The structure described by Nd4O4(GeO4) crystallizes in the orthorhombic Pnma space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and two equivalent O(5) atoms. In the second Nd site, Nd(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), and four equivalent O(4) atoms. In the third Nd site, Nd(3) is bonded to one O(1), one O(3), one O(6), and four equivalent O(5) atoms to form distorted NdO7 pentagonal bipyramids that share  a cornercorner with one Ge(1)O4 tetrahedra and edges with two equivalent Nd(3)O7 pentagonal bipyramids. Ge(1) is bonded to one O(2), one O(6), and two equivalent O(4) atoms to form GeO4 tetrahedra that share  a cornercorner with one Nd(3)O7 pentagonal bipyramid. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Nd(2), one Nd(3), and two equivalent Nd(1) atoms to form ONd4 tetrahedra that share corners with four equivalent O(5)Nd4 tetrahedra, corners with three equivalent O(2)Nd3Ge trigonal pyramids, edges with two equivalent O(3)Nd4 tetrahedra, and edges with two equivalent O(5)Nd4 tetrahedra. In the second O site, O(2) is bonded to one Nd(2), two equivalent Nd(1), and one Ge(1) atom to form distorted corner-sharing ONd3Ge trigonal pyramids. In the third O site, O(3) is bonded to one Nd(2), one Nd(3), and two equivalent Nd(1) atoms to form ONd4 tetrahedra that share corners with four equivalent O(5)Nd4 tetrahedra, corners with three equivalent O(2)Nd3Ge trigonal pyramids, edges with two equivalent O(1)Nd4 tetrahedra, and edges with two equivalent O(5)Nd4 tetrahedra. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Nd(1), two equivalent Nd(2), and one Ge(1) atom. In the fifth O site, O(5) is bonded to two equivalent Nd(1) and two equivalent Nd(3) atoms to form ONd4 tetrahedra that share corners with two equivalent O(1)Nd4 tetrahedra, corners with two equivalent O(3)Nd4 tetrahedra, corners with four equivalent O(5)Nd4 tetrahedra, corners with two equivalent O(2)Nd3Ge trigonal pyramids,  an edgeedge with one O(1)Nd4 tetrahedra,  an edgeedge with one O(3)Nd4 tetrahedra, and edges with two equivalent O(5)Nd4 tetrahedra. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Nd(3), two equivalent Nd(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_Nd4GeO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.752
_cell_length_b   7.483
_cell_length_c   18.052
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   777.066
_cell_formula_units_Z   4
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  0.023  0.491  0.397  1.0
  Nd  Nd1  1  0.458  0.750  0.718  1.0
  Nd  Nd2  1  0.481  0.750  0.514  1.0
  Nd  Nd3  1  0.523  0.991  0.103  1.0
  Nd  Nd4  1  0.958  0.250  0.782  1.0
  Nd  Nd5  1  0.977  0.509  0.603  1.0
  Nd  Nd6  1  0.477  0.009  0.897  1.0
  Nd  Nd7  1  0.977  0.991  0.603  1.0
  Nd  Nd8  1  0.981  0.250  0.986  1.0
  Nd  Nd9  1  0.477  0.491  0.897  1.0
  Nd  Nd10  1  0.019  0.750  0.014  1.0
  Nd  Nd11  1  0.542  0.250  0.282  1.0
  Nd  Nd12  1  0.042  0.750  0.218  1.0
  Nd  Nd13  1  0.023  0.009  0.397  1.0
  Nd  Nd14  1  0.523  0.509  0.103  1.0
  Nd  Nd15  1  0.519  0.250  0.486  1.0
  Ge  Ge16  1  0.509  0.750  0.309  1.0
  Ge  Ge17  1  0.491  0.250  0.691  1.0
  Ge  Ge18  1  0.009  0.250  0.191  1.0
  Ge  Ge19  1  0.991  0.750  0.809  1.0
  O  O20  1  0.222  0.250  0.874  1.0
  O  O21  1  0.198  0.250  0.662  1.0
  O  O22  1  0.271  0.750  0.116  1.0
  O  O23  1  0.425  0.939  0.256  1.0
  O  O24  1  0.759  0.981  0.494  1.0
  O  O25  1  0.229  0.750  0.616  1.0
  O  O26  1  0.259  0.019  0.006  1.0
  O  O27  1  0.693  0.250  0.616  1.0
  O  O28  1  0.278  0.250  0.374  1.0
  O  O29  1  0.241  0.019  0.506  1.0
  O  O30  1  0.771  0.250  0.384  1.0
  O  O31  1  0.075  0.561  0.756  1.0
  O  O32  1  0.307  0.750  0.384  1.0
  O  O33  1  0.722  0.750  0.626  1.0
  O  O34  1  0.575  0.439  0.744  1.0
  O  O35  1  0.741  0.981  0.994  1.0
  O  O36  1  0.741  0.519  0.994  1.0
  O  O37  1  0.425  0.561  0.256  1.0
  O  O38  1  0.729  0.250  0.884  1.0
  O  O39  1  0.075  0.939  0.756  1.0
  O  O40  1  0.698  0.750  0.838  1.0
  O  O41  1  0.241  0.481  0.506  1.0
  O  O42  1  0.759  0.519  0.494  1.0
  O  O43  1  0.925  0.061  0.244  1.0
  O  O44  1  0.193  0.750  0.884  1.0
  O  O45  1  0.778  0.750  0.126  1.0
  O  O46  1  0.807  0.250  0.116  1.0
  O  O47  1  0.925  0.439  0.244  1.0
  O  O48  1  0.802  0.750  0.338  1.0
  O  O49  1  0.259  0.481  0.006  1.0
  O  O50  1  0.575  0.061  0.744  1.0
  O  O51  1  0.302  0.250  0.162  1.0
[/CIF]
.
The structure described by Nd4O4(GeO4) crystallizes in the orthorhombic Pnma space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and two equivalent O(5) atoms. In the second Nd site, Nd(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), and four equivalent O(4) atoms. In the third Nd site, Nd(3) is bonded to one O(1), one O(3), one O(6), and four equivalent O(5) atoms to form distorted NdO7 pentagonal bipyramids that share  a cornercorner with one Ge(1)O4 tetrahedra and edges with two equivalent Nd(3)O7 pentagonal bipyramids. Ge(1) is bonded to one O(2), one O(6), and two equivalent O(4) atoms to form GeO4 tetrahedra that share  a cornercorner with one Nd(3)O7 pentagonal bipyramid. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Nd(2), one Nd(3), and two equivalent Nd(1) atoms to form ONd4 tetrahedra that share corners with four equivalent O(5)Nd4 tetrahedra, corners with three equivalent O(2)Nd3Ge trigonal pyramids, edges with two equivalent O(3)Nd4 tetrahedra, and edges with two equivalent O(5)Nd4 tetrahedra. In the second O site, O(2) is bonded to one Nd(2), two equivalent Nd(1), and one Ge(1) atom to form distorted corner-sharing ONd3Ge trigonal pyramids. In the third O site, O(3) is bonded to one Nd(2), one Nd(3), and two equivalent Nd(1) atoms to form ONd4 tetrahedra that share corners with four equivalent O(5)Nd4 tetrahedra, corners with three equivalent O(2)Nd3Ge trigonal pyramids, edges with two equivalent O(1)Nd4 tetrahedra, and edges with two equivalent O(5)Nd4 tetrahedra. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Nd(1), two equivalent Nd(2), and one Ge(1) atom. In the fifth O site, O(5) is bonded to two equivalent Nd(1) and two equivalent Nd(3) atoms to form ONd4 tetrahedra that share corners with two equivalent O(1)Nd4 tetrahedra, corners with two equivalent O(3)Nd4 tetrahedra, corners with four equivalent O(5)Nd4 tetrahedra, corners with two equivalent O(2)Nd3Ge trigonal pyramids,  an edgeedge with one O(1)Nd4 tetrahedra,  an edgeedge with one O(3)Nd4 tetrahedra, and edges with two equivalent O(5)Nd4 tetrahedra. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Nd(3), two equivalent Nd(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_Nd4GeO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.752
_cell_length_b   7.483
_cell_length_c   18.052
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   777.066
_cell_formula_units_Z   4
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  0.023  0.491  0.397  1.0
  Nd  Nd1  1  0.458  0.750  0.718  1.0
  Nd  Nd2  1  0.481  0.750  0.514  1.0
  Nd  Nd3  1  0.523  0.991  0.103  1.0
  Nd  Nd4  1  0.958  0.250  0.782  1.0
  Nd  Nd5  1  0.977  0.509  0.603  1.0
  Nd  Nd6  1  0.477  0.009  0.897  1.0
  Nd  Nd7  1  0.977  0.991  0.603  1.0
  Nd  Nd8  1  0.981  0.250  0.986  1.0
  Nd  Nd9  1  0.477  0.491  0.897  1.0
  Nd  Nd10  1  0.019  0.750  0.014  1.0
  Nd  Nd11  1  0.542  0.250  0.282  1.0
  Nd  Nd12  1  0.042  0.750  0.218  1.0
  Nd  Nd13  1  0.023  0.009  0.397  1.0
  Nd  Nd14  1  0.523  0.509  0.103  1.0
  Nd  Nd15  1  0.519  0.250  0.486  1.0
  Ge  Ge16  1  0.509  0.750  0.309  1.0
  Ge  Ge17  1  0.491  0.250  0.691  1.0
  Ge  Ge18  1  0.009  0.250  0.191  1.0
  Ge  Ge19  1  0.991  0.750  0.809  1.0
  O  O20  1  0.222  0.250  0.874  1.0
  O  O21  1  0.198  0.250  0.662  1.0
  O  O22  1  0.271  0.750  0.116  1.0
  O  O23  1  0.425  0.939  0.256  1.0
  O  O24  1  0.759  0.981  0.494  1.0
  O  O25  1  0.229  0.750  0.616  1.0
  O  O26  1  0.259  0.019  0.006  1.0
  O  O27  1  0.693  0.250  0.616  1.0
  O  O28  1  0.278  0.250  0.374  1.0
  O  O29  1  0.241  0.019  0.506  1.0
  O  O30  1  0.771  0.250  0.384  1.0
  O  O31  1  0.075  0.561  0.756  1.0
  O  O32  1  0.307  0.750  0.384  1.0
  O  O33  1  0.722  0.750  0.626  1.0
  O  O34  1  0.575  0.439  0.744  1.0
  O  O35  1  0.741  0.981  0.994  1.0
  O  O36  1  0.741  0.519  0.994  1.0
  O  O37  1  0.425  0.561  0.256  1.0
  O  O38  1  0.729  0.250  0.884  1.0
  O  O39  1  0.075  0.939  0.756  1.0
  O  O40  1  0.698  0.750  0.838  1.0
  O  O41  1  0.241  0.481  0.506  1.0
  O  O42  1  0.759  0.519  0.494  1.0
  O  O43  1  0.925  0.061  0.244  1.0
  O  O44  1  0.193  0.750  0.884  1.0
  O  O45  1  0.778  0.750  0.126  1.0
  O  O46  1  0.807  0.250  0.116  1.0
  O  O47  1  0.925  0.439  0.244  1.0
  O  O48  1  0.802  0.750  0.338  1.0
  O  O49  1  0.259  0.481  0.006  1.0
  O  O50  1  0.575  0.061  0.744  1.0
  O  O51  1  0.302  0.250  0.162  1.0
[/CIF]
.