data_SiNiRu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.87
_cell_length_b   3.87
_cell_length_c   3.87
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiNiRu
_chemical_formula_sum   'Si1 Ni1 Ru1'
_cell_volume   41.0
_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
  Si  Si2  1  0.0  0.0  0.0  1.0
  Ni  Ni0  1  0.11  0.11  0.11  1.0
  Ru  Ru1  1  0.37  0.37  0.37  1.0

data_SiNiRu
_symmetry_space_group_name_H-M   R3m
_cell_length_a   3.87
_cell_length_b   3.87
_cell_length_c   9.48
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   SiNiRu
_chemical_formula_sum   'Si3 Ni3 Ru3'
_cell_volume   122.99
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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
  Si  Si0  3  0.0  0.0  0.0  1.0
  Ni  Ni1  3  0.0  0.0  0.89  1.0
  Ru  Ru2  3  0.0  0.0  0.63  1.0

Si Ni Ru
RuNiSi crystallizes in the trigonal R3m space group. Ru(1) is bonded to four equivalent Ni(1) and three equivalent Si(1) atoms to form a mixture of distorted corner and edge-sharing RuSi3Ni4 hexagonal pyramids. There are three shorter (2.33 Å) and one longer (2.50 Å) Ru(1)-Ni(1) bond length. All Ru(1)-Si(1) bond lengths are 2.26 Å. Ni(1) is bonded in a distorted single-bond geometry to four equivalent Ru(1) and one Si(1) atom. The Ni(1)-Si(1) bond length is 1.00 Å. Si(1) is bonded in a distorted single-bond geometry to three equivalent Ru(1) and one Ni(1) atom.