The crystal structure described by Sm6Ni20P13 crystallizes in the hexagonal P-6 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 16-coordinate geometry to one Ni(1), one Ni(8), two equivalent Ni(2), two equivalent Ni(5), two equivalent Ni(6), two equivalent Ni(7), two equivalent P(2), and four equivalent P(1) atoms. In the second Sm site, Sm(2) is bonded in a 15-coordinate geometry to one Ni(6), two equivalent Ni(4), two equivalent Ni(5), two equivalent Ni(7), two equivalent Ni(8), two equivalent P(4), and four equivalent P(3) atoms. There are eight inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 4-coordinate geometry to one Sm(1), one P(4), one P(5), and two equivalent P(2) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to six equivalent Sm(1) and three equivalent P(1) atoms. In the third Ni site, Ni(3) is bonded in a 5-coordinate geometry to one P(2), two equivalent P(4), and two equivalent P(5) atoms. In the fourth Ni site, Ni(4) is bonded in a distorted trigonal planar geometry to six equivalent Sm(2) and three equivalent P(3) atoms. In the fifth Ni site, Ni(5) is bonded to two equivalent Sm(1), two equivalent Sm(2), one P(3), one P(4), and two equivalent P(1) atoms to form distorted NiSm4P4 tetrahedra that share corners with two equivalent Ni(6)Sm3P4 tetrahedra, corners with two equivalent Ni(5)Sm4P4 tetrahedra, corners with four equivalent Ni(7)Sm4P4 tetrahedra, edges with two equivalent Ni(5)Sm4P4 tetrahedra, faces with two equivalent Ni(6)Sm3P4 tetrahedra, and faces with two equivalent Ni(7)Sm4P4 tetrahedra. In the sixth Ni site, Ni(6) is bonded to one Sm(2), two equivalent Sm(1), one P(1), one P(2), and two equivalent P(4) atoms to form distorted NiSm3P4 tetrahedra that share corners with two equivalent Ni(5)Sm4P4 tetrahedra, corners with three equivalent Ni(7)Sm4P4 tetrahedra,  an edgeedge with one Ni(7)Sm4P4 tetrahedra, edges with two equivalent Ni(6)Sm3P4 tetrahedra,  a faceface with one Ni(7)Sm4P4 tetrahedra, and faces with two equivalent Ni(5)Sm4P4 tetrahedra. In the seventh Ni site, Ni(7) is bonded to two equivalent Sm(1), two equivalent Sm(2), one P(1), one P(2), and two equivalent P(3) atoms to form distorted NiSm4P4 tetrahedra that share corners with two equivalent Ni(7)Sm4P4 tetrahedra, corners with three equivalent Ni(6)Sm3P4 tetrahedra, corners with four equivalent Ni(5)Sm4P4 tetrahedra,  an edgeedge with one Ni(6)Sm3P4 tetrahedra, edges with two equivalent Ni(7)Sm4P4 tetrahedra,  a faceface with one Ni(6)Sm3P4 tetrahedra, and faces with two equivalent Ni(5)Sm4P4 tetrahedra. In the eighth Ni site, Ni(8) is bonded in a 4-coordinate geometry to one Sm(1), two equivalent Sm(2), one P(3), one P(4), and two equivalent P(2) atoms. There are five inequivalent P sites. In the first P site, P(3) is bonded in a 9-coordinate geometry to four equivalent Sm(2), one Ni(4), one Ni(5), one Ni(8), and two equivalent Ni(7) atoms. In the second P site, P(4) is bonded in a 9-coordinate geometry to two equivalent Sm(2), one Ni(1), one Ni(5), one Ni(8), two equivalent Ni(3), and two equivalent Ni(6) atoms. In the third P site, P(5) is bonded in a 9-coordinate geometry to three equivalent Ni(1) and six equivalent Ni(3) atoms. In the fourth P site, P(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Ni(2), one Ni(6), one Ni(7), and two equivalent Ni(5) atoms. In the fifth P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Sm(1), one Ni(3), one Ni(6), one Ni(7), two equivalent Ni(1), and two equivalent Ni(8) atoms. is represented by the CIF file [CIF]
data_Sm6Ni20P13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.781
_cell_length_b   12.781
_cell_length_c   3.816
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   539.757
_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  0.718  0.531  0.000  1.0
  Sm  Sm1  1  0.813  0.282  0.000  1.0
  Sm  Sm2  1  0.469  0.187  0.000  1.0
  Sm  Sm3  1  0.532  0.813  0.500  1.0
  Sm  Sm4  1  0.281  0.468  0.500  1.0
  Sm  Sm5  1  0.187  0.719  0.500  1.0
  Ni  Ni6  1  0.896  0.806  0.000  1.0
  Ni  Ni7  1  0.910  0.104  0.000  1.0
  Ni  Ni8  1  0.194  0.090  0.000  1.0
  Ni  Ni9  1  0.667  0.333  0.500  1.0
  Ni  Ni10  1  0.848  0.929  0.500  1.0
  Ni  Ni11  1  0.080  0.152  0.500  1.0
  Ni  Ni12  1  0.071  0.920  0.500  1.0
  Ni  Ni13  1  0.333  0.667  0.000  1.0
  Ni  Ni14  1  0.978  0.563  0.000  1.0
  Ni  Ni15  1  0.585  0.022  0.000  1.0
  Ni  Ni16  1  0.437  0.415  0.000  1.0
  Ni  Ni17  1  0.930  0.685  0.500  1.0
  Ni  Ni18  1  0.756  0.070  0.500  1.0
  Ni  Ni19  1  0.315  0.244  0.500  1.0
  Ni  Ni20  1  0.411  0.977  0.500  1.0
  Ni  Ni21  1  0.566  0.589  0.500  1.0
  Ni  Ni22  1  0.023  0.434  0.500  1.0
  Ni  Ni23  1  0.682  0.759  0.000  1.0
  Ni  Ni24  1  0.077  0.318  0.000  1.0
  Ni  Ni25  1  0.241  0.923  0.000  1.0
  P  P26  1  0.866  0.479  0.500  1.0
  P  P27  1  0.613  0.134  0.500  1.0
  P  P28  1  0.521  0.387  0.500  1.0
  P  P29  1  0.769  0.724  0.500  1.0
  P  P30  1  0.955  0.231  0.500  1.0
  P  P31  1  0.276  0.045  0.500  1.0
  P  P32  1  0.386  0.865  0.000  1.0
  P  P33  1  0.479  0.614  0.000  1.0
  P  P34  1  0.135  0.521  0.000  1.0
  P  P35  1  0.720  0.954  0.000  1.0
  P  P36  1  0.234  0.280  0.000  1.0
  P  P37  1  0.046  0.766  0.000  1.0
  P  P38  1  0.000  0.000  0.000  1.0
[/CIF]
.
The crystal structure described by Sm6Ni20P13 crystallizes in the hexagonal P-6 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 16-coordinate geometry to one Ni(1), one Ni(8), two equivalent Ni(2), two equivalent Ni(5), two equivalent Ni(6), two equivalent Ni(7), two equivalent P(2), and four equivalent P(1) atoms. In the second Sm site, Sm(2) is bonded in a 15-coordinate geometry to one Ni(6), two equivalent Ni(4), two equivalent Ni(5), two equivalent Ni(7), two equivalent Ni(8), two equivalent P(4), and four equivalent P(3) atoms. There are eight inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 4-coordinate geometry to one Sm(1), one P(4), one P(5), and two equivalent P(2) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to six equivalent Sm(1) and three equivalent P(1) atoms. In the third Ni site, Ni(3) is bonded in a 5-coordinate geometry to one P(2), two equivalent P(4), and two equivalent P(5) atoms. In the fourth Ni site, Ni(4) is bonded in a distorted trigonal planar geometry to six equivalent Sm(2) and three equivalent P(3) atoms. In the fifth Ni site, Ni(5) is bonded to two equivalent Sm(1), two equivalent Sm(2), one P(3), one P(4), and two equivalent P(1) atoms to form distorted NiSm4P4 tetrahedra that share corners with two equivalent Ni(6)Sm3P4 tetrahedra, corners with two equivalent Ni(5)Sm4P4 tetrahedra, corners with four equivalent Ni(7)Sm4P4 tetrahedra, edges with two equivalent Ni(5)Sm4P4 tetrahedra, faces with two equivalent Ni(6)Sm3P4 tetrahedra, and faces with two equivalent Ni(7)Sm4P4 tetrahedra. In the sixth Ni site, Ni(6) is bonded to one Sm(2), two equivalent Sm(1), one P(1), one P(2), and two equivalent P(4) atoms to form distorted NiSm3P4 tetrahedra that share corners with two equivalent Ni(5)Sm4P4 tetrahedra, corners with three equivalent Ni(7)Sm4P4 tetrahedra,  an edgeedge with one Ni(7)Sm4P4 tetrahedra, edges with two equivalent Ni(6)Sm3P4 tetrahedra,  a faceface with one Ni(7)Sm4P4 tetrahedra, and faces with two equivalent Ni(5)Sm4P4 tetrahedra. In the seventh Ni site, Ni(7) is bonded to two equivalent Sm(1), two equivalent Sm(2), one P(1), one P(2), and two equivalent P(3) atoms to form distorted NiSm4P4 tetrahedra that share corners with two equivalent Ni(7)Sm4P4 tetrahedra, corners with three equivalent Ni(6)Sm3P4 tetrahedra, corners with four equivalent Ni(5)Sm4P4 tetrahedra,  an edgeedge with one Ni(6)Sm3P4 tetrahedra, edges with two equivalent Ni(7)Sm4P4 tetrahedra,  a faceface with one Ni(6)Sm3P4 tetrahedra, and faces with two equivalent Ni(5)Sm4P4 tetrahedra. In the eighth Ni site, Ni(8) is bonded in a 4-coordinate geometry to one Sm(1), two equivalent Sm(2), one P(3), one P(4), and two equivalent P(2) atoms. There are five inequivalent P sites. In the first P site, P(3) is bonded in a 9-coordinate geometry to four equivalent Sm(2), one Ni(4), one Ni(5), one Ni(8), and two equivalent Ni(7) atoms. In the second P site, P(4) is bonded in a 9-coordinate geometry to two equivalent Sm(2), one Ni(1), one Ni(5), one Ni(8), two equivalent Ni(3), and two equivalent Ni(6) atoms. In the third P site, P(5) is bonded in a 9-coordinate geometry to three equivalent Ni(1) and six equivalent Ni(3) atoms. In the fourth P site, P(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Ni(2), one Ni(6), one Ni(7), and two equivalent Ni(5) atoms. In the fifth P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Sm(1), one Ni(3), one Ni(6), one Ni(7), two equivalent Ni(1), and two equivalent Ni(8) atoms. is represented by the CIF file [CIF]
data_Sm6Ni20P13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.781
_cell_length_b   12.781
_cell_length_c   3.816
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   539.757
_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  0.718  0.531  0.000  1.0
  Sm  Sm1  1  0.813  0.282  0.000  1.0
  Sm  Sm2  1  0.469  0.187  0.000  1.0
  Sm  Sm3  1  0.532  0.813  0.500  1.0
  Sm  Sm4  1  0.281  0.468  0.500  1.0
  Sm  Sm5  1  0.187  0.719  0.500  1.0
  Ni  Ni6  1  0.896  0.806  0.000  1.0
  Ni  Ni7  1  0.910  0.104  0.000  1.0
  Ni  Ni8  1  0.194  0.090  0.000  1.0
  Ni  Ni9  1  0.667  0.333  0.500  1.0
  Ni  Ni10  1  0.848  0.929  0.500  1.0
  Ni  Ni11  1  0.080  0.152  0.500  1.0
  Ni  Ni12  1  0.071  0.920  0.500  1.0
  Ni  Ni13  1  0.333  0.667  0.000  1.0
  Ni  Ni14  1  0.978  0.563  0.000  1.0
  Ni  Ni15  1  0.585  0.022  0.000  1.0
  Ni  Ni16  1  0.437  0.415  0.000  1.0
  Ni  Ni17  1  0.930  0.685  0.500  1.0
  Ni  Ni18  1  0.756  0.070  0.500  1.0
  Ni  Ni19  1  0.315  0.244  0.500  1.0
  Ni  Ni20  1  0.411  0.977  0.500  1.0
  Ni  Ni21  1  0.566  0.589  0.500  1.0
  Ni  Ni22  1  0.023  0.434  0.500  1.0
  Ni  Ni23  1  0.682  0.759  0.000  1.0
  Ni  Ni24  1  0.077  0.318  0.000  1.0
  Ni  Ni25  1  0.241  0.923  0.000  1.0
  P  P26  1  0.866  0.479  0.500  1.0
  P  P27  1  0.613  0.134  0.500  1.0
  P  P28  1  0.521  0.387  0.500  1.0
  P  P29  1  0.769  0.724  0.500  1.0
  P  P30  1  0.955  0.231  0.500  1.0
  P  P31  1  0.276  0.045  0.500  1.0
  P  P32  1  0.386  0.865  0.000  1.0
  P  P33  1  0.479  0.614  0.000  1.0
  P  P34  1  0.135  0.521  0.000  1.0
  P  P35  1  0.720  0.954  0.000  1.0
  P  P36  1  0.234  0.280  0.000  1.0
  P  P37  1  0.046  0.766  0.000  1.0
  P  P38  1  0.000  0.000  0.000  1.0
[/CIF]
.