The crystal structure described by SmNdFe4Co13 is Frank-Kasper $\mu$ Phase-derived structured and crystallizes in the trigonal R3m space group. Sm(1) 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. Nd(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. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one Sm(1), one Nd(1), one Fe(2), one Co(4), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(1) atoms to form distorted FeNdSmFeCo9 cuboctahedra that share corners with four equivalent Fe(1)NdSmFeCo9 cuboctahedra, corners with five equivalent Co(3)Nd2SmFe2Co7 cuboctahedra, corners with five equivalent Co(2)NdSm2Fe3Co6 cuboctahedra, edges with three equivalent Co(3)Nd2SmFe2Co7 cuboctahedra, edges with three equivalent Co(2)NdSm2Fe3Co6 cuboctahedra, faces with three equivalent Co(3)Nd2SmFe2Co7 cuboctahedra, faces with three equivalent Co(2)NdSm2Fe3Co6 cuboctahedra, and faces with four equivalent Fe(1)NdSmFeCo9 cuboctahedra. In the second Fe site, Fe(2) is bonded in a 14-coordinate geometry to one Sm(1), 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 Nd(1), 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 two equivalent Sm(1), one Nd(1), one Fe(2), two equivalent Fe(1), two equivalent Co(3), and four equivalent Co(1) atoms to form CoNdSm2Fe3Co6 cuboctahedra that share corners with two equivalent Co(2)NdSm2Fe3Co6 cuboctahedra, corners with five equivalent Fe(1)NdSmFeCo9 cuboctahedra, corners with eight equivalent Co(3)Nd2SmFe2Co7 cuboctahedra,  an edgeedge with one Co(3)Nd2SmFe2Co7 cuboctahedra, edges with three equivalent Fe(1)NdSmFeCo9 cuboctahedra, edges with four equivalent Co(2)NdSm2Fe3Co6 cuboctahedra, faces with three equivalent Fe(1)NdSmFeCo9 cuboctahedra, faces with three equivalent Co(3)Nd2SmFe2Co7 cuboctahedra, and faces with four equivalent Co(2)NdSm2Fe3Co6 cuboctahedra. In the third Co site, Co(3) is bonded to one Sm(1), two equivalent Nd(1), two equivalent Fe(1), one Co(4), two equivalent Co(2), and four equivalent Co(1) atoms to form CoNd2SmFe2Co7 cuboctahedra that share corners with two equivalent Co(3)Nd2SmFe2Co7 cuboctahedra, corners with five equivalent Fe(1)NdSmFeCo9 cuboctahedra, corners with eight equivalent Co(2)NdSm2Fe3Co6 cuboctahedra,  an edgeedge with one Co(2)NdSm2Fe3Co6 cuboctahedra, edges with three equivalent Fe(1)NdSmFeCo9 cuboctahedra, edges with four equivalent Co(3)Nd2SmFe2Co7 cuboctahedra, faces with three equivalent Fe(1)NdSmFeCo9 cuboctahedra, faces with three equivalent Co(2)NdSm2Fe3Co6 cuboctahedra, and faces with four equivalent Co(3)Nd2SmFe2Co7 cuboctahedra. In the fourth Co site, Co(4) is bonded in a 14-coordinate geometry to one Nd(1), one Fe(2), three equivalent Fe(1), three equivalent Co(3), and six equivalent Co(1) atoms. is represented by the CIF card [CIF]
data_NdSmFe4Co13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.354
_cell_length_b   6.354
_cell_length_c   6.354
_cell_angle_alpha   82.881
_cell_angle_beta   82.881
_cell_angle_gamma   82.881
_symmetry_Int_Tables_number   1
_cell_volume   251.051
_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  0.344  0.344  0.344  1.0
  Sm  Sm1  1  0.657  0.657  0.657  1.0
  Fe  Fe2  1  0.002  0.002  0.495  1.0
  Fe  Fe3  1  0.002  0.495  0.002  1.0
  Fe  Fe4  1  0.495  0.002  0.002  1.0
  Fe  Fe5  1  0.907  0.907  0.907  1.0
  Co  Co6  1  0.714  0.286  1.000  1.0
  Co  Co7  1  0.286  1.000  0.714  1.0
  Co  Co8  1  1.000  0.714  0.286  1.0
  Co  Co9  1  0.714  1.000  0.286  1.0
  Co  Co10  1  1.000  0.286  0.714  1.0
  Co  Co11  1  0.286  0.714  1.000  1.0
  Co  Co12  1  0.657  0.657  0.153  1.0
  Co  Co13  1  0.657  0.153  0.657  1.0
  Co  Co14  1  0.153  0.657  0.657  1.0
  Co  Co15  1  0.344  0.344  0.843  1.0
  Co  Co16  1  0.344  0.843  0.344  1.0
  Co  Co17  1  0.843  0.344  0.344  1.0
  Co  Co18  1  0.095  0.095  0.095  1.0
[/CIF]
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The crystal structure described by SmNdFe4Co13 is Frank-Kasper $\mu$ Phase-derived structured and crystallizes in the trigonal R3m space group. Sm(1) 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. Nd(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. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one Sm(1), one Nd(1), one Fe(2), one Co(4), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(1) atoms to form distorted FeNdSmFeCo9 cuboctahedra that share corners with four equivalent Fe(1)NdSmFeCo9 cuboctahedra, corners with five equivalent Co(3)Nd2SmFe2Co7 cuboctahedra, corners with five equivalent Co(2)NdSm2Fe3Co6 cuboctahedra, edges with three equivalent Co(3)Nd2SmFe2Co7 cuboctahedra, edges with three equivalent Co(2)NdSm2Fe3Co6 cuboctahedra, faces with three equivalent Co(3)Nd2SmFe2Co7 cuboctahedra, faces with three equivalent Co(2)NdSm2Fe3Co6 cuboctahedra, and faces with four equivalent Fe(1)NdSmFeCo9 cuboctahedra. In the second Fe site, Fe(2) is bonded in a 14-coordinate geometry to one Sm(1), 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 Nd(1), 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 two equivalent Sm(1), one Nd(1), one Fe(2), two equivalent Fe(1), two equivalent Co(3), and four equivalent Co(1) atoms to form CoNdSm2Fe3Co6 cuboctahedra that share corners with two equivalent Co(2)NdSm2Fe3Co6 cuboctahedra, corners with five equivalent Fe(1)NdSmFeCo9 cuboctahedra, corners with eight equivalent Co(3)Nd2SmFe2Co7 cuboctahedra,  an edgeedge with one Co(3)Nd2SmFe2Co7 cuboctahedra, edges with three equivalent Fe(1)NdSmFeCo9 cuboctahedra, edges with four equivalent Co(2)NdSm2Fe3Co6 cuboctahedra, faces with three equivalent Fe(1)NdSmFeCo9 cuboctahedra, faces with three equivalent Co(3)Nd2SmFe2Co7 cuboctahedra, and faces with four equivalent Co(2)NdSm2Fe3Co6 cuboctahedra. In the third Co site, Co(3) is bonded to one Sm(1), two equivalent Nd(1), two equivalent Fe(1), one Co(4), two equivalent Co(2), and four equivalent Co(1) atoms to form CoNd2SmFe2Co7 cuboctahedra that share corners with two equivalent Co(3)Nd2SmFe2Co7 cuboctahedra, corners with five equivalent Fe(1)NdSmFeCo9 cuboctahedra, corners with eight equivalent Co(2)NdSm2Fe3Co6 cuboctahedra,  an edgeedge with one Co(2)NdSm2Fe3Co6 cuboctahedra, edges with three equivalent Fe(1)NdSmFeCo9 cuboctahedra, edges with four equivalent Co(3)Nd2SmFe2Co7 cuboctahedra, faces with three equivalent Fe(1)NdSmFeCo9 cuboctahedra, faces with three equivalent Co(2)NdSm2Fe3Co6 cuboctahedra, and faces with four equivalent Co(3)Nd2SmFe2Co7 cuboctahedra. In the fourth Co site, Co(4) is bonded in a 14-coordinate geometry to one Nd(1), one Fe(2), three equivalent Fe(1), three equivalent Co(3), and six equivalent Co(1) atoms. is represented by the CIF card [CIF]
data_NdSmFe4Co13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.354
_cell_length_b   6.354
_cell_length_c   6.354
_cell_angle_alpha   82.881
_cell_angle_beta   82.881
_cell_angle_gamma   82.881
_symmetry_Int_Tables_number   1
_cell_volume   251.051
_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  0.344  0.344  0.344  1.0
  Sm  Sm1  1  0.657  0.657  0.657  1.0
  Fe  Fe2  1  0.002  0.002  0.495  1.0
  Fe  Fe3  1  0.002  0.495  0.002  1.0
  Fe  Fe4  1  0.495  0.002  0.002  1.0
  Fe  Fe5  1  0.907  0.907  0.907  1.0
  Co  Co6  1  0.714  0.286  1.000  1.0
  Co  Co7  1  0.286  1.000  0.714  1.0
  Co  Co8  1  1.000  0.714  0.286  1.0
  Co  Co9  1  0.714  1.000  0.286  1.0
  Co  Co10  1  1.000  0.286  0.714  1.0
  Co  Co11  1  0.286  0.714  1.000  1.0
  Co  Co12  1  0.657  0.657  0.153  1.0
  Co  Co13  1  0.657  0.153  0.657  1.0
  Co  Co14  1  0.153  0.657  0.657  1.0
  Co  Co15  1  0.344  0.344  0.843  1.0
  Co  Co16  1  0.344  0.843  0.344  1.0
  Co  Co17  1  0.843  0.344  0.344  1.0
  Co  Co18  1  0.095  0.095  0.095  1.0
[/CIF]
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