data_AlZnRu2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.01
_cell_length_b   3.01
_cell_length_c   6.07
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlZnRu2
_chemical_formula_sum   'Al1 Zn1 Ru2'
_cell_volume   55.1
_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
  Al  Al0  1  0.0  0.0  0.0  1.0
  Zn  Zn3  1  0.0  0.0  0.03  1.0
  Ru  Ru1  1  0.51  0.51  0.48  1.0
  Ru  Ru2  1  0.51  0.51  0.59  1.0

data_AlZnRu2
_symmetry_space_group_name_H-M   P4mm
_cell_length_a   3.01
_cell_length_b   3.01
_cell_length_c   6.07
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   99
_chemical_formula_structural   AlZnRu2
_chemical_formula_sum   'Al1 Zn1 Ru2'
_cell_volume   55.1
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x, z'
  3  '-x, -y, z'
  4  'y, -x, z'
  5  '-x, y, z'
  6  'y, x, z'
  7  'x, -y, z'
  8  '-y, -x, 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
  Al  Al0  1  0.0  0.0  0.0  1.0
  Zn  Zn1  1  0.0  0.0  0.03  1.0
  Ru  Ru2  1  0.5  0.5  0.48  1.0
  Ru  Ru3  1  0.5  0.5  0.59  1.0

Al Zn Ru Ru
Al Zn Ru Ru 0 1 o o o 2 3 o o o 
(Ru)2ZnAl is beta oxygen-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two aluminium--zinc (1/1) molecules and two Ru clusters. In each Ru cluster, there are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a single-bond geometry to one Ru(2) atom. The Ru(1)-Ru(2) bond length is 0.65 Å. In the second Ru site, Ru(2) is bonded in a single-bond geometry to one Ru(1) atom.