The material structure described by Nd15Ge9C crystallizes in the hexagonal P6_3mc space group. There are four inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 6-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. In the second Nd site, Nd(2) is bonded in a 1-coordinate geometry to two equivalent Ge(2), two equivalent Ge(3), and one C(1) atom. In the third Nd site, Nd(3) is bonded in a 5-coordinate geometry to one Ge(1), one Ge(3), two equivalent Ge(2), and one C(1) atom. In the fourth Nd site, Nd(4) is bonded in a 4-coordinate geometry to one Ge(3) and three equivalent Ge(1) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a 8-coordinate geometry to two equivalent Nd(2), two equivalent Nd(3), and four equivalent Nd(1) atoms. In the second Ge site, Ge(3) is bonded in a 8-coordinate geometry to one Nd(3), one Nd(4), two equivalent Nd(2), and four equivalent Nd(1) atoms. In the third Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Nd(3), three equivalent Nd(4), and four equivalent Nd(1) atoms. C(1) is bonded in an octahedral geometry to three equivalent Nd(2) and three equivalent Nd(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nd15Ge9C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.784
_cell_length_b   15.347
_cell_length_c   15.347
_cell_angle_alpha   120.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1383.840
_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  0.500  0.017  0.342  1.0
  Nd  Nd1  1  0.500  0.325  0.983  1.0
  Nd  Nd2  1  0.500  0.658  0.675  1.0
  Nd  Nd3  1  0.500  0.325  0.342  1.0
  Nd  Nd4  1  0.500  0.658  0.983  1.0
  Nd  Nd5  1  0.500  0.017  0.675  1.0
  Nd  Nd6  1  1.000  0.983  0.658  1.0
  Nd  Nd7  1  1.000  0.675  0.017  1.0
  Nd  Nd8  1  1.000  0.342  0.325  1.0
  Nd  Nd9  1  1.000  0.675  0.658  1.0
  Nd  Nd10  1  1.000  0.342  0.017  1.0
  Nd  Nd11  1  1.000  0.983  0.325  1.0
  Nd  Nd12  1  0.771  0.413  0.825  1.0
  Nd  Nd13  1  0.771  0.413  0.587  1.0
  Nd  Nd14  1  0.771  0.175  0.587  1.0
  Nd  Nd15  1  0.271  0.587  0.175  1.0
  Nd  Nd16  1  0.271  0.587  0.413  1.0
  Nd  Nd17  1  0.271  0.825  0.413  1.0
  Nd  Nd18  1  0.211  0.255  0.509  1.0
  Nd  Nd19  1  0.211  0.255  0.745  1.0
  Nd  Nd20  1  0.211  0.491  0.745  1.0
  Nd  Nd21  1  0.711  0.745  0.491  1.0
  Nd  Nd22  1  0.711  0.745  0.255  1.0
  Nd  Nd23  1  0.711  0.509  0.255  1.0
  Nd  Nd24  1  0.767  0.081  0.162  1.0
  Nd  Nd25  1  0.767  0.081  0.919  1.0
  Nd  Nd26  1  0.767  0.838  0.919  1.0
  Nd  Nd27  1  0.267  0.919  0.838  1.0
  Nd  Nd28  1  0.267  0.919  0.081  1.0
  Nd  Nd29  1  0.267  0.162  0.081  1.0
  Ge  Ge30  1  0.223  0.133  0.265  1.0
  Ge  Ge31  1  0.223  0.133  0.867  1.0
  Ge  Ge32  1  0.223  0.735  0.867  1.0
  Ge  Ge33  1  0.723  0.867  0.735  1.0
  Ge  Ge34  1  0.723  0.867  0.133  1.0
  Ge  Ge35  1  0.723  0.265  0.133  1.0
  Ge  Ge36  1  0.235  0.467  0.934  1.0
  Ge  Ge37  1  0.235  0.467  0.533  1.0
  Ge  Ge38  1  0.235  0.066  0.533  1.0
  Ge  Ge39  1  0.735  0.533  0.066  1.0
  Ge  Ge40  1  0.735  0.533  0.467  1.0
  Ge  Ge41  1  0.735  0.934  0.467  1.0
  Ge  Ge42  1  0.786  0.198  0.396  1.0
  Ge  Ge43  1  0.786  0.198  0.802  1.0
  Ge  Ge44  1  0.786  0.604  0.802  1.0
  Ge  Ge45  1  0.286  0.802  0.604  1.0
  Ge  Ge46  1  0.286  0.802  0.198  1.0
  Ge  Ge47  1  0.286  0.396  0.198  1.0
  C  C48  1  0.990  0.333  0.667  1.0
  C  C49  1  0.490  0.667  0.333  1.0
[/CIF]
.
The material structure described by Nd15Ge9C crystallizes in the hexagonal P6_3mc space group. There are four inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 6-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. In the second Nd site, Nd(2) is bonded in a 1-coordinate geometry to two equivalent Ge(2), two equivalent Ge(3), and one C(1) atom. In the third Nd site, Nd(3) is bonded in a 5-coordinate geometry to one Ge(1), one Ge(3), two equivalent Ge(2), and one C(1) atom. In the fourth Nd site, Nd(4) is bonded in a 4-coordinate geometry to one Ge(3) and three equivalent Ge(1) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a 8-coordinate geometry to two equivalent Nd(2), two equivalent Nd(3), and four equivalent Nd(1) atoms. In the second Ge site, Ge(3) is bonded in a 8-coordinate geometry to one Nd(3), one Nd(4), two equivalent Nd(2), and four equivalent Nd(1) atoms. In the third Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Nd(3), three equivalent Nd(4), and four equivalent Nd(1) atoms. C(1) is bonded in an octahedral geometry to three equivalent Nd(2) and three equivalent Nd(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nd15Ge9C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.784
_cell_length_b   15.347
_cell_length_c   15.347
_cell_angle_alpha   120.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1383.840
_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  0.500  0.017  0.342  1.0
  Nd  Nd1  1  0.500  0.325  0.983  1.0
  Nd  Nd2  1  0.500  0.658  0.675  1.0
  Nd  Nd3  1  0.500  0.325  0.342  1.0
  Nd  Nd4  1  0.500  0.658  0.983  1.0
  Nd  Nd5  1  0.500  0.017  0.675  1.0
  Nd  Nd6  1  1.000  0.983  0.658  1.0
  Nd  Nd7  1  1.000  0.675  0.017  1.0
  Nd  Nd8  1  1.000  0.342  0.325  1.0
  Nd  Nd9  1  1.000  0.675  0.658  1.0
  Nd  Nd10  1  1.000  0.342  0.017  1.0
  Nd  Nd11  1  1.000  0.983  0.325  1.0
  Nd  Nd12  1  0.771  0.413  0.825  1.0
  Nd  Nd13  1  0.771  0.413  0.587  1.0
  Nd  Nd14  1  0.771  0.175  0.587  1.0
  Nd  Nd15  1  0.271  0.587  0.175  1.0
  Nd  Nd16  1  0.271  0.587  0.413  1.0
  Nd  Nd17  1  0.271  0.825  0.413  1.0
  Nd  Nd18  1  0.211  0.255  0.509  1.0
  Nd  Nd19  1  0.211  0.255  0.745  1.0
  Nd  Nd20  1  0.211  0.491  0.745  1.0
  Nd  Nd21  1  0.711  0.745  0.491  1.0
  Nd  Nd22  1  0.711  0.745  0.255  1.0
  Nd  Nd23  1  0.711  0.509  0.255  1.0
  Nd  Nd24  1  0.767  0.081  0.162  1.0
  Nd  Nd25  1  0.767  0.081  0.919  1.0
  Nd  Nd26  1  0.767  0.838  0.919  1.0
  Nd  Nd27  1  0.267  0.919  0.838  1.0
  Nd  Nd28  1  0.267  0.919  0.081  1.0
  Nd  Nd29  1  0.267  0.162  0.081  1.0
  Ge  Ge30  1  0.223  0.133  0.265  1.0
  Ge  Ge31  1  0.223  0.133  0.867  1.0
  Ge  Ge32  1  0.223  0.735  0.867  1.0
  Ge  Ge33  1  0.723  0.867  0.735  1.0
  Ge  Ge34  1  0.723  0.867  0.133  1.0
  Ge  Ge35  1  0.723  0.265  0.133  1.0
  Ge  Ge36  1  0.235  0.467  0.934  1.0
  Ge  Ge37  1  0.235  0.467  0.533  1.0
  Ge  Ge38  1  0.235  0.066  0.533  1.0
  Ge  Ge39  1  0.735  0.533  0.066  1.0
  Ge  Ge40  1  0.735  0.533  0.467  1.0
  Ge  Ge41  1  0.735  0.934  0.467  1.0
  Ge  Ge42  1  0.786  0.198  0.396  1.0
  Ge  Ge43  1  0.786  0.198  0.802  1.0
  Ge  Ge44  1  0.786  0.604  0.802  1.0
  Ge  Ge45  1  0.286  0.802  0.604  1.0
  Ge  Ge46  1  0.286  0.802  0.198  1.0
  Ge  Ge47  1  0.286  0.396  0.198  1.0
  C  C48  1  0.990  0.333  0.667  1.0
  C  C49  1  0.490  0.667  0.333  1.0
[/CIF]
.