The material described by Eu11Zn6Sb12 is Magnesium tetraboride-derived structured and crystallizes in the monoclinic C2/m space group. There are six inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 12-coordinate geometry to two equivalent Zn(2), two equivalent Zn(3), one Sb(1), one Sb(2), two equivalent Sb(4), and four equivalent Sb(5) atoms. In the second Eu site, Eu(2) is bonded in a 7-coordinate geometry to one Zn(1), one Sb(1), one Sb(2), two equivalent Sb(3), and two equivalent Sb(5) atoms. In the third Eu site, Eu(3) is bonded to one Sb(1), one Sb(2), two equivalent Sb(4), and two equivalent Sb(6) atoms to form EuSb6 octahedra that share corners with two equivalent Eu(6)Sb6 octahedra, edges with two equivalent Eu(3)Sb6 octahedra, edges with two equivalent Zn(2)Eu3Sb4 tetrahedra, and  a faceface with one Eu(6)Sb6 octahedra. The corner-sharing octahedral tilt angles are 50°. In the fourth Eu site, Eu(4) is bonded in a 6-coordinate geometry to three equivalent Zn(1), one Sb(1), two equivalent Sb(6), and three equivalent Sb(3) atoms. In the fifth Eu site, Eu(5) is bonded in a 9-coordinate geometry to one Zn(2), two equivalent Zn(1), one Sb(3), two equivalent Sb(2), and three equivalent Sb(6) atoms. In the sixth Eu site, Eu(6) is bonded to two equivalent Sb(1) and four equivalent Sb(4) atoms to form distorted EuSb6 octahedra that share corners with four equivalent Eu(3)Sb6 octahedra, corners with four equivalent Zn(2)Eu3Sb4 tetrahedra, edges with two equivalent Eu(6)Sb6 octahedra, and faces with two equivalent Eu(3)Sb6 octahedra. The corner-sharing octahedral tilt angles are 50°. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 10-coordinate geometry to one Eu(2), two equivalent Eu(5), three equivalent Eu(4), one Sb(2), one Sb(6), and two equivalent Sb(3) atoms. In the second Zn site, Zn(2) is bonded to one Eu(5), two equivalent Eu(1), one Sb(4), one Sb(5), and two equivalent Sb(2) atoms to form distorted ZnEu3Sb4 tetrahedra that share corners with two equivalent Eu(6)Sb6 octahedra, edges with two equivalent Eu(3)Sb6 octahedra, and edges with two equivalent Zn(2)Eu3Sb4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. In the third Zn site, Zn(3) is bonded in a 4-coordinate geometry to two equivalent Eu(1), one Sb(4), one Sb(5), and two equivalent Sb(1) atoms. There are six inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 6-coordinate geometry to one Eu(1), one Eu(2), one Eu(3), one Eu(4), one Eu(6), and two equivalent Zn(3) atoms. In the second Sb site, Sb(2) is bonded in a 7-coordinate geometry to one Eu(1), one Eu(2), one Eu(3), two equivalent Eu(5), one Zn(1), and two equivalent Zn(2) atoms. In the third Sb site, Sb(3) is bonded in a 8-coordinate geometry to one Eu(5), two equivalent Eu(2), three equivalent Eu(4), and two equivalent Zn(1) atoms. In the fourth Sb site, Sb(4) is bonded in a 8-coordinate geometry to two equivalent Eu(1), two equivalent Eu(3), two equivalent Eu(6), one Zn(2), and one Zn(3) atom. In the fifth Sb site, Sb(5) is bonded in a 9-coordinate geometry to two equivalent Eu(2), four equivalent Eu(1), one Zn(2), one Zn(3), and one Sb(5) atom. In the sixth Sb site, Sb(6) is bonded in a 8-coordinate geometry to two equivalent Eu(3), two equivalent Eu(4), three equivalent Eu(5), and one Zn(1) atom. is represented by the CIF file [CIF]
data_Eu11(ZnSb2)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.960
_cell_length_b   15.960
_cell_length_c   12.150
_cell_angle_alpha   70.537
_cell_angle_beta   70.537
_cell_angle_gamma   17.287
_symmetry_Int_Tables_number   1
_cell_volume   865.835
_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
  Eu  Eu0  1  0.018  0.018  0.323  1.0
  Eu  Eu1  1  0.982  0.982  0.677  1.0
  Eu  Eu2  1  0.114  0.114  0.490  1.0
  Eu  Eu3  1  0.886  0.886  0.510  1.0
  Eu  Eu4  1  0.126  0.126  0.980  1.0
  Eu  Eu5  1  0.874  0.874  0.020  1.0
  Eu  Eu6  1  0.200  0.200  0.653  1.0
  Eu  Eu7  1  0.800  0.800  0.347  1.0
  Eu  Eu8  1  0.281  0.281  0.861  1.0
  Eu  Eu9  1  0.719  0.719  0.139  1.0
  Eu  Eu10  1  0.000  0.000  0.000  1.0
  Zn  Zn11  1  0.217  0.217  0.328  1.0
  Zn  Zn12  1  0.783  0.783  0.672  1.0
  Zn  Zn13  1  0.401  0.401  0.743  1.0
  Zn  Zn14  1  0.599  0.599  0.257  1.0
  Zn  Zn15  1  0.545  0.545  0.756  1.0
  Zn  Zn16  1  0.455  0.455  0.244  1.0
  Sb  Sb17  1  0.087  0.087  0.765  1.0
  Sb  Sb18  1  0.913  0.913  0.235  1.0
  Sb  Sb19  1  0.147  0.147  0.216  1.0
  Sb  Sb20  1  0.853  0.853  0.784  1.0
  Sb  Sb21  1  0.308  0.308  0.540  1.0
  Sb  Sb22  1  0.692  0.692  0.460  1.0
  Sb  Sb23  1  0.453  0.453  0.883  1.0
  Sb  Sb24  1  0.547  0.547  0.117  1.0
  Sb  Sb25  1  0.454  0.454  0.502  1.0
  Sb  Sb26  1  0.546  0.546  0.498  1.0
  Sb  Sb27  1  0.705  0.705  0.860  1.0
  Sb  Sb28  1  0.295  0.295  0.140  1.0
[/CIF]
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The material described by Eu11Zn6Sb12 is Magnesium tetraboride-derived structured and crystallizes in the monoclinic C2/m space group. There are six inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 12-coordinate geometry to two equivalent Zn(2), two equivalent Zn(3), one Sb(1), one Sb(2), two equivalent Sb(4), and four equivalent Sb(5) atoms. In the second Eu site, Eu(2) is bonded in a 7-coordinate geometry to one Zn(1), one Sb(1), one Sb(2), two equivalent Sb(3), and two equivalent Sb(5) atoms. In the third Eu site, Eu(3) is bonded to one Sb(1), one Sb(2), two equivalent Sb(4), and two equivalent Sb(6) atoms to form EuSb6 octahedra that share corners with two equivalent Eu(6)Sb6 octahedra, edges with two equivalent Eu(3)Sb6 octahedra, edges with two equivalent Zn(2)Eu3Sb4 tetrahedra, and  a faceface with one Eu(6)Sb6 octahedra. The corner-sharing octahedral tilt angles are 50°. In the fourth Eu site, Eu(4) is bonded in a 6-coordinate geometry to three equivalent Zn(1), one Sb(1), two equivalent Sb(6), and three equivalent Sb(3) atoms. In the fifth Eu site, Eu(5) is bonded in a 9-coordinate geometry to one Zn(2), two equivalent Zn(1), one Sb(3), two equivalent Sb(2), and three equivalent Sb(6) atoms. In the sixth Eu site, Eu(6) is bonded to two equivalent Sb(1) and four equivalent Sb(4) atoms to form distorted EuSb6 octahedra that share corners with four equivalent Eu(3)Sb6 octahedra, corners with four equivalent Zn(2)Eu3Sb4 tetrahedra, edges with two equivalent Eu(6)Sb6 octahedra, and faces with two equivalent Eu(3)Sb6 octahedra. The corner-sharing octahedral tilt angles are 50°. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 10-coordinate geometry to one Eu(2), two equivalent Eu(5), three equivalent Eu(4), one Sb(2), one Sb(6), and two equivalent Sb(3) atoms. In the second Zn site, Zn(2) is bonded to one Eu(5), two equivalent Eu(1), one Sb(4), one Sb(5), and two equivalent Sb(2) atoms to form distorted ZnEu3Sb4 tetrahedra that share corners with two equivalent Eu(6)Sb6 octahedra, edges with two equivalent Eu(3)Sb6 octahedra, and edges with two equivalent Zn(2)Eu3Sb4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. In the third Zn site, Zn(3) is bonded in a 4-coordinate geometry to two equivalent Eu(1), one Sb(4), one Sb(5), and two equivalent Sb(1) atoms. There are six inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 6-coordinate geometry to one Eu(1), one Eu(2), one Eu(3), one Eu(4), one Eu(6), and two equivalent Zn(3) atoms. In the second Sb site, Sb(2) is bonded in a 7-coordinate geometry to one Eu(1), one Eu(2), one Eu(3), two equivalent Eu(5), one Zn(1), and two equivalent Zn(2) atoms. In the third Sb site, Sb(3) is bonded in a 8-coordinate geometry to one Eu(5), two equivalent Eu(2), three equivalent Eu(4), and two equivalent Zn(1) atoms. In the fourth Sb site, Sb(4) is bonded in a 8-coordinate geometry to two equivalent Eu(1), two equivalent Eu(3), two equivalent Eu(6), one Zn(2), and one Zn(3) atom. In the fifth Sb site, Sb(5) is bonded in a 9-coordinate geometry to two equivalent Eu(2), four equivalent Eu(1), one Zn(2), one Zn(3), and one Sb(5) atom. In the sixth Sb site, Sb(6) is bonded in a 8-coordinate geometry to two equivalent Eu(3), two equivalent Eu(4), three equivalent Eu(5), and one Zn(1) atom. is represented by the CIF file [CIF]
data_Eu11(ZnSb2)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.960
_cell_length_b   15.960
_cell_length_c   12.150
_cell_angle_alpha   70.537
_cell_angle_beta   70.537
_cell_angle_gamma   17.287
_symmetry_Int_Tables_number   1
_cell_volume   865.835
_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
  Eu  Eu0  1  0.018  0.018  0.323  1.0
  Eu  Eu1  1  0.982  0.982  0.677  1.0
  Eu  Eu2  1  0.114  0.114  0.490  1.0
  Eu  Eu3  1  0.886  0.886  0.510  1.0
  Eu  Eu4  1  0.126  0.126  0.980  1.0
  Eu  Eu5  1  0.874  0.874  0.020  1.0
  Eu  Eu6  1  0.200  0.200  0.653  1.0
  Eu  Eu7  1  0.800  0.800  0.347  1.0
  Eu  Eu8  1  0.281  0.281  0.861  1.0
  Eu  Eu9  1  0.719  0.719  0.139  1.0
  Eu  Eu10  1  0.000  0.000  0.000  1.0
  Zn  Zn11  1  0.217  0.217  0.328  1.0
  Zn  Zn12  1  0.783  0.783  0.672  1.0
  Zn  Zn13  1  0.401  0.401  0.743  1.0
  Zn  Zn14  1  0.599  0.599  0.257  1.0
  Zn  Zn15  1  0.545  0.545  0.756  1.0
  Zn  Zn16  1  0.455  0.455  0.244  1.0
  Sb  Sb17  1  0.087  0.087  0.765  1.0
  Sb  Sb18  1  0.913  0.913  0.235  1.0
  Sb  Sb19  1  0.147  0.147  0.216  1.0
  Sb  Sb20  1  0.853  0.853  0.784  1.0
  Sb  Sb21  1  0.308  0.308  0.540  1.0
  Sb  Sb22  1  0.692  0.692  0.460  1.0
  Sb  Sb23  1  0.453  0.453  0.883  1.0
  Sb  Sb24  1  0.547  0.547  0.117  1.0
  Sb  Sb25  1  0.454  0.454  0.502  1.0
  Sb  Sb26  1  0.546  0.546  0.498  1.0
  Sb  Sb27  1  0.705  0.705  0.860  1.0
  Sb  Sb28  1  0.295  0.295  0.140  1.0
[/CIF]
.