data_Sm2TmSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.28
_cell_length_b   5.28
_cell_length_c   5.28
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sm2TmSi
_chemical_formula_sum   'Sm2 Tm1 Si1'
_cell_volume   103.8
_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
  Sm  Sm1  1  0.6  0.6  0.6  1.0
  Sm  Sm2  1  0.87  0.87  0.87  1.0
  Tm  Tm3  1  0.73  0.73  0.73  1.0
  Si  Si0  1  0.0  0.0  0.0  1.0

data_Sm2TmSi
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.28
_cell_length_b   5.28
_cell_length_c   12.92
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Sm2TmSi
_chemical_formula_sum   'Sm6 Tm3 Si3'
_cell_volume   311.41
_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
  Sm  Sm0  3  0.0  0.0  0.13  1.0
  Sm  Sm1  3  0.0  0.0  0.4  1.0
  Tm  Tm2  3  0.0  0.0  0.27  1.0
  Si  Si3  3  0.0  0.0  0.0  1.0

Sm Sm Tm Si
TmSm2Si crystallizes in the trigonal R3m space group. Tm(1) is bonded in a distorted linear geometry to one Sm(1), one Sm(2), and three equivalent Si(1) atoms. The Tm(1)-Sm(1) bond length is 1.74 Å. The Tm(1)-Sm(2) bond length is 1.74 Å. All Tm(1)-Si(1) bond lengths are 3.15 Å. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a single-bond geometry to one Tm(1) atom. In the second Sm site, Sm(2) is bonded in a distorted linear geometry to one Tm(1) and one Si(1) atom. The Sm(2)-Si(1) bond length is 1.74 Å. Si(1) is bonded in a single-bond geometry to three equivalent Tm(1) and one Sm(2) atom.