.846  1.0
  H  H19  1  0.018  0.813  0.654  1.0
  H  H20  1  0.250  0.024  0.912  1.0
  H  H21  1  0.250  0.524  0.588  1.0
  H  H22  1  0.750  0.976  0.088  1.0
  H  H23  1  0.750  0.476  0.412  1.0
  H  H24  1  0.250  0.808  0.429  1.0
  H  H25  1  0.250  0.308  0.071  1.0
  H  H26  1  0.750  0.192  0.571  1.0
  H  H27  1  0.750  0.692  0.929  1.0
[/CIF]
.