The compound described by YbCr4Al8 crystallizes in the tetragonal I4/mmm space group. Yb(1) is bonded in a 20-coordinate geometry to eight equivalent Cr(1), four equivalent Al(1), and eight equivalent Al(2) atoms. Cr(1) is bonded to two equivalent Yb(1), two equivalent Cr(1), four equivalent Al(1), and four equivalent Al(2) atoms to form distorted CrYb2Al8Cr2 cuboctahedra that share corners with eight equivalent Al(2)Yb2Al6Cr4 cuboctahedra, corners with ten equivalent Cr(1)Yb2Al8Cr2 cuboctahedra, edges with four equivalent Cr(1)Yb2Al8Cr2 cuboctahedra, edges with four equivalent Al(2)Yb2Al6Cr4 cuboctahedra, faces with six equivalent Cr(1)Yb2Al8Cr2 cuboctahedra, and faces with eight equivalent Al(2)Yb2Al6Cr4 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one Yb(1), four equivalent Cr(1), one Al(1), and four equivalent Al(2) atoms. In the second Al site, Al(2) is bonded to two equivalent Yb(1), four equivalent Cr(1), two equivalent Al(2), and four equivalent Al(1) atoms to form distorted AlYb2Al6Cr4 cuboctahedra that share corners with eight equivalent Cr(1)Yb2Al8Cr2 cuboctahedra, corners with ten equivalent Al(2)Yb2Al6Cr4 cuboctahedra, edges with three equivalent Al(2)Yb2Al6Cr4 cuboctahedra, edges with four equivalent Cr(1)Yb2Al8Cr2 cuboctahedra, faces with seven equivalent Al(2)Yb2Al6Cr4 cuboctahedra, and faces with eight equivalent Cr(1)Yb2Al8Cr2 cuboctahedra. is represented by the CIF card [CIF]
data_Yb(Al2Cr)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.068
_cell_length_b   6.825
_cell_length_c   6.825
_cell_angle_alpha   82.077
_cell_angle_beta   68.207
_cell_angle_gamma   68.207
_symmetry_Int_Tables_number   1
_cell_volume   203.538
_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
  Yb  Yb0  1  0.000  0.000  0.000  1.0
  Al  Al1  1  0.000  0.336  0.664  1.0
  Al  Al2  1  0.000  0.664  0.336  1.0
  Al  Al3  1  0.664  0.336  0.336  1.0
  Al  Al4  1  0.336  0.664  0.664  1.0
  Al  Al5  1  0.500  0.771  0.229  1.0
  Al  Al6  1  0.500  0.229  0.771  1.0
  Al  Al7  1  0.729  0.771  0.771  1.0
  Al  Al8  1  0.271  0.229  0.229  1.0
  Cr  Cr9  1  0.000  0.000  0.500  1.0
  Cr  Cr10  1  0.500  0.000  0.500  1.0
  Cr  Cr11  1  0.500  0.500  0.000  1.0
  Cr  Cr12  1  0.000  0.500  0.000  1.0
[/CIF]
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The compound described by YbCr4Al8 crystallizes in the tetragonal I4/mmm space group. Yb(1) is bonded in a 20-coordinate geometry to eight equivalent Cr(1), four equivalent Al(1), and eight equivalent Al(2) atoms. Cr(1) is bonded to two equivalent Yb(1), two equivalent Cr(1), four equivalent Al(1), and four equivalent Al(2) atoms to form distorted CrYb2Al8Cr2 cuboctahedra that share corners with eight equivalent Al(2)Yb2Al6Cr4 cuboctahedra, corners with ten equivalent Cr(1)Yb2Al8Cr2 cuboctahedra, edges with four equivalent Cr(1)Yb2Al8Cr2 cuboctahedra, edges with four equivalent Al(2)Yb2Al6Cr4 cuboctahedra, faces with six equivalent Cr(1)Yb2Al8Cr2 cuboctahedra, and faces with eight equivalent Al(2)Yb2Al6Cr4 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one Yb(1), four equivalent Cr(1), one Al(1), and four equivalent Al(2) atoms. In the second Al site, Al(2) is bonded to two equivalent Yb(1), four equivalent Cr(1), two equivalent Al(2), and four equivalent Al(1) atoms to form distorted AlYb2Al6Cr4 cuboctahedra that share corners with eight equivalent Cr(1)Yb2Al8Cr2 cuboctahedra, corners with ten equivalent Al(2)Yb2Al6Cr4 cuboctahedra, edges with three equivalent Al(2)Yb2Al6Cr4 cuboctahedra, edges with four equivalent Cr(1)Yb2Al8Cr2 cuboctahedra, faces with seven equivalent Al(2)Yb2Al6Cr4 cuboctahedra, and faces with eight equivalent Cr(1)Yb2Al8Cr2 cuboctahedra. is represented by the CIF card [CIF]
data_Yb(Al2Cr)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.068
_cell_length_b   6.825
_cell_length_c   6.825
_cell_angle_alpha   82.077
_cell_angle_beta   68.207
_cell_angle_gamma   68.207
_symmetry_Int_Tables_number   1
_cell_volume   203.538
_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
  Yb  Yb0  1  0.000  0.000  0.000  1.0
  Al  Al1  1  0.000  0.336  0.664  1.0
  Al  Al2  1  0.000  0.664  0.336  1.0
  Al  Al3  1  0.664  0.336  0.336  1.0
  Al  Al4  1  0.336  0.664  0.664  1.0
  Al  Al5  1  0.500  0.771  0.229  1.0
  Al  Al6  1  0.500  0.229  0.771  1.0
  Al  Al7  1  0.729  0.771  0.771  1.0
  Al  Al8  1  0.271  0.229  0.229  1.0
  Cr  Cr9  1  0.000  0.000  0.500  1.0
  Cr  Cr10  1  0.500  0.000  0.500  1.0
  Cr  Cr11  1  0.500  0.500  0.000  1.0
  Cr  Cr12  1  0.000  0.500  0.000  1.0
[/CIF]
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