The crystal structure described by Nd4Ge7 crystallizes in the orthorhombic C222_1 space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 10-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), two equivalent Ge(3), and four equivalent Ge(4) atoms. In the second Nd site, Nd(2) is bonded in a 10-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), two equivalent Ge(3), and four equivalent Ge(4) atoms. In the third Nd site, Nd(3) is bonded in a 9-coordinate geometry to one Ge(1), two equivalent Ge(4), four equivalent Ge(2), and four equivalent Ge(3) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Nd(1), two equivalent Nd(2), two equivalent Nd(3), and two equivalent Ge(3) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Nd(1), one Nd(2), four equivalent Nd(3), one Ge(2), one Ge(3), and one Ge(4) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to one Nd(1), one Nd(2), four equivalent Nd(3), one Ge(1), one Ge(2), and one Ge(4) atom. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Nd(1), two equivalent Nd(2), two equivalent Nd(3), one Ge(2), one Ge(3), and one Ge(4) atom. is represented by the CIF file [CIF]
data_Nd4Ge7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.031
_cell_length_b   7.603
_cell_length_c   12.064
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   113.368
_symmetry_Int_Tables_number   1
_cell_volume   507.841
_cell_formula_units_Z   2
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  0.513  0.000  0.500  1.0
  Nd  Nd1  1  0.487  0.000  0.000  1.0
  Nd  Nd2  1  0.997  0.994  0.250  1.0
  Nd  Nd3  1  0.003  0.006  0.750  1.0
  Nd  Nd4  1  0.510  0.490  0.619  1.0
  Nd  Nd5  1  0.020  0.510  0.381  1.0
  Nd  Nd6  1  0.490  0.510  0.119  1.0
  Nd  Nd7  1  0.980  0.490  0.881  1.0
  Ge  Ge8  1  0.435  0.870  0.250  1.0
  Ge  Ge9  1  0.565  0.130  0.750  1.0
  Ge  Ge10  1  0.523  0.700  0.837  1.0
  Ge  Ge11  1  0.823  0.300  0.163  1.0
  Ge  Ge12  1  0.477  0.300  0.337  1.0
  Ge  Ge13  1  0.177  0.700  0.663  1.0
  Ge  Ge14  1  0.423  0.343  0.872  1.0
  Ge  Ge15  1  0.080  0.657  0.128  1.0
  Ge  Ge16  1  0.106  0.176  0.490  1.0
  Ge  Ge17  1  0.930  0.824  0.510  1.0
  Ge  Ge18  1  0.894  0.824  0.990  1.0
  Ge  Ge19  1  0.070  0.176  0.010  1.0
  Ge  Ge20  1  0.920  0.343  0.628  1.0
  Ge  Ge21  1  0.577  0.657  0.372  1.0
[/CIF]
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The crystal structure described by Nd4Ge7 crystallizes in the orthorhombic C222_1 space group. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 10-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), two equivalent Ge(3), and four equivalent Ge(4) atoms. In the second Nd site, Nd(2) is bonded in a 10-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), two equivalent Ge(3), and four equivalent Ge(4) atoms. In the third Nd site, Nd(3) is bonded in a 9-coordinate geometry to one Ge(1), two equivalent Ge(4), four equivalent Ge(2), and four equivalent Ge(3) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Nd(1), two equivalent Nd(2), two equivalent Nd(3), and two equivalent Ge(3) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Nd(1), one Nd(2), four equivalent Nd(3), one Ge(2), one Ge(3), and one Ge(4) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to one Nd(1), one Nd(2), four equivalent Nd(3), one Ge(1), one Ge(2), and one Ge(4) atom. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Nd(1), two equivalent Nd(2), two equivalent Nd(3), one Ge(2), one Ge(3), and one Ge(4) atom. is represented by the CIF file [CIF]
data_Nd4Ge7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.031
_cell_length_b   7.603
_cell_length_c   12.064
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   113.368
_symmetry_Int_Tables_number   1
_cell_volume   507.841
_cell_formula_units_Z   2
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  0.513  0.000  0.500  1.0
  Nd  Nd1  1  0.487  0.000  0.000  1.0
  Nd  Nd2  1  0.997  0.994  0.250  1.0
  Nd  Nd3  1  0.003  0.006  0.750  1.0
  Nd  Nd4  1  0.510  0.490  0.619  1.0
  Nd  Nd5  1  0.020  0.510  0.381  1.0
  Nd  Nd6  1  0.490  0.510  0.119  1.0
  Nd  Nd7  1  0.980  0.490  0.881  1.0
  Ge  Ge8  1  0.435  0.870  0.250  1.0
  Ge  Ge9  1  0.565  0.130  0.750  1.0
  Ge  Ge10  1  0.523  0.700  0.837  1.0
  Ge  Ge11  1  0.823  0.300  0.163  1.0
  Ge  Ge12  1  0.477  0.300  0.337  1.0
  Ge  Ge13  1  0.177  0.700  0.663  1.0
  Ge  Ge14  1  0.423  0.343  0.872  1.0
  Ge  Ge15  1  0.080  0.657  0.128  1.0
  Ge  Ge16  1  0.106  0.176  0.490  1.0
  Ge  Ge17  1  0.930  0.824  0.510  1.0
  Ge  Ge18  1  0.894  0.824  0.990  1.0
  Ge  Ge19  1  0.070  0.176  0.010  1.0
  Ge  Ge20  1  0.920  0.343  0.628  1.0
  Ge  Ge21  1  0.577  0.657  0.372  1.0
[/CIF]
.