The crystal structure described by Nd2Zn15Ge2 crystallizes in the trigonal R-3m space group. Nd(1) is bonded in a 19-coordinate geometry to three equivalent Zn(1), six equivalent Zn(2), nine equivalent Zn(3), and one Ge(1) atom. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Nd(1), four equivalent Zn(2), four equivalent Zn(3), and two equivalent Ge(1) atoms to form distorted ZnNd2Zn8Ge2 cuboctahedra that share corners with four equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, corners with eight equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra, corners with ten equivalent Zn(3)Nd3Zn8Ge cuboctahedra, edges with four equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra, edges with six equivalent Zn(3)Nd3Zn8Ge cuboctahedra, faces with four equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, faces with six equivalent Zn(3)Nd3Zn8Ge cuboctahedra, and faces with eight equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra. In the second Zn site, Zn(2) is bonded to two equivalent Nd(1), two equivalent Zn(1), two equivalent Zn(2), four equivalent Zn(3), and two equivalent Ge(1) atoms to form distorted ZnNd2Zn8Ge2 cuboctahedra that share corners with four equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, corners with eight equivalent Zn(3)Nd3Zn8Ge cuboctahedra, corners with twelve equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra,  an edgeedge with one Zn(2)Nd2Zn8Ge2 cuboctahedra, edges with two equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, edges with two equivalent Zn(3)Nd3Zn8Ge cuboctahedra, faces with four equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, faces with seven equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra, and faces with ten equivalent Zn(3)Nd3Zn8Ge cuboctahedra. In the third Zn site, Zn(3) is bonded to three equivalent Nd(1), two equivalent Zn(1), two equivalent Zn(3), four equivalent Zn(2), and one Ge(1) atom to form distorted ZnNd3Zn8Ge cuboctahedra that share corners with five equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, corners with eight equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra, corners with ten equivalent Zn(3)Nd3Zn8Ge cuboctahedra, edges with two equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra, edges with three equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, edges with five equivalent Zn(3)Nd3Zn8Ge cuboctahedra, faces with three equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, faces with seven equivalent Zn(3)Nd3Zn8Ge cuboctahedra, and faces with ten equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra. Ge(1) is bonded in a 8-coordinate geometry to one Nd(1), three equivalent Zn(1), three equivalent Zn(3), six equivalent Zn(2), and one Ge(1) atom. is represented by the CIF card [CIF]
data_Nd2Zn15Ge2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.898
_cell_length_b   6.898
_cell_length_c   6.898
_cell_angle_alpha   84.887
_cell_angle_beta   84.887
_cell_angle_gamma   84.887
_symmetry_Int_Tables_number   1
_cell_volume   324.578
_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
  Nd  Nd0  1  0.334  0.334  0.334  1.0
  Nd  Nd1  1  0.666  0.666  0.666  1.0
  Zn  Zn2  1  0.000  0.000  0.500  1.0
  Zn  Zn3  1  0.000  0.500  0.000  1.0
  Zn  Zn4  1  0.500  0.000  0.000  1.0
  Zn  Zn5  1  0.691  0.309  0.000  1.0
  Zn  Zn6  1  0.309  0.000  0.691  1.0
  Zn  Zn7  1  0.000  0.691  0.309  1.0
  Zn  Zn8  1  0.309  0.691  0.000  1.0
  Zn  Zn9  1  0.691  0.000  0.309  1.0
  Zn  Zn10  1  0.000  0.309  0.691  1.0
  Zn  Zn11  1  0.171  0.648  0.648  1.0
  Zn  Zn12  1  0.648  0.648  0.171  1.0
  Zn  Zn13  1  0.648  0.171  0.648  1.0
  Zn  Zn14  1  0.352  0.829  0.352  1.0
  Zn  Zn15  1  0.829  0.352  0.352  1.0
  Zn  Zn16  1  0.352  0.352  0.829  1.0
  Ge  Ge17  1  0.099  0.099  0.099  1.0
  Ge  Ge18  1  0.901  0.901  0.901  1.0
[/CIF]
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The crystal structure described by Nd2Zn15Ge2 crystallizes in the trigonal R-3m space group. Nd(1) is bonded in a 19-coordinate geometry to three equivalent Zn(1), six equivalent Zn(2), nine equivalent Zn(3), and one Ge(1) atom. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Nd(1), four equivalent Zn(2), four equivalent Zn(3), and two equivalent Ge(1) atoms to form distorted ZnNd2Zn8Ge2 cuboctahedra that share corners with four equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, corners with eight equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra, corners with ten equivalent Zn(3)Nd3Zn8Ge cuboctahedra, edges with four equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra, edges with six equivalent Zn(3)Nd3Zn8Ge cuboctahedra, faces with four equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, faces with six equivalent Zn(3)Nd3Zn8Ge cuboctahedra, and faces with eight equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra. In the second Zn site, Zn(2) is bonded to two equivalent Nd(1), two equivalent Zn(1), two equivalent Zn(2), four equivalent Zn(3), and two equivalent Ge(1) atoms to form distorted ZnNd2Zn8Ge2 cuboctahedra that share corners with four equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, corners with eight equivalent Zn(3)Nd3Zn8Ge cuboctahedra, corners with twelve equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra,  an edgeedge with one Zn(2)Nd2Zn8Ge2 cuboctahedra, edges with two equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, edges with two equivalent Zn(3)Nd3Zn8Ge cuboctahedra, faces with four equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, faces with seven equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra, and faces with ten equivalent Zn(3)Nd3Zn8Ge cuboctahedra. In the third Zn site, Zn(3) is bonded to three equivalent Nd(1), two equivalent Zn(1), two equivalent Zn(3), four equivalent Zn(2), and one Ge(1) atom to form distorted ZnNd3Zn8Ge cuboctahedra that share corners with five equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, corners with eight equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra, corners with ten equivalent Zn(3)Nd3Zn8Ge cuboctahedra, edges with two equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra, edges with three equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, edges with five equivalent Zn(3)Nd3Zn8Ge cuboctahedra, faces with three equivalent Zn(1)Nd2Zn8Ge2 cuboctahedra, faces with seven equivalent Zn(3)Nd3Zn8Ge cuboctahedra, and faces with ten equivalent Zn(2)Nd2Zn8Ge2 cuboctahedra. Ge(1) is bonded in a 8-coordinate geometry to one Nd(1), three equivalent Zn(1), three equivalent Zn(3), six equivalent Zn(2), and one Ge(1) atom. is represented by the CIF card [CIF]
data_Nd2Zn15Ge2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.898
_cell_length_b   6.898
_cell_length_c   6.898
_cell_angle_alpha   84.887
_cell_angle_beta   84.887
_cell_angle_gamma   84.887
_symmetry_Int_Tables_number   1
_cell_volume   324.578
_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
  Nd  Nd0  1  0.334  0.334  0.334  1.0
  Nd  Nd1  1  0.666  0.666  0.666  1.0
  Zn  Zn2  1  0.000  0.000  0.500  1.0
  Zn  Zn3  1  0.000  0.500  0.000  1.0
  Zn  Zn4  1  0.500  0.000  0.000  1.0
  Zn  Zn5  1  0.691  0.309  0.000  1.0
  Zn  Zn6  1  0.309  0.000  0.691  1.0
  Zn  Zn7  1  0.000  0.691  0.309  1.0
  Zn  Zn8  1  0.309  0.691  0.000  1.0
  Zn  Zn9  1  0.691  0.000  0.309  1.0
  Zn  Zn10  1  0.000  0.309  0.691  1.0
  Zn  Zn11  1  0.171  0.648  0.648  1.0
  Zn  Zn12  1  0.648  0.648  0.171  1.0
  Zn  Zn13  1  0.648  0.171  0.648  1.0
  Zn  Zn14  1  0.352  0.829  0.352  1.0
  Zn  Zn15  1  0.829  0.352  0.352  1.0
  Zn  Zn16  1  0.352  0.352  0.829  1.0
  Ge  Ge17  1  0.099  0.099  0.099  1.0
  Ge  Ge18  1  0.901  0.901  0.901  1.0
[/CIF]
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