The compound described by Gd2Zn17 crystallizes in the trigonal R-3m space group. Gd(1) is bonded in a 19-coordinate geometry to one Zn(4), three equivalent Zn(3), six equivalent Zn(2), and nine equivalent Zn(1) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to three equivalent Gd(1), one Zn(4), two equivalent Zn(1), two equivalent Zn(3), and four equivalent Zn(2) atoms to form distorted ZnGd3Zn9 cuboctahedra that share corners with five equivalent Zn(3)Gd2Zn10 cuboctahedra, corners with eight equivalent Zn(2)Gd2Zn10 cuboctahedra, corners with ten equivalent Zn(1)Gd3Zn9 cuboctahedra, edges with two equivalent Zn(2)Gd2Zn10 cuboctahedra, edges with three equivalent Zn(3)Gd2Zn10 cuboctahedra, edges with five equivalent Zn(1)Gd3Zn9 cuboctahedra, faces with three equivalent Zn(3)Gd2Zn10 cuboctahedra, faces with seven equivalent Zn(1)Gd3Zn9 cuboctahedra, and faces with ten equivalent Zn(2)Gd2Zn10 cuboctahedra. In the second Zn site, Zn(2) is bonded to two equivalent Gd(1), two equivalent Zn(2), two equivalent Zn(3), two equivalent Zn(4), and four equivalent Zn(1) atoms to form distorted ZnGd2Zn10 cuboctahedra that share corners with four equivalent Zn(3)Gd2Zn10 cuboctahedra, corners with eight equivalent Zn(1)Gd3Zn9 cuboctahedra, corners with twelve equivalent Zn(2)Gd2Zn10 cuboctahedra,  an edgeedge with one Zn(2)Gd2Zn10 cuboctahedra, edges with two equivalent Zn(3)Gd2Zn10 cuboctahedra, edges with two equivalent Zn(1)Gd3Zn9 cuboctahedra, faces with four equivalent Zn(3)Gd2Zn10 cuboctahedra, faces with seven equivalent Zn(2)Gd2Zn10 cuboctahedra, and faces with ten equivalent Zn(1)Gd3Zn9 cuboctahedra. In the third Zn site, Zn(3) is bonded to two equivalent Gd(1), two equivalent Zn(4), four equivalent Zn(1), and four equivalent Zn(2) atoms to form ZnGd2Zn10 cuboctahedra that share corners with four equivalent Zn(3)Gd2Zn10 cuboctahedra, corners with eight equivalent Zn(2)Gd2Zn10 cuboctahedra, corners with ten equivalent Zn(1)Gd3Zn9 cuboctahedra, edges with four equivalent Zn(2)Gd2Zn10 cuboctahedra, edges with six equivalent Zn(1)Gd3Zn9 cuboctahedra, faces with four equivalent Zn(3)Gd2Zn10 cuboctahedra, faces with six equivalent Zn(1)Gd3Zn9 cuboctahedra, and faces with eight equivalent Zn(2)Gd2Zn10 cuboctahedra. In the fourth Zn site, Zn(4) is bonded in a 14-coordinate geometry to one Gd(1), one Zn(4), three equivalent Zn(1), three equivalent Zn(3), and six equivalent Zn(2) atoms. is represented by the CIF file [CIF]
data_Gd2Zn17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.716
_cell_length_b   6.716
_cell_length_c   6.716
_cell_angle_alpha   82.921
_cell_angle_beta   82.922
_cell_angle_gamma   82.921
_symmetry_Int_Tables_number   1
_cell_volume   296.530
_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
  Gd  Gd0  1  0.664  0.664  0.664  1.0
  Gd  Gd1  1  0.336  0.336  0.336  1.0
  Zn  Zn2  1  0.350  0.350  0.839  1.0
  Zn  Zn3  1  0.294  0.706  1.000  1.0
  Zn  Zn4  1  0.000  0.294  0.706  1.0
  Zn  Zn5  1  0.350  0.839  0.350  1.0
  Zn  Zn6  1  0.650  0.650  0.161  1.0
  Zn  Zn7  1  0.839  0.350  0.350  1.0
  Zn  Zn8  1  0.706  1.000  0.294  1.0
  Zn  Zn9  1  0.161  0.650  0.650  1.0
  Zn  Zn10  1  0.650  0.161  0.650  1.0
  Zn  Zn11  1  0.000  0.000  0.500  1.0
  Zn  Zn12  1  0.706  0.294  0.000  1.0
  Zn  Zn13  1  0.099  0.099  0.099  1.0
  Zn  Zn14  1  1.000  0.706  0.294  1.0
  Zn  Zn15  1  0.000  0.500  1.000  1.0
  Zn  Zn16  1  0.901  0.901  0.901  1.0
  Zn  Zn17  1  0.500  0.000  1.000  1.0
  Zn  Zn18  1  0.294  1.000  0.706  1.0
[/CIF]
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The compound described by Gd2Zn17 crystallizes in the trigonal R-3m space group. Gd(1) is bonded in a 19-coordinate geometry to one Zn(4), three equivalent Zn(3), six equivalent Zn(2), and nine equivalent Zn(1) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to three equivalent Gd(1), one Zn(4), two equivalent Zn(1), two equivalent Zn(3), and four equivalent Zn(2) atoms to form distorted ZnGd3Zn9 cuboctahedra that share corners with five equivalent Zn(3)Gd2Zn10 cuboctahedra, corners with eight equivalent Zn(2)Gd2Zn10 cuboctahedra, corners with ten equivalent Zn(1)Gd3Zn9 cuboctahedra, edges with two equivalent Zn(2)Gd2Zn10 cuboctahedra, edges with three equivalent Zn(3)Gd2Zn10 cuboctahedra, edges with five equivalent Zn(1)Gd3Zn9 cuboctahedra, faces with three equivalent Zn(3)Gd2Zn10 cuboctahedra, faces with seven equivalent Zn(1)Gd3Zn9 cuboctahedra, and faces with ten equivalent Zn(2)Gd2Zn10 cuboctahedra. In the second Zn site, Zn(2) is bonded to two equivalent Gd(1), two equivalent Zn(2), two equivalent Zn(3), two equivalent Zn(4), and four equivalent Zn(1) atoms to form distorted ZnGd2Zn10 cuboctahedra that share corners with four equivalent Zn(3)Gd2Zn10 cuboctahedra, corners with eight equivalent Zn(1)Gd3Zn9 cuboctahedra, corners with twelve equivalent Zn(2)Gd2Zn10 cuboctahedra,  an edgeedge with one Zn(2)Gd2Zn10 cuboctahedra, edges with two equivalent Zn(3)Gd2Zn10 cuboctahedra, edges with two equivalent Zn(1)Gd3Zn9 cuboctahedra, faces with four equivalent Zn(3)Gd2Zn10 cuboctahedra, faces with seven equivalent Zn(2)Gd2Zn10 cuboctahedra, and faces with ten equivalent Zn(1)Gd3Zn9 cuboctahedra. In the third Zn site, Zn(3) is bonded to two equivalent Gd(1), two equivalent Zn(4), four equivalent Zn(1), and four equivalent Zn(2) atoms to form ZnGd2Zn10 cuboctahedra that share corners with four equivalent Zn(3)Gd2Zn10 cuboctahedra, corners with eight equivalent Zn(2)Gd2Zn10 cuboctahedra, corners with ten equivalent Zn(1)Gd3Zn9 cuboctahedra, edges with four equivalent Zn(2)Gd2Zn10 cuboctahedra, edges with six equivalent Zn(1)Gd3Zn9 cuboctahedra, faces with four equivalent Zn(3)Gd2Zn10 cuboctahedra, faces with six equivalent Zn(1)Gd3Zn9 cuboctahedra, and faces with eight equivalent Zn(2)Gd2Zn10 cuboctahedra. In the fourth Zn site, Zn(4) is bonded in a 14-coordinate geometry to one Gd(1), one Zn(4), three equivalent Zn(1), three equivalent Zn(3), and six equivalent Zn(2) atoms. is represented by the CIF file [CIF]
data_Gd2Zn17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.716
_cell_length_b   6.716
_cell_length_c   6.716
_cell_angle_alpha   82.921
_cell_angle_beta   82.922
_cell_angle_gamma   82.921
_symmetry_Int_Tables_number   1
_cell_volume   296.530
_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
  Gd  Gd0  1  0.664  0.664  0.664  1.0
  Gd  Gd1  1  0.336  0.336  0.336  1.0
  Zn  Zn2  1  0.350  0.350  0.839  1.0
  Zn  Zn3  1  0.294  0.706  1.000  1.0
  Zn  Zn4  1  0.000  0.294  0.706  1.0
  Zn  Zn5  1  0.350  0.839  0.350  1.0
  Zn  Zn6  1  0.650  0.650  0.161  1.0
  Zn  Zn7  1  0.839  0.350  0.350  1.0
  Zn  Zn8  1  0.706  1.000  0.294  1.0
  Zn  Zn9  1  0.161  0.650  0.650  1.0
  Zn  Zn10  1  0.650  0.161  0.650  1.0
  Zn  Zn11  1  0.000  0.000  0.500  1.0
  Zn  Zn12  1  0.706  0.294  0.000  1.0
  Zn  Zn13  1  0.099  0.099  0.099  1.0
  Zn  Zn14  1  1.000  0.706  0.294  1.0
  Zn  Zn15  1  0.000  0.500  1.000  1.0
  Zn  Zn16  1  0.901  0.901  0.901  1.0
  Zn  Zn17  1  0.500  0.000  1.000  1.0
  Zn  Zn18  1  0.294  1.000  0.706  1.0
[/CIF]
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