The material described by Ho2Zn17 crystallizes in the trigonal R-3m space group. Ho(1) is bonded in a 19-coordinate geometry to one Zn(2), three equivalent Zn(3), six equivalent Zn(4), and nine equivalent Zn(1) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to three equivalent Ho(1), one Zn(2), two equivalent Zn(1), two equivalent Zn(3), and four equivalent Zn(4) atoms to form distorted ZnHo3Zn9 cuboctahedra that share corners with five equivalent Zn(3)Ho2Zn10 cuboctahedra, corners with eight equivalent Zn(4)Ho2Zn10 cuboctahedra, corners with ten equivalent Zn(1)Ho3Zn9 cuboctahedra, edges with two equivalent Zn(4)Ho2Zn10 cuboctahedra, edges with three equivalent Zn(3)Ho2Zn10 cuboctahedra, edges with five equivalent Zn(1)Ho3Zn9 cuboctahedra, faces with three equivalent Zn(3)Ho2Zn10 cuboctahedra, faces with seven equivalent Zn(1)Ho3Zn9 cuboctahedra, and faces with ten equivalent Zn(4)Ho2Zn10 cuboctahedra. In the second Zn site, Zn(2) is bonded in a 14-coordinate geometry to one Ho(1), one Zn(2), three equivalent Zn(1), three equivalent Zn(3), and six equivalent Zn(4) atoms. In the third Zn site, Zn(3) is bonded to two equivalent Ho(1), two equivalent Zn(2), four equivalent Zn(1), and four equivalent Zn(4) atoms to form ZnHo2Zn10 cuboctahedra that share corners with four equivalent Zn(3)Ho2Zn10 cuboctahedra, corners with eight equivalent Zn(4)Ho2Zn10 cuboctahedra, corners with ten equivalent Zn(1)Ho3Zn9 cuboctahedra, edges with four equivalent Zn(4)Ho2Zn10 cuboctahedra, edges with six equivalent Zn(1)Ho3Zn9 cuboctahedra, faces with four equivalent Zn(3)Ho2Zn10 cuboctahedra, faces with six equivalent Zn(1)Ho3Zn9 cuboctahedra, and faces with eight equivalent Zn(4)Ho2Zn10 cuboctahedra. In the fourth Zn site, Zn(4) is bonded to two equivalent Ho(1), two equivalent Zn(2), two equivalent Zn(3), two equivalent Zn(4), and four equivalent Zn(1) atoms to form distorted ZnHo2Zn10 cuboctahedra that share corners with four equivalent Zn(3)Ho2Zn10 cuboctahedra, corners with eight equivalent Zn(1)Ho3Zn9 cuboctahedra, corners with twelve equivalent Zn(4)Ho2Zn10 cuboctahedra,  an edgeedge with one Zn(4)Ho2Zn10 cuboctahedra, edges with two equivalent Zn(3)Ho2Zn10 cuboctahedra, edges with two equivalent Zn(1)Ho3Zn9 cuboctahedra, faces with four equivalent Zn(3)Ho2Zn10 cuboctahedra, faces with seven equivalent Zn(4)Ho2Zn10 cuboctahedra, and faces with ten equivalent Zn(1)Ho3Zn9 cuboctahedra. is represented by the CIF card [CIF]
data_Ho2Zn17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.683
_cell_length_b   6.683
_cell_length_c   6.683
_cell_angle_alpha   82.900
_cell_angle_beta   82.900
_cell_angle_gamma   82.900
_symmetry_Int_Tables_number   1
_cell_volume   292.108
_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
  Ho  Ho0  1  0.664  0.664  0.664  1.0
  Ho  Ho1  1  0.336  0.336  0.336  1.0
  Zn  Zn2  1  0.351  0.351  0.839  1.0
  Zn  Zn3  1  0.351  0.839  0.351  1.0
  Zn  Zn4  1  0.100  0.100  0.100  1.0
  Zn  Zn5  1  0.900  0.900  0.900  1.0
  Zn  Zn6  1  0.000  0.000  0.500  1.0
  Zn  Zn7  1  0.500  0.000  0.000  1.0
  Zn  Zn8  1  0.000  0.500  0.000  1.0
  Zn  Zn9  1  0.703  0.297  0.000  1.0
  Zn  Zn10  1  0.000  0.703  0.297  1.0
  Zn  Zn11  1  0.297  0.000  0.703  1.0
  Zn  Zn12  1  0.297  0.703  0.000  1.0
  Zn  Zn13  1  0.000  0.297  0.703  1.0
  Zn  Zn14  1  0.703  0.000  0.297  1.0
  Zn  Zn15  1  0.649  0.161  0.649  1.0
  Zn  Zn16  1  0.649  0.649  0.161  1.0
  Zn  Zn17  1  0.161  0.649  0.649  1.0
  Zn  Zn18  1  0.839  0.351  0.351  1.0
[/CIF]
.
The material described by Ho2Zn17 crystallizes in the trigonal R-3m space group. Ho(1) is bonded in a 19-coordinate geometry to one Zn(2), three equivalent Zn(3), six equivalent Zn(4), and nine equivalent Zn(1) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to three equivalent Ho(1), one Zn(2), two equivalent Zn(1), two equivalent Zn(3), and four equivalent Zn(4) atoms to form distorted ZnHo3Zn9 cuboctahedra that share corners with five equivalent Zn(3)Ho2Zn10 cuboctahedra, corners with eight equivalent Zn(4)Ho2Zn10 cuboctahedra, corners with ten equivalent Zn(1)Ho3Zn9 cuboctahedra, edges with two equivalent Zn(4)Ho2Zn10 cuboctahedra, edges with three equivalent Zn(3)Ho2Zn10 cuboctahedra, edges with five equivalent Zn(1)Ho3Zn9 cuboctahedra, faces with three equivalent Zn(3)Ho2Zn10 cuboctahedra, faces with seven equivalent Zn(1)Ho3Zn9 cuboctahedra, and faces with ten equivalent Zn(4)Ho2Zn10 cuboctahedra. In the second Zn site, Zn(2) is bonded in a 14-coordinate geometry to one Ho(1), one Zn(2), three equivalent Zn(1), three equivalent Zn(3), and six equivalent Zn(4) atoms. In the third Zn site, Zn(3) is bonded to two equivalent Ho(1), two equivalent Zn(2), four equivalent Zn(1), and four equivalent Zn(4) atoms to form ZnHo2Zn10 cuboctahedra that share corners with four equivalent Zn(3)Ho2Zn10 cuboctahedra, corners with eight equivalent Zn(4)Ho2Zn10 cuboctahedra, corners with ten equivalent Zn(1)Ho3Zn9 cuboctahedra, edges with four equivalent Zn(4)Ho2Zn10 cuboctahedra, edges with six equivalent Zn(1)Ho3Zn9 cuboctahedra, faces with four equivalent Zn(3)Ho2Zn10 cuboctahedra, faces with six equivalent Zn(1)Ho3Zn9 cuboctahedra, and faces with eight equivalent Zn(4)Ho2Zn10 cuboctahedra. In the fourth Zn site, Zn(4) is bonded to two equivalent Ho(1), two equivalent Zn(2), two equivalent Zn(3), two equivalent Zn(4), and four equivalent Zn(1) atoms to form distorted ZnHo2Zn10 cuboctahedra that share corners with four equivalent Zn(3)Ho2Zn10 cuboctahedra, corners with eight equivalent Zn(1)Ho3Zn9 cuboctahedra, corners with twelve equivalent Zn(4)Ho2Zn10 cuboctahedra,  an edgeedge with one Zn(4)Ho2Zn10 cuboctahedra, edges with two equivalent Zn(3)Ho2Zn10 cuboctahedra, edges with two equivalent Zn(1)Ho3Zn9 cuboctahedra, faces with four equivalent Zn(3)Ho2Zn10 cuboctahedra, faces with seven equivalent Zn(4)Ho2Zn10 cuboctahedra, and faces with ten equivalent Zn(1)Ho3Zn9 cuboctahedra. is represented by the CIF card [CIF]
data_Ho2Zn17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.683
_cell_length_b   6.683
_cell_length_c   6.683
_cell_angle_alpha   82.900
_cell_angle_beta   82.900
_cell_angle_gamma   82.900
_symmetry_Int_Tables_number   1
_cell_volume   292.108
_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
  Ho  Ho0  1  0.664  0.664  0.664  1.0
  Ho  Ho1  1  0.336  0.336  0.336  1.0
  Zn  Zn2  1  0.351  0.351  0.839  1.0
  Zn  Zn3  1  0.351  0.839  0.351  1.0
  Zn  Zn4  1  0.100  0.100  0.100  1.0
  Zn  Zn5  1  0.900  0.900  0.900  1.0
  Zn  Zn6  1  0.000  0.000  0.500  1.0
  Zn  Zn7  1  0.500  0.000  0.000  1.0
  Zn  Zn8  1  0.000  0.500  0.000  1.0
  Zn  Zn9  1  0.703  0.297  0.000  1.0
  Zn  Zn10  1  0.000  0.703  0.297  1.0
  Zn  Zn11  1  0.297  0.000  0.703  1.0
  Zn  Zn12  1  0.297  0.703  0.000  1.0
  Zn  Zn13  1  0.000  0.297  0.703  1.0
  Zn  Zn14  1  0.703  0.000  0.297  1.0
  Zn  Zn15  1  0.649  0.161  0.649  1.0
  Zn  Zn16  1  0.649  0.649  0.161  1.0
  Zn  Zn17  1  0.161  0.649  0.649  1.0
  Zn  Zn18  1  0.839  0.351  0.351  1.0
[/CIF]
.