The material structure described by Sm2Fe5Co12C crystallizes in the monoclinic C2/m space group. Sm(1) is bonded in a distorted single-bond geometry to one Fe(1), one Fe(2), two equivalent Fe(3), four equivalent Co(4), six equivalent Co(2), and one C(1) atom. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 14-coordinate geometry to one Sm(1), one Fe(1), one Fe(2), two equivalent Fe(3), one Co(1), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(4) atoms. In the second Fe site, Fe(2) is bonded to two equivalent Sm(1), two equivalent Fe(1), four equivalent Co(2), and four equivalent Co(4) atoms to form distorted FeSm2Fe2Co8 cuboctahedra that share corners with four equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, corners with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra, corners with two equivalent C(1)Sm2Co4 octahedra, edges with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra, faces with four equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, and faces with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra. The corner-sharing octahedral tilt angles are 47°. In the third Fe site, Fe(3) is bonded to two equivalent Sm(1), two equivalent Fe(1), two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), and two equivalent Co(4) atoms to form distorted FeSm2Fe2Co8 cuboctahedra that share corners with two equivalent Fe(2)Sm2Fe2Co8 cuboctahedra, corners with two equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, corners with eight equivalent Co(2)Sm3Fe3Co6 cuboctahedra, edges with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra, faces with two equivalent Fe(2)Sm2Fe2Co8 cuboctahedra, faces with two equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, faces with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra, and faces with two equivalent C(1)Sm2Co4 octahedra. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a single-bond geometry to one Fe(1), two equivalent Fe(3), two equivalent Co(2), two equivalent Co(4), and one C(1) atom. In the second Co site, Co(2) is bonded to three equivalent Sm(1), one Fe(1), one Fe(2), one Fe(3), one Co(1), one Co(2), one Co(3), and three equivalent Co(4) atoms to form distorted CoSm3Fe3Co6 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Fe2Co8 cuboctahedra, corners with four equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, corners with seven equivalent Co(2)Sm3Fe3Co6 cuboctahedra, corners with two equivalent C(1)Sm2Co4 octahedra,  an edgeedge with one Fe(2)Sm2Fe2Co8 cuboctahedra, edges with two equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, edges with three equivalent Co(2)Sm3Fe3Co6 cuboctahedra,  a faceface with one Fe(2)Sm2Fe2Co8 cuboctahedra, faces with two equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, faces with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra, and  a faceface with one C(1)Sm2Co4 octahedra. The corner-sharing octahedral tilt angles range from 65-71°. In the third Co site, Co(3) is bonded in a single-bond geometry to two equivalent Fe(1), two equivalent Fe(3), two equivalent Co(2), two equivalent Co(4), and one C(1) atom. In the fourth Co site, Co(4) is bonded in a 12-coordinate geometry to two equivalent Sm(1), one Fe(2), one Fe(3), two equivalent Fe(1), one Co(1), one Co(3), one Co(4), and three equivalent Co(2) atoms. C(1) is bonded to two equivalent Sm(1), two equivalent Co(1), and two equivalent Co(3) atoms to form CSm2Co4 octahedra that share corners with two equivalent Fe(2)Sm2Fe2Co8 cuboctahedra, corners with eight equivalent Co(2)Sm3Fe3Co6 cuboctahedra, faces with four equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, and faces with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra. is represented by the CIF file [CIF]
data_Sm2Fe5Co12C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.414
_cell_length_b   6.360
_cell_length_c   6.414
_cell_angle_alpha   83.835
_cell_angle_beta   83.644
_cell_angle_gamma   83.835
_symmetry_Int_Tables_number   1
_cell_volume   257.296
_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  0.657  0.642  0.657  1.0
  Sm  Sm1  1  0.343  0.358  0.343  1.0
  Fe  Fe2  1  0.904  0.903  0.904  1.0
  Fe  Fe3  1  0.096  0.097  0.096  1.0
  Fe  Fe4  1  0.000  0.500  0.000  1.0
  Fe  Fe5  1  0.500  0.000  0.000  1.0
  Fe  Fe6  1  0.000  0.000  0.500  1.0
  Co  Co7  1  0.346  0.856  0.346  1.0
  Co  Co8  1  0.854  0.348  0.341  1.0
  Co  Co9  1  0.341  0.348  0.854  1.0
  Co  Co10  1  0.654  0.144  0.654  1.0
  Co  Co11  1  0.146  0.652  0.659  1.0
  Co  Co12  1  0.659  0.652  0.146  1.0
  Co  Co13  1  0.718  0.000  0.282  1.0
  Co  Co14  1  1.000  0.283  0.718  1.0
  Co  Co15  1  0.282  0.717  0.000  1.0
  Co  Co16  1  0.000  0.717  0.282  1.0
  Co  Co17  1  0.718  0.283  1.000  1.0
  Co  Co18  1  0.282  0.000  0.718  1.0
  C  C19  1  0.500  0.000  0.500  1.0
[/CIF]
.
The material structure described by Sm2Fe5Co12C crystallizes in the monoclinic C2/m space group. Sm(1) is bonded in a distorted single-bond geometry to one Fe(1), one Fe(2), two equivalent Fe(3), four equivalent Co(4), six equivalent Co(2), and one C(1) atom. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 14-coordinate geometry to one Sm(1), one Fe(1), one Fe(2), two equivalent Fe(3), one Co(1), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(4) atoms. In the second Fe site, Fe(2) is bonded to two equivalent Sm(1), two equivalent Fe(1), four equivalent Co(2), and four equivalent Co(4) atoms to form distorted FeSm2Fe2Co8 cuboctahedra that share corners with four equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, corners with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra, corners with two equivalent C(1)Sm2Co4 octahedra, edges with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra, faces with four equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, and faces with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra. The corner-sharing octahedral tilt angles are 47°. In the third Fe site, Fe(3) is bonded to two equivalent Sm(1), two equivalent Fe(1), two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), and two equivalent Co(4) atoms to form distorted FeSm2Fe2Co8 cuboctahedra that share corners with two equivalent Fe(2)Sm2Fe2Co8 cuboctahedra, corners with two equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, corners with eight equivalent Co(2)Sm3Fe3Co6 cuboctahedra, edges with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra, faces with two equivalent Fe(2)Sm2Fe2Co8 cuboctahedra, faces with two equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, faces with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra, and faces with two equivalent C(1)Sm2Co4 octahedra. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a single-bond geometry to one Fe(1), two equivalent Fe(3), two equivalent Co(2), two equivalent Co(4), and one C(1) atom. In the second Co site, Co(2) is bonded to three equivalent Sm(1), one Fe(1), one Fe(2), one Fe(3), one Co(1), one Co(2), one Co(3), and three equivalent Co(4) atoms to form distorted CoSm3Fe3Co6 cuboctahedra that share  a cornercorner with one Fe(2)Sm2Fe2Co8 cuboctahedra, corners with four equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, corners with seven equivalent Co(2)Sm3Fe3Co6 cuboctahedra, corners with two equivalent C(1)Sm2Co4 octahedra,  an edgeedge with one Fe(2)Sm2Fe2Co8 cuboctahedra, edges with two equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, edges with three equivalent Co(2)Sm3Fe3Co6 cuboctahedra,  a faceface with one Fe(2)Sm2Fe2Co8 cuboctahedra, faces with two equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, faces with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra, and  a faceface with one C(1)Sm2Co4 octahedra. The corner-sharing octahedral tilt angles range from 65-71°. In the third Co site, Co(3) is bonded in a single-bond geometry to two equivalent Fe(1), two equivalent Fe(3), two equivalent Co(2), two equivalent Co(4), and one C(1) atom. In the fourth Co site, Co(4) is bonded in a 12-coordinate geometry to two equivalent Sm(1), one Fe(2), one Fe(3), two equivalent Fe(1), one Co(1), one Co(3), one Co(4), and three equivalent Co(2) atoms. C(1) is bonded to two equivalent Sm(1), two equivalent Co(1), and two equivalent Co(3) atoms to form CSm2Co4 octahedra that share corners with two equivalent Fe(2)Sm2Fe2Co8 cuboctahedra, corners with eight equivalent Co(2)Sm3Fe3Co6 cuboctahedra, faces with four equivalent Fe(3)Sm2Fe2Co8 cuboctahedra, and faces with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra. is represented by the CIF file [CIF]
data_Sm2Fe5Co12C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.414
_cell_length_b   6.360
_cell_length_c   6.414
_cell_angle_alpha   83.835
_cell_angle_beta   83.644
_cell_angle_gamma   83.835
_symmetry_Int_Tables_number   1
_cell_volume   257.296
_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  0.657  0.642  0.657  1.0
  Sm  Sm1  1  0.343  0.358  0.343  1.0
  Fe  Fe2  1  0.904  0.903  0.904  1.0
  Fe  Fe3  1  0.096  0.097  0.096  1.0
  Fe  Fe4  1  0.000  0.500  0.000  1.0
  Fe  Fe5  1  0.500  0.000  0.000  1.0
  Fe  Fe6  1  0.000  0.000  0.500  1.0
  Co  Co7  1  0.346  0.856  0.346  1.0
  Co  Co8  1  0.854  0.348  0.341  1.0
  Co  Co9  1  0.341  0.348  0.854  1.0
  Co  Co10  1  0.654  0.144  0.654  1.0
  Co  Co11  1  0.146  0.652  0.659  1.0
  Co  Co12  1  0.659  0.652  0.146  1.0
  Co  Co13  1  0.718  0.000  0.282  1.0
  Co  Co14  1  1.000  0.283  0.718  1.0
  Co  Co15  1  0.282  0.717  0.000  1.0
  Co  Co16  1  0.000  0.717  0.282  1.0
  Co  Co17  1  0.718  0.283  1.000  1.0
  Co  Co18  1  0.282  0.000  0.718  1.0
  C  C19  1  0.500  0.000  0.500  1.0
[/CIF]
.