data_DyHo2Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.19
_cell_length_b   5.19
_cell_length_c   5.19
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   DyHo2Si
_chemical_formula_sum   'Dy1 Ho2 Si1'
_cell_volume   98.94
_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
  Dy  Dy0  1  0.67  0.67  0.67  1.0
  Ho  Ho1  1  0.84  0.84  0.84  1.0
  Ho  Ho2  1  0.51  0.51  0.51  1.0
  Si  Si3  1  0.0  0.0  0.0  1.0

data_DyHo2Si
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.19
_cell_length_b   5.19
_cell_length_c   12.72
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   DyHo2Si
_chemical_formula_sum   'Dy3 Ho6 Si3'
_cell_volume   296.81
_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
  Dy  Dy0  3  0.0  0.0  0.33  1.0
  Ho  Ho1  3  0.0  0.0  0.16  1.0
  Ho  Ho2  3  0.0  0.0  0.49  1.0
  Si  Si3  3  0.0  0.0  0.0  1.0

Dy Ho Ho Si
Ho2DySi crystallizes in the trigonal R3m space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a distorted linear geometry to one Dy(1) and one Si(1) atom. The Ho(1)-Dy(1) bond length is 2.09 Å. The Ho(1)-Si(1) bond length is 2.09 Å. In the second Ho site, Ho(2) is bonded in a distorted single-bond geometry to one Dy(1) atom. The Ho(2)-Dy(1) bond length is 2.09 Å. Dy(1) is bonded to one Ho(1), one Ho(2), and three equivalent Si(1) atoms to form DyHo2Si3 trigonal bipyramids that share corners with six equivalent Dy(1)Ho2Si3 trigonal bipyramids and  a cornercorner with one Si(1)Dy3Ho trigonal pyramid. All Dy(1)-Si(1) bond lengths are 3.00 Å. Si(1) is bonded to one Ho(1) and three equivalent Dy(1) atoms to form distorted SiDy3Ho trigonal pyramids that share  a cornercorner with one Dy(1)Ho2Si3 trigonal bipyramid and corners with six equivalent Si(1)Dy3Ho trigonal pyramids.