data_Cr2BRu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.68
_cell_length_b   4.68
_cell_length_c   4.68
_cell_angle_alpha   139.22
_cell_angle_beta   139.22
_cell_angle_gamma   59.04
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cr2BRu
_chemical_formula_sum   'Cr2 B1 Ru1'
_cell_volume   43.32
_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
  Cr  Cr1  1  0.63  0.0  0.04  1.0
  Cr  Cr2  1  0.0  0.63  0.04  1.0
  B  B0  1  0.0  0.0  0.0  1.0
  Ru  Ru3  1  0.0  0.0  0.07  1.0

data_Cr2BRu
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.61
_cell_length_b   4.61
_cell_length_c   4.68
_cell_angle_alpha   90.0
_cell_angle_beta   119.52
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Cr2BRu
_chemical_formula_sum   'Cr4 B2 Ru2'
_cell_volume   86.65
_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
  Cr  Cr0  4  0.32  0.32  0.59  1.0
  B  B1  2  0.0  0.0  0.0  1.0
  Ru  Ru2  2  0.0  0.0  0.93  1.0

Cr Cr B Ru
Cr2RuB crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Cr2RuB clusters. Cr(1) is bonded in a distorted single-bond geometry to one Ru(1) atom. The Cr(1)-Ru(1) bond length is 1.60 Å. Ru(1) is bonded in a 3-coordinate geometry to two equivalent Cr(1) and one B(1) atom. The Ru(1)-B(1) bond length is 0.34 Å. B(1) is bonded in a single-bond geometry to one Ru(1) atom.