The crystal structure described by Th2Zn17 crystallizes in the trigonal R-3m space group. Th(1) is bonded in a 19-coordinate geometry to one Zn(4), three equivalent Zn(1), six equivalent Zn(2), and nine equivalent Zn(3) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Th(1), two equivalent Zn(4), four equivalent Zn(2), and four equivalent Zn(3) atoms to form distorted ZnTh2Zn10 cuboctahedra that share corners with four equivalent Zn(1)Th2Zn10 cuboctahedra, corners with eight equivalent Zn(2)Th2Zn10 cuboctahedra, corners with ten equivalent Zn(3)Th3Zn9 cuboctahedra, edges with four equivalent Zn(2)Th2Zn10 cuboctahedra, edges with six equivalent Zn(3)Th3Zn9 cuboctahedra, faces with four equivalent Zn(1)Th2Zn10 cuboctahedra, faces with six equivalent Zn(3)Th3Zn9 cuboctahedra, and faces with eight equivalent Zn(2)Th2Zn10 cuboctahedra. In the second Zn site, Zn(2) is bonded to two equivalent Th(1), two equivalent Zn(1), two equivalent Zn(2), two equivalent Zn(4), and four equivalent Zn(3) atoms to form distorted ZnTh2Zn10 cuboctahedra that share corners with four equivalent Zn(1)Th2Zn10 cuboctahedra, corners with eight equivalent Zn(3)Th3Zn9 cuboctahedra, corners with twelve equivalent Zn(2)Th2Zn10 cuboctahedra,  an edgeedge with one Zn(2)Th2Zn10 cuboctahedra, edges with two equivalent Zn(1)Th2Zn10 cuboctahedra, edges with two equivalent Zn(3)Th3Zn9 cuboctahedra, faces with four equivalent Zn(1)Th2Zn10 cuboctahedra, faces with seven equivalent Zn(2)Th2Zn10 cuboctahedra, and faces with ten equivalent Zn(3)Th3Zn9 cuboctahedra. In the third Zn site, Zn(3) is bonded to three equivalent Th(1), one Zn(4), two equivalent Zn(1), two equivalent Zn(3), and four equivalent Zn(2) atoms to form distorted ZnTh3Zn9 cuboctahedra that share corners with five equivalent Zn(1)Th2Zn10 cuboctahedra, corners with eight equivalent Zn(2)Th2Zn10 cuboctahedra, corners with ten equivalent Zn(3)Th3Zn9 cuboctahedra, edges with two equivalent Zn(2)Th2Zn10 cuboctahedra, edges with three equivalent Zn(1)Th2Zn10 cuboctahedra, edges with five equivalent Zn(3)Th3Zn9 cuboctahedra, faces with three equivalent Zn(1)Th2Zn10 cuboctahedra, faces with seven equivalent Zn(3)Th3Zn9 cuboctahedra, and faces with ten equivalent Zn(2)Th2Zn10 cuboctahedra. In the fourth Zn site, Zn(4) is bonded in a 14-coordinate geometry to one Th(1), one Zn(4), three equivalent Zn(1), three equivalent Zn(3), and six equivalent Zn(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Th2Zn17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.768
_cell_length_b   6.768
_cell_length_c   6.768
_cell_angle_alpha   82.879
_cell_angle_beta   82.879
_cell_angle_gamma   82.879
_symmetry_Int_Tables_number   1
_cell_volume   303.393
_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
  Th  Th0  1  0.338  0.338  0.338  1.0
  Th  Th1  1  0.662  0.662  0.662  1.0
  Zn  Zn2  1  0.000  0.000  0.500  1.0
  Zn  Zn3  1  0.500  0.000  0.000  1.0
  Zn  Zn4  1  0.000  0.500  0.000  1.0
  Zn  Zn5  1  0.291  0.709  0.000  1.0
  Zn  Zn6  1  0.000  0.291  0.709  1.0
  Zn  Zn7  1  0.709  0.000  0.291  1.0
  Zn  Zn8  1  0.709  0.291  0.000  1.0
  Zn  Zn9  1  0.000  0.709  0.291  1.0
  Zn  Zn10  1  0.291  0.000  0.709  1.0
  Zn  Zn11  1  0.650  0.161  0.650  1.0
  Zn  Zn12  1  0.650  0.650  0.161  1.0
  Zn  Zn13  1  0.161  0.650  0.650  1.0
  Zn  Zn14  1  0.839  0.350  0.350  1.0
  Zn  Zn15  1  0.350  0.839  0.350  1.0
  Zn  Zn16  1  0.350  0.350  0.839  1.0
  Zn  Zn17  1  0.099  0.099  0.099  1.0
  Zn  Zn18  1  0.901  0.901  0.901  1.0
[/CIF]
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The crystal structure described by Th2Zn17 crystallizes in the trigonal R-3m space group. Th(1) is bonded in a 19-coordinate geometry to one Zn(4), three equivalent Zn(1), six equivalent Zn(2), and nine equivalent Zn(3) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Th(1), two equivalent Zn(4), four equivalent Zn(2), and four equivalent Zn(3) atoms to form distorted ZnTh2Zn10 cuboctahedra that share corners with four equivalent Zn(1)Th2Zn10 cuboctahedra, corners with eight equivalent Zn(2)Th2Zn10 cuboctahedra, corners with ten equivalent Zn(3)Th3Zn9 cuboctahedra, edges with four equivalent Zn(2)Th2Zn10 cuboctahedra, edges with six equivalent Zn(3)Th3Zn9 cuboctahedra, faces with four equivalent Zn(1)Th2Zn10 cuboctahedra, faces with six equivalent Zn(3)Th3Zn9 cuboctahedra, and faces with eight equivalent Zn(2)Th2Zn10 cuboctahedra. In the second Zn site, Zn(2) is bonded to two equivalent Th(1), two equivalent Zn(1), two equivalent Zn(2), two equivalent Zn(4), and four equivalent Zn(3) atoms to form distorted ZnTh2Zn10 cuboctahedra that share corners with four equivalent Zn(1)Th2Zn10 cuboctahedra, corners with eight equivalent Zn(3)Th3Zn9 cuboctahedra, corners with twelve equivalent Zn(2)Th2Zn10 cuboctahedra,  an edgeedge with one Zn(2)Th2Zn10 cuboctahedra, edges with two equivalent Zn(1)Th2Zn10 cuboctahedra, edges with two equivalent Zn(3)Th3Zn9 cuboctahedra, faces with four equivalent Zn(1)Th2Zn10 cuboctahedra, faces with seven equivalent Zn(2)Th2Zn10 cuboctahedra, and faces with ten equivalent Zn(3)Th3Zn9 cuboctahedra. In the third Zn site, Zn(3) is bonded to three equivalent Th(1), one Zn(4), two equivalent Zn(1), two equivalent Zn(3), and four equivalent Zn(2) atoms to form distorted ZnTh3Zn9 cuboctahedra that share corners with five equivalent Zn(1)Th2Zn10 cuboctahedra, corners with eight equivalent Zn(2)Th2Zn10 cuboctahedra, corners with ten equivalent Zn(3)Th3Zn9 cuboctahedra, edges with two equivalent Zn(2)Th2Zn10 cuboctahedra, edges with three equivalent Zn(1)Th2Zn10 cuboctahedra, edges with five equivalent Zn(3)Th3Zn9 cuboctahedra, faces with three equivalent Zn(1)Th2Zn10 cuboctahedra, faces with seven equivalent Zn(3)Th3Zn9 cuboctahedra, and faces with ten equivalent Zn(2)Th2Zn10 cuboctahedra. In the fourth Zn site, Zn(4) is bonded in a 14-coordinate geometry to one Th(1), one Zn(4), three equivalent Zn(1), three equivalent Zn(3), and six equivalent Zn(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Th2Zn17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.768
_cell_length_b   6.768
_cell_length_c   6.768
_cell_angle_alpha   82.879
_cell_angle_beta   82.879
_cell_angle_gamma   82.879
_symmetry_Int_Tables_number   1
_cell_volume   303.393
_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
  Th  Th0  1  0.338  0.338  0.338  1.0
  Th  Th1  1  0.662  0.662  0.662  1.0
  Zn  Zn2  1  0.000  0.000  0.500  1.0
  Zn  Zn3  1  0.500  0.000  0.000  1.0
  Zn  Zn4  1  0.000  0.500  0.000  1.0
  Zn  Zn5  1  0.291  0.709  0.000  1.0
  Zn  Zn6  1  0.000  0.291  0.709  1.0
  Zn  Zn7  1  0.709  0.000  0.291  1.0
  Zn  Zn8  1  0.709  0.291  0.000  1.0
  Zn  Zn9  1  0.000  0.709  0.291  1.0
  Zn  Zn10  1  0.291  0.000  0.709  1.0
  Zn  Zn11  1  0.650  0.161  0.650  1.0
  Zn  Zn12  1  0.650  0.650  0.161  1.0
  Zn  Zn13  1  0.161  0.650  0.650  1.0
  Zn  Zn14  1  0.839  0.350  0.350  1.0
  Zn  Zn15  1  0.350  0.839  0.350  1.0
  Zn  Zn16  1  0.350  0.350  0.839  1.0
  Zn  Zn17  1  0.099  0.099  0.099  1.0
  Zn  Zn18  1  0.901  0.901  0.901  1.0
[/CIF]
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