data_EuAs2Ru
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.69
_cell_length_b   4.69
_cell_length_c   4.69
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   EuAs2Ru
_chemical_formula_sum   'Eu1 As2 Ru1'
_cell_volume   73.04
_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
  Eu  Eu2  1  0.32  0.32  0.32  1.0
  As  As0  1  0.98  0.98  0.98  1.0
  As  As1  1  0.66  0.66  0.66  1.0
  Ru  Ru3  1  0.0  0.0  0.0  1.0

data_EuAs2Ru
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.69
_cell_length_b   4.69
_cell_length_c   11.49
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   EuAs2Ru
_chemical_formula_sum   'Eu3 As6 Ru3'
_cell_volume   219.12
_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
  Eu  Eu0  3  0.0  0.0  0.68  1.0
  As  As1  3  0.0  0.0  0.02  1.0
  As  As2  3  0.0  0.0  0.34  1.0
  Ru  Ru3  3  0.0  0.0  0.0  1.0

Eu As As Ru
Eu As As Ru 0 3 o o + 0 3 o + o 0 3 + o o 0 1 - - o 0 1 - o - 0 1 o - - 0 2 - o o 0 2 o - o 0 2 o o - 1 3 + + + 1 2 + o o 1 2 o + o 1 2 o o + 2 3 o + + 2 3 + o + 2 3 + + o 
EuRuAs2 crystallizes in the trigonal R3m space group. Eu(1) is bonded in a 10-coordinate geometry to four equivalent Ru(1), three equivalent As(1), and three equivalent As(2) atoms. There are three shorter (2.71 Å) and one longer (3.65 Å) Eu(1)-Ru(1) bond length. All Eu(1)-As(1) bond lengths are 2.71 Å. All Eu(1)-As(2) bond lengths are 2.71 Å. Ru(1) is bonded in a single-bond geometry to four equivalent Eu(1) and one As(1) atom. The Ru(1)-As(1) bond length is 0.27 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a single-bond geometry to three equivalent Eu(1) and one Ru(1) atom. In the second As site, As(2) is bonded in a trigonal planar geometry to three equivalent Eu(1) atoms.