The material described by Sm2Co7 crystallizes in the trigonal R-3m space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 18-coordinate geometry to three equivalent Co(2), three equivalent Co(3), six equivalent Co(4), and six equivalent Co(5) atoms. In the second Sm site, Sm(2) is bonded in a 12-coordinate geometry to three equivalent Co(1) and nine equivalent Co(5) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded to six equivalent Sm(2) and six equivalent Co(5) atoms to form CoSm6Co6 cuboctahedra that share corners with twelve equivalent Co(5)Sm5Co7 cuboctahedra, edges with six equivalent Co(1)Sm6Co6 cuboctahedra, and faces with eighteen equivalent Co(5)Sm5Co7 cuboctahedra. In the second Co site, Co(2) is bonded in a 9-coordinate geometry to three equivalent Sm(1), three equivalent Co(4), and three equivalent Co(5) atoms. In the third Co site, Co(3) is bonded in a 9-coordinate geometry to three equivalent Sm(1), three equivalent Co(4), and three equivalent Co(5) atoms. In the fourth Co site, Co(4) is bonded to four equivalent Sm(1), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(4) atoms to form CoSm4Co8 cuboctahedra that share corners with four equivalent Co(4)Sm4Co8 cuboctahedra, corners with twelve equivalent Co(5)Sm5Co7 cuboctahedra, edges with two equivalent Co(4)Sm4Co8 cuboctahedra, edges with eight equivalent Co(5)Sm5Co7 cuboctahedra, faces with two equivalent Co(5)Sm5Co7 cuboctahedra, and faces with eight equivalent Co(4)Sm4Co8 cuboctahedra. In the fifth Co site, Co(5) is bonded to two equivalent Sm(1), three equivalent Sm(2), one Co(1), one Co(2), one Co(3), and four equivalent Co(5) atoms to form distorted CoSm5Co7 cuboctahedra that share corners with two equivalent Co(1)Sm6Co6 cuboctahedra, corners with six equivalent Co(4)Sm4Co8 cuboctahedra, corners with nine equivalent Co(5)Sm5Co7 cuboctahedra, edges with four equivalent Co(4)Sm4Co8 cuboctahedra, edges with four equivalent Co(5)Sm5Co7 cuboctahedra,  a faceface with one Co(4)Sm4Co8 cuboctahedra, faces with three equivalent Co(1)Sm6Co6 cuboctahedra, and faces with ten equivalent Co(5)Sm5Co7 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sm2Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.989
_cell_length_b   4.989
_cell_length_c   12.424
_cell_angle_alpha   78.416
_cell_angle_beta   78.416
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   260.540
_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
  Sm  Sm0  1  0.949  0.949  0.154  1.0
  Sm  Sm1  1  0.051  0.051  0.846  1.0
  Sm  Sm2  1  0.852  0.852  0.444  1.0
  Sm  Sm3  1  0.148  0.148  0.556  1.0
  Co  Co4  1  0.500  0.500  0.500  1.0
  Co  Co5  1  0.721  0.721  0.836  1.0
  Co  Co6  1  0.279  0.279  0.164  1.0
  Co  Co7  1  0.612  0.612  0.164  1.0
  Co  Co8  1  0.388  0.388  0.836  1.0
  Co  Co9  1  0.000  0.500  0.000  1.0
  Co  Co10  1  0.500  0.000  0.000  1.0
  Co  Co11  1  0.500  0.500  0.000  1.0
  Co  Co12  1  0.392  0.392  0.325  1.0
  Co  Co13  1  0.890  0.392  0.325  1.0
  Co  Co14  1  0.392  0.890  0.325  1.0
  Co  Co15  1  0.608  0.608  0.675  1.0
  Co  Co16  1  0.110  0.608  0.675  1.0
  Co  Co17  1  0.608  0.110  0.675  1.0
[/CIF]
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The material described by Sm2Co7 crystallizes in the trigonal R-3m space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 18-coordinate geometry to three equivalent Co(2), three equivalent Co(3), six equivalent Co(4), and six equivalent Co(5) atoms. In the second Sm site, Sm(2) is bonded in a 12-coordinate geometry to three equivalent Co(1) and nine equivalent Co(5) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded to six equivalent Sm(2) and six equivalent Co(5) atoms to form CoSm6Co6 cuboctahedra that share corners with twelve equivalent Co(5)Sm5Co7 cuboctahedra, edges with six equivalent Co(1)Sm6Co6 cuboctahedra, and faces with eighteen equivalent Co(5)Sm5Co7 cuboctahedra. In the second Co site, Co(2) is bonded in a 9-coordinate geometry to three equivalent Sm(1), three equivalent Co(4), and three equivalent Co(5) atoms. In the third Co site, Co(3) is bonded in a 9-coordinate geometry to three equivalent Sm(1), three equivalent Co(4), and three equivalent Co(5) atoms. In the fourth Co site, Co(4) is bonded to four equivalent Sm(1), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(4) atoms to form CoSm4Co8 cuboctahedra that share corners with four equivalent Co(4)Sm4Co8 cuboctahedra, corners with twelve equivalent Co(5)Sm5Co7 cuboctahedra, edges with two equivalent Co(4)Sm4Co8 cuboctahedra, edges with eight equivalent Co(5)Sm5Co7 cuboctahedra, faces with two equivalent Co(5)Sm5Co7 cuboctahedra, and faces with eight equivalent Co(4)Sm4Co8 cuboctahedra. In the fifth Co site, Co(5) is bonded to two equivalent Sm(1), three equivalent Sm(2), one Co(1), one Co(2), one Co(3), and four equivalent Co(5) atoms to form distorted CoSm5Co7 cuboctahedra that share corners with two equivalent Co(1)Sm6Co6 cuboctahedra, corners with six equivalent Co(4)Sm4Co8 cuboctahedra, corners with nine equivalent Co(5)Sm5Co7 cuboctahedra, edges with four equivalent Co(4)Sm4Co8 cuboctahedra, edges with four equivalent Co(5)Sm5Co7 cuboctahedra,  a faceface with one Co(4)Sm4Co8 cuboctahedra, faces with three equivalent Co(1)Sm6Co6 cuboctahedra, and faces with ten equivalent Co(5)Sm5Co7 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sm2Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.989
_cell_length_b   4.989
_cell_length_c   12.424
_cell_angle_alpha   78.416
_cell_angle_beta   78.416
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   260.540
_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
  Sm  Sm0  1  0.949  0.949  0.154  1.0
  Sm  Sm1  1  0.051  0.051  0.846  1.0
  Sm  Sm2  1  0.852  0.852  0.444  1.0
  Sm  Sm3  1  0.148  0.148  0.556  1.0
  Co  Co4  1  0.500  0.500  0.500  1.0
  Co  Co5  1  0.721  0.721  0.836  1.0
  Co  Co6  1  0.279  0.279  0.164  1.0
  Co  Co7  1  0.612  0.612  0.164  1.0
  Co  Co8  1  0.388  0.388  0.836  1.0
  Co  Co9  1  0.000  0.500  0.000  1.0
  Co  Co10  1  0.500  0.000  0.000  1.0
  Co  Co11  1  0.500  0.500  0.000  1.0
  Co  Co12  1  0.392  0.392  0.325  1.0
  Co  Co13  1  0.890  0.392  0.325  1.0
  Co  Co14  1  0.392  0.890  0.325  1.0
  Co  Co15  1  0.608  0.608  0.675  1.0
  Co  Co16  1  0.110  0.608  0.675  1.0
  Co  Co17  1  0.608  0.110  0.675  1.0
[/CIF]
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