data_Y4TiCr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.17
_cell_length_b   6.17
_cell_length_c   6.17
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y4TiCr
_chemical_formula_sum   'Y4 Ti1 Cr1'
_cell_volume   166.25
_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
  Y  Y2  1  0.45  0.45  0.28  1.0
  Y  Y3  1  0.45  0.28  0.45  1.0
  Y  Y4  1  0.28  0.45  0.45  1.0
  Y  Y5  1  0.28  0.28  0.28  1.0
  Ti  Ti1  1  0.0  0.0  0.0  1.0
  Cr  Cr0  1  0.55  0.55  0.55  1.0

data_Y4TiCr
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.17
_cell_length_b   6.17
_cell_length_c   15.12
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Y4TiCr
_chemical_formula_sum   'Y12 Ti3 Cr3'
_cell_volume   498.74
_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
  Y  Y0  9  0.11  0.06  0.61  1.0
  Y  Y1  3  0.0  0.0  0.72  1.0
  Ti  Ti2  3  0.0  0.0  0.0  1.0
  Cr  Cr3  3  0.0  0.0  0.45  1.0

Y Y Y Y Ti Cr
Y Y Y Y Ti Cr 0 1 o o o 0 2 o o o 0 3 o o o 0 4 + o o 0 4 o + o 0 5 o o o 1 2 o o o 1 3 o o o 1 4 + o o 1 4 o o + 1 5 o o o 2 3 o o o 2 4 o + o 2 4 o o + 2 5 o o o 3 4 + o o 3 4 o + o 3 4 o o + 4 5 - - o 4 5 - o - 4 5 o - - 
Y4TiCr crystallizes in the trigonal R3m space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 2-coordinate geometry to one Y(2), two equivalent Y(1), two equivalent Ti(1), and one Cr(1) atom. The Y(1)-Y(2) bond length is 1.83 Å. Both Y(1)-Y(1) bond lengths are 1.06 Å. Both Y(1)-Ti(1) bond lengths are 3.42 Å. The Y(1)-Cr(1) bond length is 2.40 Å. In the second Y site, Y(2) is bonded in a 10-coordinate geometry to three equivalent Y(1), four equivalent Ti(1), and three equivalent Cr(1) atoms. There are three shorter (3.66 Å) and one longer (4.21 Å) Y(2)-Ti(1) bond length. All Y(2)-Cr(1) bond lengths are 3.70 Å. Ti(1) is bonded in a 10-coordinate geometry to four equivalent Y(2) and six equivalent Y(1) atoms. Cr(1) is bonded in a 6-coordinate geometry to three equivalent Y(1) and three equivalent Y(2) atoms.