The compound described by Y2Mn17C3 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a distorted trigonal planar geometry to two equivalent Mn(2), six equivalent Mn(4), and three equivalent C(1) atoms. In the second Y site, Y(2) is bonded in a trigonal planar geometry to three equivalent C(1) atoms. There are four inequivalent Mn sites. In the first Mn site, Mn(4) is bonded to two equivalent Y(1), two equivalent Mn(2), four equivalent Mn(1), and four equivalent Mn(3) atoms to form MnY2Mn10 cuboctahedra that share corners with four equivalent Mn(4)Y2Mn10 cuboctahedra, corners with two equivalent C(1)Y2Mn4 octahedra, faces with six equivalent Mn(4)Y2Mn10 cuboctahedra, and faces with four equivalent C(1)Y2Mn4 octahedra. The corner-sharing octahedral tilt angles are 40°. In the second Mn site, Mn(1) is bonded in a single-bond geometry to two equivalent Mn(2), two equivalent Mn(4), and one C(1) atom. In the third Mn site, Mn(2) is bonded in a 14-coordinate geometry to one Y(1), one Mn(2), three equivalent Mn(3), three equivalent Mn(4), and six equivalent Mn(1) atoms. In the fourth Mn site, Mn(3) is bonded in a single-bond geometry to one Mn(2), two equivalent Mn(4), and one C(1) atom. C(1) is bonded to one Y(1), one Y(2), two equivalent Mn(1), and two equivalent Mn(3) atoms to form CY2Mn4 octahedra that share corners with two equivalent Mn(4)Y2Mn10 cuboctahedra, corners with four equivalent C(1)Y2Mn4 octahedra, and faces with four equivalent Mn(4)Y2Mn10 cuboctahedra. The corner-sharing octahedral tilt angles are 60°. is represented by the CIF file [CIF]
data_Y2Mn17C3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.273
_cell_length_b   8.537
_cell_length_c   8.537
_cell_angle_alpha   120.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   522.166
_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
  Y  Y0  1  0.750  0.667  0.333  1.0
  Y  Y1  1  0.250  0.333  0.667  1.0
  Y  Y2  1  0.750  0.000  0.000  1.0
  Y  Y3  1  0.250  0.000  0.000  1.0
  Mn  Mn4  1  0.750  0.613  0.672  1.0
  Mn  Mn5  1  0.250  0.387  0.328  1.0
  Mn  Mn6  1  0.750  0.059  0.387  1.0
  Mn  Mn7  1  0.250  0.941  0.328  1.0
  Mn  Mn8  1  0.250  0.941  0.613  1.0
  Mn  Mn9  1  0.750  0.059  0.672  1.0
  Mn  Mn10  1  0.750  0.328  0.941  1.0
  Mn  Mn11  1  0.250  0.672  0.613  1.0
  Mn  Mn12  1  0.250  0.672  0.059  1.0
  Mn  Mn13  1  0.750  0.328  0.387  1.0
  Mn  Mn14  1  0.250  0.387  0.059  1.0
  Mn  Mn15  1  0.750  0.613  0.941  1.0
  Mn  Mn16  1  0.390  0.667  0.333  1.0
  Mn  Mn17  1  0.610  0.333  0.667  1.0
  Mn  Mn18  1  0.890  0.333  0.667  1.0
  Mn  Mn19  1  0.110  0.667  0.333  1.0
  Mn  Mn20  1  0.977  0.829  0.171  1.0
  Mn  Mn21  1  0.023  0.171  0.829  1.0
  Mn  Mn22  1  0.977  0.343  0.171  1.0
  Mn  Mn23  1  0.477  0.171  0.829  1.0
  Mn  Mn24  1  0.023  0.657  0.829  1.0
  Mn  Mn25  1  0.523  0.829  0.171  1.0
  Mn  Mn26  1  0.977  0.829  0.657  1.0
  Mn  Mn27  1  0.477  0.657  0.829  1.0
  Mn  Mn28  1  0.023  0.171  0.343  1.0
  Mn  Mn29  1  0.523  0.343  0.171  1.0
  Mn  Mn30  1  0.477  0.171  0.343  1.0
  Mn  Mn31  1  0.523  0.829  0.657  1.0
  Mn  Mn32  1  0.000  0.500  0.500  1.0
  Mn  Mn33  1  0.000  0.000  0.500  1.0
  Mn  Mn34  1  0.500  0.500  0.500  1.0
  Mn  Mn35  1  0.000  0.500  0.000  1.0
  Mn  Mn36  1  0.500  0.000  0.500  1.0
  Mn  Mn37  1  0.500  0.500  0.000  1.0
  C  C38  1  0.750  0.836  0.164  1.0
  C  C39  1  0.250  0.164  0.836  1.0
  C  C40  1  0.750  0.329  0.164  1.0
  C  C41  1  0.250  0.671  0.836  1.0
  C  C42  1  0.750  0.836  0.671  1.0
  C  C43  1  0.250  0.164  0.329  1.0
[/CIF]
.
The compound described by Y2Mn17C3 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a distorted trigonal planar geometry to two equivalent Mn(2), six equivalent Mn(4), and three equivalent C(1) atoms. In the second Y site, Y(2) is bonded in a trigonal planar geometry to three equivalent C(1) atoms. There are four inequivalent Mn sites. In the first Mn site, Mn(4) is bonded to two equivalent Y(1), two equivalent Mn(2), four equivalent Mn(1), and four equivalent Mn(3) atoms to form MnY2Mn10 cuboctahedra that share corners with four equivalent Mn(4)Y2Mn10 cuboctahedra, corners with two equivalent C(1)Y2Mn4 octahedra, faces with six equivalent Mn(4)Y2Mn10 cuboctahedra, and faces with four equivalent C(1)Y2Mn4 octahedra. The corner-sharing octahedral tilt angles are 40°. In the second Mn site, Mn(1) is bonded in a single-bond geometry to two equivalent Mn(2), two equivalent Mn(4), and one C(1) atom. In the third Mn site, Mn(2) is bonded in a 14-coordinate geometry to one Y(1), one Mn(2), three equivalent Mn(3), three equivalent Mn(4), and six equivalent Mn(1) atoms. In the fourth Mn site, Mn(3) is bonded in a single-bond geometry to one Mn(2), two equivalent Mn(4), and one C(1) atom. C(1) is bonded to one Y(1), one Y(2), two equivalent Mn(1), and two equivalent Mn(3) atoms to form CY2Mn4 octahedra that share corners with two equivalent Mn(4)Y2Mn10 cuboctahedra, corners with four equivalent C(1)Y2Mn4 octahedra, and faces with four equivalent Mn(4)Y2Mn10 cuboctahedra. The corner-sharing octahedral tilt angles are 60°. is represented by the CIF file [CIF]
data_Y2Mn17C3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.273
_cell_length_b   8.537
_cell_length_c   8.537
_cell_angle_alpha   120.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   522.166
_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
  Y  Y0  1  0.750  0.667  0.333  1.0
  Y  Y1  1  0.250  0.333  0.667  1.0
  Y  Y2  1  0.750  0.000  0.000  1.0
  Y  Y3  1  0.250  0.000  0.000  1.0
  Mn  Mn4  1  0.750  0.613  0.672  1.0
  Mn  Mn5  1  0.250  0.387  0.328  1.0
  Mn  Mn6  1  0.750  0.059  0.387  1.0
  Mn  Mn7  1  0.250  0.941  0.328  1.0
  Mn  Mn8  1  0.250  0.941  0.613  1.0
  Mn  Mn9  1  0.750  0.059  0.672  1.0
  Mn  Mn10  1  0.750  0.328  0.941  1.0
  Mn  Mn11  1  0.250  0.672  0.613  1.0
  Mn  Mn12  1  0.250  0.672  0.059  1.0
  Mn  Mn13  1  0.750  0.328  0.387  1.0
  Mn  Mn14  1  0.250  0.387  0.059  1.0
  Mn  Mn15  1  0.750  0.613  0.941  1.0
  Mn  Mn16  1  0.390  0.667  0.333  1.0
  Mn  Mn17  1  0.610  0.333  0.667  1.0
  Mn  Mn18  1  0.890  0.333  0.667  1.0
  Mn  Mn19  1  0.110  0.667  0.333  1.0
  Mn  Mn20  1  0.977  0.829  0.171  1.0
  Mn  Mn21  1  0.023  0.171  0.829  1.0
  Mn  Mn22  1  0.977  0.343  0.171  1.0
  Mn  Mn23  1  0.477  0.171  0.829  1.0
  Mn  Mn24  1  0.023  0.657  0.829  1.0
  Mn  Mn25  1  0.523  0.829  0.171  1.0
  Mn  Mn26  1  0.977  0.829  0.657  1.0
  Mn  Mn27  1  0.477  0.657  0.829  1.0
  Mn  Mn28  1  0.023  0.171  0.343  1.0
  Mn  Mn29  1  0.523  0.343  0.171  1.0
  Mn  Mn30  1  0.477  0.171  0.343  1.0
  Mn  Mn31  1  0.523  0.829  0.657  1.0
  Mn  Mn32  1  0.000  0.500  0.500  1.0
  Mn  Mn33  1  0.000  0.000  0.500  1.0
  Mn  Mn34  1  0.500  0.500  0.500  1.0
  Mn  Mn35  1  0.000  0.500  0.000  1.0
  Mn  Mn36  1  0.500  0.000  0.500  1.0
  Mn  Mn37  1  0.500  0.500  0.000  1.0
  C  C38  1  0.750  0.836  0.164  1.0
  C  C39  1  0.250  0.164  0.836  1.0
  C  C40  1  0.750  0.329  0.164  1.0
  C  C41  1  0.250  0.671  0.836  1.0
  C  C42  1  0.750  0.836  0.671  1.0
  C  C43  1  0.250  0.164  0.329  1.0
[/CIF]
.