The structure described by Sm11(Fe2C3)6 crystallizes in the cubic I-43m space group. There are three inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to four equivalent C(1) and four equivalent C(2) atoms. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to six equivalent C(2) atoms. In the third Sm site, Sm(3) is bonded in a 12-coordinate geometry to twelve equivalent Fe(1) atoms. Fe(1) is bonded in a distorted trigonal non-coplanar geometry to one Sm(3), one C(1), and two equivalent C(2) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 7-coordinate geometry to four equivalent Sm(1), two equivalent Fe(1), and one C(1) atom. In the second C site, C(2) is bonded to two equivalent Sm(1), two equivalent Sm(2), and two equivalent Fe(1) atoms to form a mixture of distorted corner and edge-sharing CSm4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-72°. is represented by the CIF card [CIF]
data_Sm11(Fe2C3)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.913
_cell_length_b   8.913
_cell_length_c   8.913
_cell_angle_alpha   109.469
_cell_angle_beta   109.471
_cell_angle_gamma   109.473
_symmetry_Int_Tables_number   1
_cell_volume   545.017
_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
  Sm  Sm0  1  0.250  0.750  0.500  1.0
  Sm  Sm1  1  0.750  0.250  0.500  1.0
  Sm  Sm2  1  0.750  0.500  0.250  1.0
  Sm  Sm3  1  0.250  0.500  0.750  1.0
  Sm  Sm4  1  0.500  0.250  0.750  1.0
  Sm  Sm5  1  0.500  0.750  0.250  1.0
  Sm  Sm6  1  0.408  0.408  0.408  1.0
  Sm  Sm7  1  0.592  0.000  0.000  1.0
  Sm  Sm8  1  1.000  0.592  0.000  1.0
  Sm  Sm9  1  1.000  0.000  0.592  1.0
  Sm  Sm10  1  1.000  0.000  0.000  1.0
  Fe  Fe11  1  0.843  0.646  0.646  1.0
  Fe  Fe12  1  0.157  0.803  0.803  1.0
  Fe  Fe13  1  0.000  0.354  0.197  1.0
  Fe  Fe14  1  0.646  0.646  0.843  1.0
  Fe  Fe15  1  0.000  0.197  0.354  1.0
  Fe  Fe16  1  0.803  0.803  0.157  1.0
  Fe  Fe17  1  0.354  0.197  1.000  1.0
  Fe  Fe18  1  0.197  0.354  1.000  1.0
  Fe  Fe19  1  0.646  0.843  0.646  1.0
  Fe  Fe20  1  0.197  0.000  0.354  1.0
  Fe  Fe21  1  0.354  1.000  0.197  1.0
  Fe  Fe22  1  0.803  0.157  0.803  1.0
  C  C23  1  0.568  0.568  0.000  1.0
  C  C24  1  0.432  0.432  0.000  1.0
  C  C25  1  0.568  0.000  0.568  1.0
  C  C26  1  0.432  0.000  0.432  1.0
  C  C27  1  1.000  0.568  0.568  1.0
  C  C28  1  1.000  0.432  0.432  1.0
  C  C29  1  0.502  0.709  0.709  1.0
  C  C30  1  0.498  0.207  0.207  1.0
  C  C31  1  1.000  0.291  0.793  1.0
  C  C32  1  0.709  0.709  0.502  1.0
  C  C33  1  0.000  0.793  0.291  1.0
  C  C34  1  0.207  0.207  0.498  1.0
  C  C35  1  0.291  0.793  1.000  1.0
  C  C36  1  0.793  0.291  1.000  1.0
  C  C37  1  0.709  0.502  0.709  1.0
  C  C38  1  0.793  0.000  0.291  1.0
  C  C39  1  0.291  1.000  0.793  1.0
  C  C40  1  0.207  0.498  0.207  1.0
[/CIF]
.
The structure described by Sm11(Fe2C3)6 crystallizes in the cubic I-43m space group. There are three inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to four equivalent C(1) and four equivalent C(2) atoms. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to six equivalent C(2) atoms. In the third Sm site, Sm(3) is bonded in a 12-coordinate geometry to twelve equivalent Fe(1) atoms. Fe(1) is bonded in a distorted trigonal non-coplanar geometry to one Sm(3), one C(1), and two equivalent C(2) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 7-coordinate geometry to four equivalent Sm(1), two equivalent Fe(1), and one C(1) atom. In the second C site, C(2) is bonded to two equivalent Sm(1), two equivalent Sm(2), and two equivalent Fe(1) atoms to form a mixture of distorted corner and edge-sharing CSm4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-72°. is represented by the CIF card [CIF]
data_Sm11(Fe2C3)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.913
_cell_length_b   8.913
_cell_length_c   8.913
_cell_angle_alpha   109.469
_cell_angle_beta   109.471
_cell_angle_gamma   109.473
_symmetry_Int_Tables_number   1
_cell_volume   545.017
_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
  Sm  Sm0  1  0.250  0.750  0.500  1.0
  Sm  Sm1  1  0.750  0.250  0.500  1.0
  Sm  Sm2  1  0.750  0.500  0.250  1.0
  Sm  Sm3  1  0.250  0.500  0.750  1.0
  Sm  Sm4  1  0.500  0.250  0.750  1.0
  Sm  Sm5  1  0.500  0.750  0.250  1.0
  Sm  Sm6  1  0.408  0.408  0.408  1.0
  Sm  Sm7  1  0.592  0.000  0.000  1.0
  Sm  Sm8  1  1.000  0.592  0.000  1.0
  Sm  Sm9  1  1.000  0.000  0.592  1.0
  Sm  Sm10  1  1.000  0.000  0.000  1.0
  Fe  Fe11  1  0.843  0.646  0.646  1.0
  Fe  Fe12  1  0.157  0.803  0.803  1.0
  Fe  Fe13  1  0.000  0.354  0.197  1.0
  Fe  Fe14  1  0.646  0.646  0.843  1.0
  Fe  Fe15  1  0.000  0.197  0.354  1.0
  Fe  Fe16  1  0.803  0.803  0.157  1.0
  Fe  Fe17  1  0.354  0.197  1.000  1.0
  Fe  Fe18  1  0.197  0.354  1.000  1.0
  Fe  Fe19  1  0.646  0.843  0.646  1.0
  Fe  Fe20  1  0.197  0.000  0.354  1.0
  Fe  Fe21  1  0.354  1.000  0.197  1.0
  Fe  Fe22  1  0.803  0.157  0.803  1.0
  C  C23  1  0.568  0.568  0.000  1.0
  C  C24  1  0.432  0.432  0.000  1.0
  C  C25  1  0.568  0.000  0.568  1.0
  C  C26  1  0.432  0.000  0.432  1.0
  C  C27  1  1.000  0.568  0.568  1.0
  C  C28  1  1.000  0.432  0.432  1.0
  C  C29  1  0.502  0.709  0.709  1.0
  C  C30  1  0.498  0.207  0.207  1.0
  C  C31  1  1.000  0.291  0.793  1.0
  C  C32  1  0.709  0.709  0.502  1.0
  C  C33  1  0.000  0.793  0.291  1.0
  C  C34  1  0.207  0.207  0.498  1.0
  C  C35  1  0.291  0.793  1.000  1.0
  C  C36  1  0.793  0.291  1.000  1.0
  C  C37  1  0.709  0.502  0.709  1.0
  C  C38  1  0.793  0.000  0.291  1.0
  C  C39  1  0.291  1.000  0.793  1.0
  C  C40  1  0.207  0.498  0.207  1.0
[/CIF]
.