The structure described by Cr(Fe2Sb5)2 crystallizes in the monoclinic P2/m space group. Cr(1) is bonded to one Sb(1), one Sb(2), two equivalent Sb(6), and two equivalent Sb(7) atoms to form CrSb6 octahedra that share corners with four equivalent Fe(3)Sb6 octahedra, corners with four equivalent Fe(4)Sb6 octahedra, and edges with two equivalent Cr(1)Sb6 octahedra. The corner-sharing octahedral tilt angles range from 50-52°. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one Sb(3), one Sb(5), two equivalent Sb(10), and two equivalent Sb(8) atoms to form a mixture of edge and corner-sharing FeSb6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. In the second Fe site, Fe(2) is bonded to two equivalent Sb(4) and four equivalent Sb(9) atoms to form a mixture of edge and corner-sharing FeSb6 octahedra. The corner-sharing octahedral tilt angles are 50°. In the third Fe site, Fe(3) is bonded to one Sb(6), one Sb(8), two equivalent Sb(1), and two equivalent Sb(3) atoms to form FeSb6 octahedra that share corners with four equivalent Cr(1)Sb6 octahedra, corners with four equivalent Fe(1)Sb6 octahedra, and edges with two equivalent Fe(3)Sb6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. In the fourth Fe site, Fe(4) is bonded to two equivalent Sb(7) and four equivalent Sb(2) atoms to form FeSb6 octahedra that share corners with eight equivalent Cr(1)Sb6 octahedra and edges with two equivalent Fe(4)Sb6 octahedra. The corner-sharing octahedral tilt angles range from 50-52°. In the fifth Fe site, Fe(5) is bonded to one Sb(10), one Sb(9), two equivalent Sb(4), and two equivalent Sb(5) atoms to form a mixture of edge and corner-sharing FeSb6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. There are ten inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 3-coordinate geometry to one Cr(1) and two equivalent Fe(3) atoms. In the second Sb site, Sb(2) is bonded in a 3-coordinate geometry to one Cr(1) and two equivalent Fe(4) atoms. In the third Sb site, Sb(3) is bonded in a 3-coordinate geometry to one Fe(1) and two equivalent Fe(3) atoms. In the fourth Sb site, Sb(4) is bonded in a 3-coordinate geometry to one Fe(2) and two equivalent Fe(5) atoms. In the fifth Sb site, Sb(5) is bonded in a 3-coordinate geometry to one Fe(1) and two equivalent Fe(5) atoms. In the sixth Sb site, Sb(6) is bonded in a 3-coordinate geometry to two equivalent Cr(1) and one Fe(3) atom. In the seventh Sb site, Sb(7) is bonded in a 3-coordinate geometry to two equivalent Cr(1) and one Fe(4) atom. In the eighth Sb site, Sb(8) is bonded in a 3-coordinate geometry to one Fe(3) and two equivalent Fe(1) atoms. In the ninth Sb site, Sb(9) is bonded in a 3-coordinate geometry to one Fe(5) and two equivalent Fe(2) atoms. In the tenth Sb site, Sb(10) is bonded in a 3-coordinate geometry to one Fe(5) and two equivalent Fe(1) atoms. is represented by the CIF file [CIF]
data_Cr(Fe2Sb5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.183
_cell_length_b   5.906
_cell_length_c   33.008
_cell_angle_alpha   90.016
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   620.416
_cell_formula_units_Z   2
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
  Cr  Cr0  1  0.500  0.500  0.100  1.0
  Cr  Cr1  1  0.500  0.500  0.300  1.0
  Fe  Fe2  1  0.500  0.500  0.500  1.0
  Fe  Fe3  1  0.500  0.500  0.700  1.0
  Fe  Fe4  1  0.500  0.500  0.900  1.0
  Fe  Fe5  1  0.000  0.999  0.999  1.0
  Fe  Fe6  1  0.000  0.000  0.200  1.0
  Fe  Fe7  1  0.000  0.001  0.401  1.0
  Fe  Fe8  1  0.000  0.000  0.600  1.0
  Fe  Fe9  1  0.000  1.000  0.800  1.0
  Sb  Sb10  1  0.500  0.695  0.027  1.0
  Sb  Sb11  1  0.500  0.695  0.227  1.0
  Sb  Sb12  1  0.500  0.691  0.430  1.0
  Sb  Sb13  1  0.500  0.691  0.629  1.0
  Sb  Sb14  1  0.500  0.691  0.829  1.0
  Sb  Sb15  1  0.500  0.305  0.173  1.0
  Sb  Sb16  1  0.500  0.305  0.373  1.0
  Sb  Sb17  1  0.500  0.309  0.571  1.0
  Sb  Sb18  1  0.500  0.309  0.771  1.0
  Sb  Sb19  1  0.500  0.309  0.970  1.0
  Sb  Sb20  1  0.000  0.178  0.069  1.0
  Sb  Sb21  1  0.000  0.178  0.270  1.0
  Sb  Sb22  1  0.000  0.191  0.472  1.0
  Sb  Sb23  1  0.000  0.191  0.671  1.0
  Sb  Sb24  1  0.000  0.191  0.871  1.0
  Sb  Sb25  1  0.000  0.822  0.130  1.0
  Sb  Sb26  1  0.000  0.822  0.331  1.0
  Sb  Sb27  1  0.000  0.809  0.529  1.0
  Sb  Sb28  1  0.000  0.809  0.729  1.0
  Sb  Sb29  1  0.000  0.809  0.928  1.0
[/CIF]
.
The structure described by Cr(Fe2Sb5)2 crystallizes in the monoclinic P2/m space group. Cr(1) is bonded to one Sb(1), one Sb(2), two equivalent Sb(6), and two equivalent Sb(7) atoms to form CrSb6 octahedra that share corners with four equivalent Fe(3)Sb6 octahedra, corners with four equivalent Fe(4)Sb6 octahedra, and edges with two equivalent Cr(1)Sb6 octahedra. The corner-sharing octahedral tilt angles range from 50-52°. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one Sb(3), one Sb(5), two equivalent Sb(10), and two equivalent Sb(8) atoms to form a mixture of edge and corner-sharing FeSb6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. In the second Fe site, Fe(2) is bonded to two equivalent Sb(4) and four equivalent Sb(9) atoms to form a mixture of edge and corner-sharing FeSb6 octahedra. The corner-sharing octahedral tilt angles are 50°. In the third Fe site, Fe(3) is bonded to one Sb(6), one Sb(8), two equivalent Sb(1), and two equivalent Sb(3) atoms to form FeSb6 octahedra that share corners with four equivalent Cr(1)Sb6 octahedra, corners with four equivalent Fe(1)Sb6 octahedra, and edges with two equivalent Fe(3)Sb6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. In the fourth Fe site, Fe(4) is bonded to two equivalent Sb(7) and four equivalent Sb(2) atoms to form FeSb6 octahedra that share corners with eight equivalent Cr(1)Sb6 octahedra and edges with two equivalent Fe(4)Sb6 octahedra. The corner-sharing octahedral tilt angles range from 50-52°. In the fifth Fe site, Fe(5) is bonded to one Sb(10), one Sb(9), two equivalent Sb(4), and two equivalent Sb(5) atoms to form a mixture of edge and corner-sharing FeSb6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. There are ten inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 3-coordinate geometry to one Cr(1) and two equivalent Fe(3) atoms. In the second Sb site, Sb(2) is bonded in a 3-coordinate geometry to one Cr(1) and two equivalent Fe(4) atoms. In the third Sb site, Sb(3) is bonded in a 3-coordinate geometry to one Fe(1) and two equivalent Fe(3) atoms. In the fourth Sb site, Sb(4) is bonded in a 3-coordinate geometry to one Fe(2) and two equivalent Fe(5) atoms. In the fifth Sb site, Sb(5) is bonded in a 3-coordinate geometry to one Fe(1) and two equivalent Fe(5) atoms. In the sixth Sb site, Sb(6) is bonded in a 3-coordinate geometry to two equivalent Cr(1) and one Fe(3) atom. In the seventh Sb site, Sb(7) is bonded in a 3-coordinate geometry to two equivalent Cr(1) and one Fe(4) atom. In the eighth Sb site, Sb(8) is bonded in a 3-coordinate geometry to one Fe(3) and two equivalent Fe(1) atoms. In the ninth Sb site, Sb(9) is bonded in a 3-coordinate geometry to one Fe(5) and two equivalent Fe(2) atoms. In the tenth Sb site, Sb(10) is bonded in a 3-coordinate geometry to one Fe(5) and two equivalent Fe(1) atoms. is represented by the CIF file [CIF]
data_Cr(Fe2Sb5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.183
_cell_length_b   5.906
_cell_length_c   33.008
_cell_angle_alpha   90.016
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   620.416
_cell_formula_units_Z   2
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
  Cr  Cr0  1  0.500  0.500  0.100  1.0
  Cr  Cr1  1  0.500  0.500  0.300  1.0
  Fe  Fe2  1  0.500  0.500  0.500  1.0
  Fe  Fe3  1  0.500  0.500  0.700  1.0
  Fe  Fe4  1  0.500  0.500  0.900  1.0
  Fe  Fe5  1  0.000  0.999  0.999  1.0
  Fe  Fe6  1  0.000  0.000  0.200  1.0
  Fe  Fe7  1  0.000  0.001  0.401  1.0
  Fe  Fe8  1  0.000  0.000  0.600  1.0
  Fe  Fe9  1  0.000  1.000  0.800  1.0
  Sb  Sb10  1  0.500  0.695  0.027  1.0
  Sb  Sb11  1  0.500  0.695  0.227  1.0
  Sb  Sb12  1  0.500  0.691  0.430  1.0
  Sb  Sb13  1  0.500  0.691  0.629  1.0
  Sb  Sb14  1  0.500  0.691  0.829  1.0
  Sb  Sb15  1  0.500  0.305  0.173  1.0
  Sb  Sb16  1  0.500  0.305  0.373  1.0
  Sb  Sb17  1  0.500  0.309  0.571  1.0
  Sb  Sb18  1  0.500  0.309  0.771  1.0
  Sb  Sb19  1  0.500  0.309  0.970  1.0
  Sb  Sb20  1  0.000  0.178  0.069  1.0
  Sb  Sb21  1  0.000  0.178  0.270  1.0
  Sb  Sb22  1  0.000  0.191  0.472  1.0
  Sb  Sb23  1  0.000  0.191  0.671  1.0
  Sb  Sb24  1  0.000  0.191  0.871  1.0
  Sb  Sb25  1  0.000  0.822  0.130  1.0
  Sb  Sb26  1  0.000  0.822  0.331  1.0
  Sb  Sb27  1  0.000  0.809  0.529  1.0
  Sb  Sb28  1  0.000  0.809  0.729  1.0
  Sb  Sb29  1  0.000  0.809  0.928  1.0
[/CIF]
.