data_MnSiRu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.97
_cell_length_b   3.97
_cell_length_c   3.97
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MnSiRu
_chemical_formula_sum   'Mn1 Si1 Ru1'
_cell_volume   44.4
_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
  Mn  Mn0  1  0.22  0.22  0.22  1.0
  Si  Si2  1  0.0  0.0  0.0  1.0
  Ru  Ru1  1  0.41  0.41  0.41  1.0

data_MnSiRu
_symmetry_space_group_name_H-M   R3m
_cell_length_a   3.97
_cell_length_b   3.97
_cell_length_c   9.74
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   MnSiRu
_chemical_formula_sum   'Mn3 Si3 Ru3'
_cell_volume   133.21
_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
  Mn  Mn0  3  0.0  0.0  0.78  1.0
  Si  Si1  3  0.0  0.0  0.0  1.0
  Ru  Ru2  3  0.0  0.0  0.59  1.0

Mn Si Ru
MnRuSi is half-Heusler structured and crystallizes in the trigonal R3m space group. Mn(1) is bonded in a 8-coordinate geometry to four equivalent Ru(1) and four equivalent Si(1) atoms. There is one shorter (1.84 Å) and three longer (2.69 Å) Mn(1)-Ru(1) bond lengths. There is one shorter (2.10 Å) and three longer (2.56 Å) Mn(1)-Si(1) bond lengths. Ru(1) is bonded in a distorted single-bond geometry to four equivalent Mn(1) and three equivalent Si(1) atoms. All Ru(1)-Si(1) bond lengths are 2.40 Å. Si(1) is bonded in a 7-coordinate geometry to four equivalent Mn(1) and three equivalent Ru(1) atoms.