data_Li2MgRu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.0
_cell_length_b   5.0
_cell_length_c   5.0
_cell_angle_alpha   135.41
_cell_angle_beta   135.41
_cell_angle_gamma   64.89
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Li2MgRu
_chemical_formula_sum   'Li2 Mg1 Ru1'
_cell_volume   60.61
_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
  Li  Li0  1  0.0  0.9  0.11  1.0
  Li  Li1  1  0.9  0.0  0.11  1.0
  Mg  Mg2  1  0.0  0.0  0.0  1.0
  Ru  Ru3  1  0.0  0.0  0.22  1.0

data_Li2MgRu
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.36
_cell_length_b   5.36
_cell_length_c   5.0
_cell_angle_alpha   90.0
_cell_angle_beta   122.45
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Li2MgRu
_chemical_formula_sum   'Li4 Mg2 Ru2'
_cell_volume   121.21
_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
  Li  Li0  4  0.05  0.05  0.21  1.0
  Mg  Mg1  2  0.0  0.0  0.0  1.0
  Ru  Ru2  2  0.0  0.0  0.22  1.0

Li Li Mg Ru
Li2MgRu is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Li2MgRu clusters. Li(1) is bonded in a single-bond geometry to one Mg(1) and one Ru(1) atom. The Li(1)-Mg(1) bond length is 0.98 Å. The Li(1)-Ru(1) bond length is 0.40 Å. Mg(1) is bonded in a 2-coordinate geometry to two equivalent Li(1) atoms. Ru(1) is bonded in an L-shaped geometry to two equivalent Li(1) atoms.