The structure described by Sm2TiCo16 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 one Co(5), three equivalent Co(2), three equivalent Co(3), six equivalent Co(1), and six equivalent Co(4) atoms. In the second Sm site, Sm(2) is bonded in a 19-coordinate geometry to one Ti(1), three equivalent Co(2), three equivalent Co(4), six equivalent Co(1), and six equivalent Co(3) atoms. Ti(1) is bonded in a 14-coordinate geometry to one Sm(2), one Co(5), three equivalent Co(2), three equivalent Co(3), and six equivalent Co(1) atoms. There are five 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 Ti(1), one Co(5), two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), and two equivalent Co(4) atoms. In the second Co site, Co(2) is bonded in a 12-coordinate geometry to one Sm(1), one Sm(2), one Ti(1), one Co(5), two equivalent Co(3), two equivalent Co(4), and four equivalent Co(1) atoms. In the third Co site, Co(3) is bonded to one Sm(1), two equivalent Sm(2), one Ti(1), two equivalent Co(2), two equivalent Co(4), and four equivalent Co(1) atoms to form distorted CoSm3TiCo8 cuboctahedra that share corners with two equivalent Co(3)Sm3TiCo8 cuboctahedra, corners with eight equivalent Co(4)Sm3Co9 cuboctahedra,  an edgeedge with one Co(4)Sm3Co9 cuboctahedra, edges with four equivalent Co(3)Sm3TiCo8 cuboctahedra, faces with three equivalent Co(4)Sm3Co9 cuboctahedra, and faces with four equivalent Co(3)Sm3TiCo8 cuboctahedra. In the fourth Co site, Co(4) is bonded to one Sm(2), two equivalent Sm(1), one Co(5), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(1) atoms to form CoSm3Co9 cuboctahedra that share corners with two equivalent Co(4)Sm3Co9 cuboctahedra, corners with eight equivalent Co(3)Sm3TiCo8 cuboctahedra,  an edgeedge with one Co(3)Sm3TiCo8 cuboctahedra, edges with four equivalent Co(4)Sm3Co9 cuboctahedra, faces with three equivalent Co(3)Sm3TiCo8 cuboctahedra, and faces with four equivalent Co(4)Sm3Co9 cuboctahedra. In the fifth Co site, Co(5) is bonded in a 1-coordinate geometry to one Sm(1), one Ti(1), three equivalent Co(2), three equivalent Co(4), and six equivalent Co(1) atoms. is represented by the CIF card [CIF]
data_Sm2TiCo16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.319
_cell_length_b   6.319
_cell_length_c   6.319
_cell_angle_alpha   82.883
_cell_angle_beta   82.883
_cell_angle_gamma   82.883
_symmetry_Int_Tables_number   1
_cell_volume   246.878
_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  0.655  0.655  0.655  1.0
  Sm  Sm1  1  0.353  0.353  0.353  1.0
  Ti  Ti2  1  0.093  0.093  0.093  1.0
  Co  Co3  1  0.289  0.708  0.997  1.0
  Co  Co4  1  0.708  0.997  0.289  1.0
  Co  Co5  1  0.997  0.289  0.708  1.0
  Co  Co6  1  0.289  0.997  0.708  1.0
  Co  Co7  1  0.997  0.708  0.289  1.0
  Co  Co8  1  0.708  0.289  0.997  1.0
  Co  Co9  1  0.997  0.997  0.505  1.0
  Co  Co10  1  0.997  0.505  0.997  1.0
  Co  Co11  1  0.505  0.997  0.997  1.0
  Co  Co12  1  0.345  0.345  0.847  1.0
  Co  Co13  1  0.345  0.847  0.345  1.0
  Co  Co14  1  0.847  0.345  0.345  1.0
  Co  Co15  1  0.662  0.662  0.152  1.0
  Co  Co16  1  0.662  0.152  0.662  1.0
  Co  Co17  1  0.152  0.662  0.662  1.0
  Co  Co18  1  0.899  0.899  0.899  1.0
[/CIF]
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The structure described by Sm2TiCo16 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 one Co(5), three equivalent Co(2), three equivalent Co(3), six equivalent Co(1), and six equivalent Co(4) atoms. In the second Sm site, Sm(2) is bonded in a 19-coordinate geometry to one Ti(1), three equivalent Co(2), three equivalent Co(4), six equivalent Co(1), and six equivalent Co(3) atoms. Ti(1) is bonded in a 14-coordinate geometry to one Sm(2), one Co(5), three equivalent Co(2), three equivalent Co(3), and six equivalent Co(1) atoms. There are five 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 Ti(1), one Co(5), two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), and two equivalent Co(4) atoms. In the second Co site, Co(2) is bonded in a 12-coordinate geometry to one Sm(1), one Sm(2), one Ti(1), one Co(5), two equivalent Co(3), two equivalent Co(4), and four equivalent Co(1) atoms. In the third Co site, Co(3) is bonded to one Sm(1), two equivalent Sm(2), one Ti(1), two equivalent Co(2), two equivalent Co(4), and four equivalent Co(1) atoms to form distorted CoSm3TiCo8 cuboctahedra that share corners with two equivalent Co(3)Sm3TiCo8 cuboctahedra, corners with eight equivalent Co(4)Sm3Co9 cuboctahedra,  an edgeedge with one Co(4)Sm3Co9 cuboctahedra, edges with four equivalent Co(3)Sm3TiCo8 cuboctahedra, faces with three equivalent Co(4)Sm3Co9 cuboctahedra, and faces with four equivalent Co(3)Sm3TiCo8 cuboctahedra. In the fourth Co site, Co(4) is bonded to one Sm(2), two equivalent Sm(1), one Co(5), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(1) atoms to form CoSm3Co9 cuboctahedra that share corners with two equivalent Co(4)Sm3Co9 cuboctahedra, corners with eight equivalent Co(3)Sm3TiCo8 cuboctahedra,  an edgeedge with one Co(3)Sm3TiCo8 cuboctahedra, edges with four equivalent Co(4)Sm3Co9 cuboctahedra, faces with three equivalent Co(3)Sm3TiCo8 cuboctahedra, and faces with four equivalent Co(4)Sm3Co9 cuboctahedra. In the fifth Co site, Co(5) is bonded in a 1-coordinate geometry to one Sm(1), one Ti(1), three equivalent Co(2), three equivalent Co(4), and six equivalent Co(1) atoms. is represented by the CIF card [CIF]
data_Sm2TiCo16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.319
_cell_length_b   6.319
_cell_length_c   6.319
_cell_angle_alpha   82.883
_cell_angle_beta   82.883
_cell_angle_gamma   82.883
_symmetry_Int_Tables_number   1
_cell_volume   246.878
_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  0.655  0.655  0.655  1.0
  Sm  Sm1  1  0.353  0.353  0.353  1.0
  Ti  Ti2  1  0.093  0.093  0.093  1.0
  Co  Co3  1  0.289  0.708  0.997  1.0
  Co  Co4  1  0.708  0.997  0.289  1.0
  Co  Co5  1  0.997  0.289  0.708  1.0
  Co  Co6  1  0.289  0.997  0.708  1.0
  Co  Co7  1  0.997  0.708  0.289  1.0
  Co  Co8  1  0.708  0.289  0.997  1.0
  Co  Co9  1  0.997  0.997  0.505  1.0
  Co  Co10  1  0.997  0.505  0.997  1.0
  Co  Co11  1  0.505  0.997  0.997  1.0
  Co  Co12  1  0.345  0.345  0.847  1.0
  Co  Co13  1  0.345  0.847  0.345  1.0
  Co  Co14  1  0.847  0.345  0.345  1.0
  Co  Co15  1  0.662  0.662  0.152  1.0
  Co  Co16  1  0.662  0.152  0.662  1.0
  Co  Co17  1  0.152  0.662  0.662  1.0
  Co  Co18  1  0.899  0.899  0.899  1.0
[/CIF]
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