The material described by YCrFe11 crystallizes in the orthorhombic Imm2 space group. Y(1) is bonded in a 20-coordinate geometry to one Cr(1), one Fe(5), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(6), four equivalent Fe(1), and eight equivalent Fe(4) atoms. Cr(1) is bonded in a 14-coordinate geometry to one Y(1), one Fe(5), two equivalent Fe(1), two equivalent Fe(2), four equivalent Fe(4), and four equivalent Fe(6) atoms. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to two equivalent Y(1), one Cr(1), one Fe(2), one Fe(3), one Fe(5), two equivalent Fe(6), and four equivalent Fe(4) atoms. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to two equivalent Y(1), two equivalent Cr(1), two equivalent Fe(1), two equivalent Fe(6), and four equivalent Fe(4) atoms. In the third Fe site, Fe(3) is bonded to two equivalent Y(1), two equivalent Fe(1), two equivalent Fe(5), two equivalent Fe(6), and four equivalent Fe(4) atoms to form distorted FeY2Fe10 cuboctahedra that share corners with eight equivalent Fe(4)Y2CrFe9 cuboctahedra, edges with two equivalent Fe(3)Y2Fe10 cuboctahedra, edges with four equivalent Fe(4)Y2CrFe9 cuboctahedra, and faces with eight equivalent Fe(4)Y2CrFe9 cuboctahedra. In the fourth Fe site, Fe(4) is bonded to two equivalent Y(1), one Cr(1), one Fe(2), one Fe(3), one Fe(5), two equivalent Fe(1), two equivalent Fe(4), and two equivalent Fe(6) atoms to form distorted FeY2CrFe9 cuboctahedra that share corners with two equivalent Fe(3)Y2Fe10 cuboctahedra, corners with ten equivalent Fe(4)Y2CrFe9 cuboctahedra,  an edgeedge with one Fe(3)Y2Fe10 cuboctahedra, edges with four equivalent Fe(4)Y2CrFe9 cuboctahedra, faces with two equivalent Fe(3)Y2Fe10 cuboctahedra, and faces with six equivalent Fe(4)Y2CrFe9 cuboctahedra. In the fifth Fe site, Fe(5) is bonded in a distorted single-bond geometry to one Y(1), one Cr(1), two equivalent Fe(1), two equivalent Fe(3), four equivalent Fe(4), and four equivalent Fe(6) atoms. In the sixth Fe site, Fe(6) is bonded in a 14-coordinate geometry to one Y(1), two equivalent Cr(1), one Fe(2), one Fe(3), one Fe(6), two equivalent Fe(1), two equivalent Fe(5), and four equivalent Fe(4) atoms. is represented by the CIF card [CIF]
data_YCrFe11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.419
_cell_length_b   6.419
_cell_length_c   6.419
_cell_angle_alpha   137.368
_cell_angle_beta   98.265
_cell_angle_gamma   96.922
_symmetry_Int_Tables_number   1
_cell_volume   166.875
_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  Y0  1  0.994  0.994  0.000  1.0
  Cr  Cr1  1  0.366  0.366  0.000  1.0
  Fe  Fe2  1  0.225  0.501  0.725  1.0
  Fe  Fe3  1  0.776  0.501  0.275  1.0
  Fe  Fe4  1  0.230  0.730  0.500  1.0
  Fe  Fe5  1  0.771  0.271  0.500  1.0
  Fe  Fe6  1  0.498  1.000  0.999  1.0
  Fe  Fe7  1  0.498  0.499  0.498  1.0
  Fe  Fe8  1  0.001  1.000  0.502  1.0
  Fe  Fe9  1  0.001  0.499  0.001  1.0
  Fe  Fe10  1  0.634  0.634  0.000  1.0
  Fe  Fe11  1  0.643  0.002  0.641  1.0
  Fe  Fe12  1  0.361  0.002  0.359  1.0
[/CIF]
.
The material described by YCrFe11 crystallizes in the orthorhombic Imm2 space group. Y(1) is bonded in a 20-coordinate geometry to one Cr(1), one Fe(5), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(6), four equivalent Fe(1), and eight equivalent Fe(4) atoms. Cr(1) is bonded in a 14-coordinate geometry to one Y(1), one Fe(5), two equivalent Fe(1), two equivalent Fe(2), four equivalent Fe(4), and four equivalent Fe(6) atoms. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to two equivalent Y(1), one Cr(1), one Fe(2), one Fe(3), one Fe(5), two equivalent Fe(6), and four equivalent Fe(4) atoms. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to two equivalent Y(1), two equivalent Cr(1), two equivalent Fe(1), two equivalent Fe(6), and four equivalent Fe(4) atoms. In the third Fe site, Fe(3) is bonded to two equivalent Y(1), two equivalent Fe(1), two equivalent Fe(5), two equivalent Fe(6), and four equivalent Fe(4) atoms to form distorted FeY2Fe10 cuboctahedra that share corners with eight equivalent Fe(4)Y2CrFe9 cuboctahedra, edges with two equivalent Fe(3)Y2Fe10 cuboctahedra, edges with four equivalent Fe(4)Y2CrFe9 cuboctahedra, and faces with eight equivalent Fe(4)Y2CrFe9 cuboctahedra. In the fourth Fe site, Fe(4) is bonded to two equivalent Y(1), one Cr(1), one Fe(2), one Fe(3), one Fe(5), two equivalent Fe(1), two equivalent Fe(4), and two equivalent Fe(6) atoms to form distorted FeY2CrFe9 cuboctahedra that share corners with two equivalent Fe(3)Y2Fe10 cuboctahedra, corners with ten equivalent Fe(4)Y2CrFe9 cuboctahedra,  an edgeedge with one Fe(3)Y2Fe10 cuboctahedra, edges with four equivalent Fe(4)Y2CrFe9 cuboctahedra, faces with two equivalent Fe(3)Y2Fe10 cuboctahedra, and faces with six equivalent Fe(4)Y2CrFe9 cuboctahedra. In the fifth Fe site, Fe(5) is bonded in a distorted single-bond geometry to one Y(1), one Cr(1), two equivalent Fe(1), two equivalent Fe(3), four equivalent Fe(4), and four equivalent Fe(6) atoms. In the sixth Fe site, Fe(6) is bonded in a 14-coordinate geometry to one Y(1), two equivalent Cr(1), one Fe(2), one Fe(3), one Fe(6), two equivalent Fe(1), two equivalent Fe(5), and four equivalent Fe(4) atoms. is represented by the CIF card [CIF]
data_YCrFe11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.419
_cell_length_b   6.419
_cell_length_c   6.419
_cell_angle_alpha   137.368
_cell_angle_beta   98.265
_cell_angle_gamma   96.922
_symmetry_Int_Tables_number   1
_cell_volume   166.875
_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  Y0  1  0.994  0.994  0.000  1.0
  Cr  Cr1  1  0.366  0.366  0.000  1.0
  Fe  Fe2  1  0.225  0.501  0.725  1.0
  Fe  Fe3  1  0.776  0.501  0.275  1.0
  Fe  Fe4  1  0.230  0.730  0.500  1.0
  Fe  Fe5  1  0.771  0.271  0.500  1.0
  Fe  Fe6  1  0.498  1.000  0.999  1.0
  Fe  Fe7  1  0.498  0.499  0.498  1.0
  Fe  Fe8  1  0.001  1.000  0.502  1.0
  Fe  Fe9  1  0.001  0.499  0.001  1.0
  Fe  Fe10  1  0.634  0.634  0.000  1.0
  Fe  Fe11  1  0.643  0.002  0.641  1.0
  Fe  Fe12  1  0.361  0.002  0.359  1.0
[/CIF]
.