The compound described by Sm2Fe4Co13 is Frank-Kasper $\mu$ Phase-derived structured and crystallizes in the trigonal R3m space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 19-coordinate geometry to three equivalent Fe(1), one Co(4), three equivalent Co(2), six equivalent Co(1), and six equivalent Co(3) atoms. In the second Sm site, Sm(2) is bonded in a 19-coordinate geometry to one Fe(2), three equivalent Fe(1), three equivalent Co(3), six equivalent Co(1), and six equivalent Co(2) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one Sm(1), one Sm(2), one Fe(2), one Co(4), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(1) atoms to form distorted FeSm2FeCo9 cuboctahedra that share corners with four equivalent Fe(1)Sm2FeCo9 cuboctahedra, corners with five equivalent Co(3)Sm3Fe2Co7 cuboctahedra, corners with five equivalent Co(2)Sm3Fe3Co6 cuboctahedra, edges with three equivalent Co(3)Sm3Fe2Co7 cuboctahedra, edges with three equivalent Co(2)Sm3Fe3Co6 cuboctahedra, faces with three equivalent Co(3)Sm3Fe2Co7 cuboctahedra, faces with three equivalent Co(2)Sm3Fe3Co6 cuboctahedra, and faces with four equivalent Fe(1)Sm2FeCo9 cuboctahedra. In the second Fe site, Fe(2) is bonded in a 14-coordinate geometry to one Sm(2), three equivalent Fe(1), one Co(4), three equivalent Co(2), and six equivalent Co(1) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 12-coordinate geometry to one Sm(1), one Sm(2), one Fe(2), two equivalent Fe(1), one Co(4), two equivalent Co(1), two equivalent Co(2), and two equivalent Co(3) atoms. In the second Co site, Co(2) is bonded to one Sm(1), two equivalent Sm(2), one Fe(2), two equivalent Fe(1), two equivalent Co(3), and four equivalent Co(1) atoms to form CoSm3Fe3Co6 cuboctahedra that share corners with two equivalent Co(2)Sm3Fe3Co6 cuboctahedra, corners with five equivalent Fe(1)Sm2FeCo9 cuboctahedra, corners with eight equivalent Co(3)Sm3Fe2Co7 cuboctahedra,  an edgeedge with one Co(3)Sm3Fe2Co7 cuboctahedra, edges with three equivalent Fe(1)Sm2FeCo9 cuboctahedra, edges with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra, faces with three equivalent Fe(1)Sm2FeCo9 cuboctahedra, faces with three equivalent Co(3)Sm3Fe2Co7 cuboctahedra, and faces with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra. In the third Co site, Co(3) is bonded to one Sm(2), two equivalent Sm(1), two equivalent Fe(1), one Co(4), two equivalent Co(2), and four equivalent Co(1) atoms to form CoSm3Fe2Co7 cuboctahedra that share corners with two equivalent Co(3)Sm3Fe2Co7 cuboctahedra, corners with five equivalent Fe(1)Sm2FeCo9 cuboctahedra, corners with eight equivalent Co(2)Sm3Fe3Co6 cuboctahedra,  an edgeedge with one Co(2)Sm3Fe3Co6 cuboctahedra, edges with three equivalent Fe(1)Sm2FeCo9 cuboctahedra, edges with four equivalent Co(3)Sm3Fe2Co7 cuboctahedra, faces with three equivalent Fe(1)Sm2FeCo9 cuboctahedra, faces with three equivalent Co(2)Sm3Fe3Co6 cuboctahedra, and faces with four equivalent Co(3)Sm3Fe2Co7 cuboctahedra. In the fourth Co site, Co(4) is bonded in a 14-coordinate geometry to one Sm(1), one Fe(2), three equivalent Fe(1), three equivalent Co(3), and six equivalent Co(1) atoms. is represented by the CIF file [CIF]
data_Sm2Fe4Co13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.346
_cell_length_b   6.346
_cell_length_c   6.346
_cell_angle_alpha   82.630
_cell_angle_beta   82.630
_cell_angle_gamma   82.630
_symmetry_Int_Tables_number   1
_cell_volume   249.730
_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  0.657  0.657  1.0
  Sm  Sm1  1  0.343  0.343  0.343  1.0
  Fe  Fe2  1  0.997  0.997  0.504  1.0
  Fe  Fe3  1  0.504  0.997  0.997  1.0
  Fe  Fe4  1  0.997  0.504  0.997  1.0
  Fe  Fe5  1  0.094  0.094  0.094  1.0
  Co  Co6  1  0.713  0.287  0.000  1.0
  Co  Co7  1  0.000  0.713  0.287  1.0
  Co  Co8  1  0.287  0.000  0.713  1.0
  Co  Co9  1  0.000  0.287  0.713  1.0
  Co  Co10  1  0.713  0.000  0.287  1.0
  Co  Co11  1  0.287  0.713  0.000  1.0
  Co  Co12  1  0.343  0.343  0.847  1.0
  Co  Co13  1  0.847  0.343  0.343  1.0
  Co  Co14  1  0.343  0.847  0.343  1.0
  Co  Co15  1  0.656  0.656  0.158  1.0
  Co  Co16  1  0.158  0.656  0.656  1.0
  Co  Co17  1  0.656  0.158  0.656  1.0
  Co  Co18  1  0.903  0.903  0.903  1.0
[/CIF]
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The compound described by Sm2Fe4Co13 is Frank-Kasper $\mu$ Phase-derived structured and crystallizes in the trigonal R3m space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 19-coordinate geometry to three equivalent Fe(1), one Co(4), three equivalent Co(2), six equivalent Co(1), and six equivalent Co(3) atoms. In the second Sm site, Sm(2) is bonded in a 19-coordinate geometry to one Fe(2), three equivalent Fe(1), three equivalent Co(3), six equivalent Co(1), and six equivalent Co(2) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one Sm(1), one Sm(2), one Fe(2), one Co(4), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(1) atoms to form distorted FeSm2FeCo9 cuboctahedra that share corners with four equivalent Fe(1)Sm2FeCo9 cuboctahedra, corners with five equivalent Co(3)Sm3Fe2Co7 cuboctahedra, corners with five equivalent Co(2)Sm3Fe3Co6 cuboctahedra, edges with three equivalent Co(3)Sm3Fe2Co7 cuboctahedra, edges with three equivalent Co(2)Sm3Fe3Co6 cuboctahedra, faces with three equivalent Co(3)Sm3Fe2Co7 cuboctahedra, faces with three equivalent Co(2)Sm3Fe3Co6 cuboctahedra, and faces with four equivalent Fe(1)Sm2FeCo9 cuboctahedra. In the second Fe site, Fe(2) is bonded in a 14-coordinate geometry to one Sm(2), three equivalent Fe(1), one Co(4), three equivalent Co(2), and six equivalent Co(1) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 12-coordinate geometry to one Sm(1), one Sm(2), one Fe(2), two equivalent Fe(1), one Co(4), two equivalent Co(1), two equivalent Co(2), and two equivalent Co(3) atoms. In the second Co site, Co(2) is bonded to one Sm(1), two equivalent Sm(2), one Fe(2), two equivalent Fe(1), two equivalent Co(3), and four equivalent Co(1) atoms to form CoSm3Fe3Co6 cuboctahedra that share corners with two equivalent Co(2)Sm3Fe3Co6 cuboctahedra, corners with five equivalent Fe(1)Sm2FeCo9 cuboctahedra, corners with eight equivalent Co(3)Sm3Fe2Co7 cuboctahedra,  an edgeedge with one Co(3)Sm3Fe2Co7 cuboctahedra, edges with three equivalent Fe(1)Sm2FeCo9 cuboctahedra, edges with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra, faces with three equivalent Fe(1)Sm2FeCo9 cuboctahedra, faces with three equivalent Co(3)Sm3Fe2Co7 cuboctahedra, and faces with four equivalent Co(2)Sm3Fe3Co6 cuboctahedra. In the third Co site, Co(3) is bonded to one Sm(2), two equivalent Sm(1), two equivalent Fe(1), one Co(4), two equivalent Co(2), and four equivalent Co(1) atoms to form CoSm3Fe2Co7 cuboctahedra that share corners with two equivalent Co(3)Sm3Fe2Co7 cuboctahedra, corners with five equivalent Fe(1)Sm2FeCo9 cuboctahedra, corners with eight equivalent Co(2)Sm3Fe3Co6 cuboctahedra,  an edgeedge with one Co(2)Sm3Fe3Co6 cuboctahedra, edges with three equivalent Fe(1)Sm2FeCo9 cuboctahedra, edges with four equivalent Co(3)Sm3Fe2Co7 cuboctahedra, faces with three equivalent Fe(1)Sm2FeCo9 cuboctahedra, faces with three equivalent Co(2)Sm3Fe3Co6 cuboctahedra, and faces with four equivalent Co(3)Sm3Fe2Co7 cuboctahedra. In the fourth Co site, Co(4) is bonded in a 14-coordinate geometry to one Sm(1), one Fe(2), three equivalent Fe(1), three equivalent Co(3), and six equivalent Co(1) atoms. is represented by the CIF file [CIF]
data_Sm2Fe4Co13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.346
_cell_length_b   6.346
_cell_length_c   6.346
_cell_angle_alpha   82.630
_cell_angle_beta   82.630
_cell_angle_gamma   82.630
_symmetry_Int_Tables_number   1
_cell_volume   249.730
_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  0.657  0.657  1.0
  Sm  Sm1  1  0.343  0.343  0.343  1.0
  Fe  Fe2  1  0.997  0.997  0.504  1.0
  Fe  Fe3  1  0.504  0.997  0.997  1.0
  Fe  Fe4  1  0.997  0.504  0.997  1.0
  Fe  Fe5  1  0.094  0.094  0.094  1.0
  Co  Co6  1  0.713  0.287  0.000  1.0
  Co  Co7  1  0.000  0.713  0.287  1.0
  Co  Co8  1  0.287  0.000  0.713  1.0
  Co  Co9  1  0.000  0.287  0.713  1.0
  Co  Co10  1  0.713  0.000  0.287  1.0
  Co  Co11  1  0.287  0.713  0.000  1.0
  Co  Co12  1  0.343  0.343  0.847  1.0
  Co  Co13  1  0.847  0.343  0.343  1.0
  Co  Co14  1  0.343  0.847  0.343  1.0
  Co  Co15  1  0.656  0.656  0.158  1.0
  Co  Co16  1  0.158  0.656  0.656  1.0
  Co  Co17  1  0.656  0.158  0.656  1.0
  Co  Co18  1  0.903  0.903  0.903  1.0
[/CIF]
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