The crystal structure described by Nd2Mn17C2 crystallizes in the monoclinic C2/m space group. Nd(1) is bonded in a distorted bent 120 degrees geometry to one Mn(1), one Mn(4), two equivalent Mn(2), two equivalent Mn(5), three equivalent Mn(7), and two equivalent C(1) atoms. There are seven inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 14-coordinate geometry to one Nd(1), one Mn(1), one Mn(4), one Mn(7), two equivalent Mn(2), two equivalent Mn(5), two equivalent Mn(6), and four equivalent Mn(3) atoms. In the second Mn site, Mn(2) is bonded to two equivalent Nd(1), two equivalent Mn(1), two equivalent Mn(3), two equivalent Mn(5), two equivalent Mn(6), and two equivalent Mn(7) atoms to form distorted MnNd2Mn10 cuboctahedra that share corners with two equivalent Mn(2)Nd2Mn10 cuboctahedra, corners with two equivalent Mn(5)Nd2Mn10 cuboctahedra, corners with two equivalent Mn(7)Nd3Mn9 cuboctahedra, corners with four equivalent C(1)Nd2Mn4 octahedra,  an edgeedge with one Mn(2)Nd2Mn10 cuboctahedra, edges with two equivalent Mn(5)Nd2Mn10 cuboctahedra, edges with two equivalent C(1)Nd2Mn4 octahedra,  a faceface with one Mn(2)Nd2Mn10 cuboctahedra, faces with two equivalent Mn(5)Nd2Mn10 cuboctahedra, and faces with four equivalent Mn(7)Nd3Mn9 cuboctahedra. The corner-sharing octahedral tilt angles range from 20-28°. In the third Mn site, Mn(3) is bonded in a single-bond geometry to one Mn(2), one Mn(4), one Mn(5), one Mn(7), two equivalent Mn(1), and one C(1) atom. In the fourth Mn site, Mn(4) is bonded in a 12-coordinate geometry to two equivalent Nd(1), two equivalent Mn(1), four equivalent Mn(3), and four equivalent Mn(6) atoms. In the fifth Mn site, Mn(5) is bonded to two equivalent Nd(1), two equivalent Mn(1), two equivalent Mn(2), two equivalent Mn(3), two equivalent Mn(6), and two equivalent Mn(7) atoms to form distorted MnNd2Mn10 cuboctahedra that share corners with two equivalent Mn(2)Nd2Mn10 cuboctahedra, corners with two equivalent Mn(5)Nd2Mn10 cuboctahedra, corners with two equivalent Mn(7)Nd3Mn9 cuboctahedra, corners with two equivalent C(1)Nd2Mn4 octahedra, edges with two equivalent Mn(2)Nd2Mn10 cuboctahedra, edges with two equivalent Mn(7)Nd3Mn9 cuboctahedra, faces with two equivalent Mn(2)Nd2Mn10 cuboctahedra, faces with two equivalent Mn(5)Nd2Mn10 cuboctahedra, faces with two equivalent Mn(7)Nd3Mn9 cuboctahedra, and faces with two equivalent C(1)Nd2Mn4 octahedra. The corner-sharing octahedral tilt angles are 47°. In the sixth Mn site, Mn(6) is bonded in a single-bond geometry to one Mn(1), one Mn(2), one Mn(4), one Mn(5), one Mn(7), and one C(1) atom. In the seventh Mn site, Mn(7) is bonded to three equivalent Nd(1), one Mn(1), two equivalent Mn(2), two equivalent Mn(3), two equivalent Mn(5), and two equivalent Mn(6) atoms to form distorted MnNd3Mn9 cuboctahedra that share corners with two equivalent Mn(2)Nd2Mn10 cuboctahedra, corners with two equivalent Mn(5)Nd2Mn10 cuboctahedra, corners with four equivalent Mn(7)Nd3Mn9 cuboctahedra, corners with four equivalent C(1)Nd2Mn4 octahedra,  an edgeedge with one Mn(7)Nd3Mn9 cuboctahedra, edges with two equivalent Mn(5)Nd2Mn10 cuboctahedra,  a faceface with one Mn(7)Nd3Mn9 cuboctahedra, faces with two equivalent Mn(5)Nd2Mn10 cuboctahedra, faces with four equivalent Mn(2)Nd2Mn10 cuboctahedra, and faces with two equivalent C(1)Nd2Mn4 octahedra. The corner-sharing octahedral tilt angles range from 61-70°. C(1) is bonded to two equivalent Nd(1), two equivalent Mn(3), and two equivalent Mn(6) atoms to form CNd2Mn4 octahedra that share corners with two equivalent Mn(5)Nd2Mn10 cuboctahedra, corners with four equivalent Mn(2)Nd2Mn10 cuboctahedra, corners with four equivalent Mn(7)Nd3Mn9 cuboctahedra, corners with two equivalent C(1)Nd2Mn4 octahedra, edges with two equivalent Mn(2)Nd2Mn10 cuboctahedra, faces with two equivalent Mn(5)Nd2Mn10 cuboctahedra, and faces with two equivalent Mn(7)Nd3Mn9 cuboctahedra. The corner-sharing octahedral tilt angles are 63°. is represented by the CIF file [CIF]
data_Nd2Mn17C2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.468
_cell_length_b   6.468
_cell_length_c   6.459
_cell_angle_alpha   83.607
_cell_angle_beta   83.607
_cell_angle_gamma   83.874
_symmetry_Int_Tables_number   1
_cell_volume   265.611
_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  0.645  0.645  0.662  1.0
  Nd  Nd1  1  0.355  0.355  0.338  1.0
  Mn  Mn2  1  0.908  0.908  0.907  1.0
  Mn  Mn3  1  0.092  0.092  0.093  1.0
  Mn  Mn4  1  0.268  0.732  0.000  1.0
  Mn  Mn5  1  0.720  0.997  0.282  1.0
  Mn  Mn6  1  0.003  0.280  0.718  1.0
  Mn  Mn7  1  0.280  0.003  0.718  1.0
  Mn  Mn8  1  0.997  0.720  0.282  1.0
  Mn  Mn9  1  0.732  0.268  0.000  1.0
  Mn  Mn10  1  0.000  0.000  0.500  1.0
  Mn  Mn11  1  0.000  0.500  0.000  1.0
  Mn  Mn12  1  0.500  0.000  0.000  1.0
  Mn  Mn13  1  0.869  0.334  0.336  1.0
  Mn  Mn14  1  0.344  0.344  0.865  1.0
  Mn  Mn15  1  0.334  0.869  0.336  1.0
  Mn  Mn16  1  0.131  0.666  0.664  1.0
  Mn  Mn17  1  0.656  0.656  0.135  1.0
  Mn  Mn18  1  0.666  0.131  0.664  1.0
  C  C19  1  0.500  0.000  0.500  1.0
  C  C20  1  0.000  0.500  0.500  1.0
[/CIF]
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The crystal structure described by Nd2Mn17C2 crystallizes in the monoclinic C2/m space group. Nd(1) is bonded in a distorted bent 120 degrees geometry to one Mn(1), one Mn(4), two equivalent Mn(2), two equivalent Mn(5), three equivalent Mn(7), and two equivalent C(1) atoms. There are seven inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 14-coordinate geometry to one Nd(1), one Mn(1), one Mn(4), one Mn(7), two equivalent Mn(2), two equivalent Mn(5), two equivalent Mn(6), and four equivalent Mn(3) atoms. In the second Mn site, Mn(2) is bonded to two equivalent Nd(1), two equivalent Mn(1), two equivalent Mn(3), two equivalent Mn(5), two equivalent Mn(6), and two equivalent Mn(7) atoms to form distorted MnNd2Mn10 cuboctahedra that share corners with two equivalent Mn(2)Nd2Mn10 cuboctahedra, corners with two equivalent Mn(5)Nd2Mn10 cuboctahedra, corners with two equivalent Mn(7)Nd3Mn9 cuboctahedra, corners with four equivalent C(1)Nd2Mn4 octahedra,  an edgeedge with one Mn(2)Nd2Mn10 cuboctahedra, edges with two equivalent Mn(5)Nd2Mn10 cuboctahedra, edges with two equivalent C(1)Nd2Mn4 octahedra,  a faceface with one Mn(2)Nd2Mn10 cuboctahedra, faces with two equivalent Mn(5)Nd2Mn10 cuboctahedra, and faces with four equivalent Mn(7)Nd3Mn9 cuboctahedra. The corner-sharing octahedral tilt angles range from 20-28°. In the third Mn site, Mn(3) is bonded in a single-bond geometry to one Mn(2), one Mn(4), one Mn(5), one Mn(7), two equivalent Mn(1), and one C(1) atom. In the fourth Mn site, Mn(4) is bonded in a 12-coordinate geometry to two equivalent Nd(1), two equivalent Mn(1), four equivalent Mn(3), and four equivalent Mn(6) atoms. In the fifth Mn site, Mn(5) is bonded to two equivalent Nd(1), two equivalent Mn(1), two equivalent Mn(2), two equivalent Mn(3), two equivalent Mn(6), and two equivalent Mn(7) atoms to form distorted MnNd2Mn10 cuboctahedra that share corners with two equivalent Mn(2)Nd2Mn10 cuboctahedra, corners with two equivalent Mn(5)Nd2Mn10 cuboctahedra, corners with two equivalent Mn(7)Nd3Mn9 cuboctahedra, corners with two equivalent C(1)Nd2Mn4 octahedra, edges with two equivalent Mn(2)Nd2Mn10 cuboctahedra, edges with two equivalent Mn(7)Nd3Mn9 cuboctahedra, faces with two equivalent Mn(2)Nd2Mn10 cuboctahedra, faces with two equivalent Mn(5)Nd2Mn10 cuboctahedra, faces with two equivalent Mn(7)Nd3Mn9 cuboctahedra, and faces with two equivalent C(1)Nd2Mn4 octahedra. The corner-sharing octahedral tilt angles are 47°. In the sixth Mn site, Mn(6) is bonded in a single-bond geometry to one Mn(1), one Mn(2), one Mn(4), one Mn(5), one Mn(7), and one C(1) atom. In the seventh Mn site, Mn(7) is bonded to three equivalent Nd(1), one Mn(1), two equivalent Mn(2), two equivalent Mn(3), two equivalent Mn(5), and two equivalent Mn(6) atoms to form distorted MnNd3Mn9 cuboctahedra that share corners with two equivalent Mn(2)Nd2Mn10 cuboctahedra, corners with two equivalent Mn(5)Nd2Mn10 cuboctahedra, corners with four equivalent Mn(7)Nd3Mn9 cuboctahedra, corners with four equivalent C(1)Nd2Mn4 octahedra,  an edgeedge with one Mn(7)Nd3Mn9 cuboctahedra, edges with two equivalent Mn(5)Nd2Mn10 cuboctahedra,  a faceface with one Mn(7)Nd3Mn9 cuboctahedra, faces with two equivalent Mn(5)Nd2Mn10 cuboctahedra, faces with four equivalent Mn(2)Nd2Mn10 cuboctahedra, and faces with two equivalent C(1)Nd2Mn4 octahedra. The corner-sharing octahedral tilt angles range from 61-70°. C(1) is bonded to two equivalent Nd(1), two equivalent Mn(3), and two equivalent Mn(6) atoms to form CNd2Mn4 octahedra that share corners with two equivalent Mn(5)Nd2Mn10 cuboctahedra, corners with four equivalent Mn(2)Nd2Mn10 cuboctahedra, corners with four equivalent Mn(7)Nd3Mn9 cuboctahedra, corners with two equivalent C(1)Nd2Mn4 octahedra, edges with two equivalent Mn(2)Nd2Mn10 cuboctahedra, faces with two equivalent Mn(5)Nd2Mn10 cuboctahedra, and faces with two equivalent Mn(7)Nd3Mn9 cuboctahedra. The corner-sharing octahedral tilt angles are 63°. is represented by the CIF file [CIF]
data_Nd2Mn17C2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.468
_cell_length_b   6.468
_cell_length_c   6.459
_cell_angle_alpha   83.607
_cell_angle_beta   83.607
_cell_angle_gamma   83.874
_symmetry_Int_Tables_number   1
_cell_volume   265.611
_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  0.645  0.645  0.662  1.0
  Nd  Nd1  1  0.355  0.355  0.338  1.0
  Mn  Mn2  1  0.908  0.908  0.907  1.0
  Mn  Mn3  1  0.092  0.092  0.093  1.0
  Mn  Mn4  1  0.268  0.732  0.000  1.0
  Mn  Mn5  1  0.720  0.997  0.282  1.0
  Mn  Mn6  1  0.003  0.280  0.718  1.0
  Mn  Mn7  1  0.280  0.003  0.718  1.0
  Mn  Mn8  1  0.997  0.720  0.282  1.0
  Mn  Mn9  1  0.732  0.268  0.000  1.0
  Mn  Mn10  1  0.000  0.000  0.500  1.0
  Mn  Mn11  1  0.000  0.500  0.000  1.0
  Mn  Mn12  1  0.500  0.000  0.000  1.0
  Mn  Mn13  1  0.869  0.334  0.336  1.0
  Mn  Mn14  1  0.344  0.344  0.865  1.0
  Mn  Mn15  1  0.334  0.869  0.336  1.0
  Mn  Mn16  1  0.131  0.666  0.664  1.0
  Mn  Mn17  1  0.656  0.656  0.135  1.0
  Mn  Mn18  1  0.666  0.131  0.664  1.0
  C  C19  1  0.500  0.000  0.500  1.0
  C  C20  1  0.000  0.500  0.500  1.0
[/CIF]
.