data_ZrAlZn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.04
_cell_length_b   5.04
_cell_length_c   5.04
_cell_angle_alpha   132.35
_cell_angle_beta   132.35
_cell_angle_gamma   69.68
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZrAlZn2
_chemical_formula_sum   'Zr1 Al1 Zn2'
_cell_volume   68.57
_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
  Zr  Zr3  1  0.0  0.0  0.14  1.0
  Al  Al0  1  0.0  0.0  0.0  1.0
  Zn  Zn1  1  0.04  0.0  0.07  1.0
  Zn  Zn2  1  0.0  0.04  0.07  1.0

data_ZrAlZn2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.76
_cell_length_b   5.76
_cell_length_c   5.04
_cell_angle_alpha   90.0
_cell_angle_beta   124.84
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   ZrAlZn2
_chemical_formula_sum   'Zr2 Al2 Zn4'
_cell_volume   137.13
_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
  Zr  Zr0  2  0.36  0.5  0.86  1.0
  Al  Al1  2  0.0  0.0  0.0  1.0
  Zn  Zn2  4  0.45  0.48  0.97  1.0

Zr Al Zn Zn
ZrZn2Al crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two ZrZn2Al clusters. Zr(1) is bonded in a 2-coordinate geometry to two equivalent Zn(1) atoms. Both Zr(1)-Zn(1) bond lengths are 0.48 Å. Zn(1) is bonded in a distorted single-bond geometry to one Zr(1), one Zn(1), and one Al(1) atom. The Zn(1)-Zn(1) bond length is 0.21 Å. The Zn(1)-Al(1) bond length is 0.26 Å. Al(1) is bonded in a 2-coordinate geometry to two equivalent Zn(1) atoms.