The crystal structure described by SmYCo17 crystallizes in the trigonal R3m space group. Sm(1) is bonded in a 19-coordinate geometry to one Co(6), three equivalent Co(2), three equivalent Co(4), six equivalent Co(1), and six equivalent Co(3) atoms. Y(1) is bonded in a 19-coordinate geometry to one Co(5), three equivalent Co(1), three equivalent Co(4), six equivalent Co(2), and six equivalent Co(3) atoms. There are six inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent Sm(1), one Y(1), one Co(6), two equivalent Co(2), two equivalent Co(4), and four equivalent Co(3) atoms to form CoSm2YCo9 cuboctahedra that share corners with two equivalent Co(1)Sm2YCo9 cuboctahedra, corners with five equivalent Co(4)SmYCo10 cuboctahedra, corners with eight equivalent Co(2)SmY2Co9 cuboctahedra, corners with eight equivalent Co(3)SmYCo10 cuboctahedra,  an edgeedge with one Co(2)SmY2Co9 cuboctahedra, edges with two equivalent Co(3)SmYCo10 cuboctahedra, edges with three equivalent Co(4)SmYCo10 cuboctahedra, edges with four equivalent Co(1)Sm2YCo9 cuboctahedra, faces with three equivalent Co(2)SmY2Co9 cuboctahedra, faces with three equivalent Co(4)SmYCo10 cuboctahedra, faces with four equivalent Co(1)Sm2YCo9 cuboctahedra, and faces with ten equivalent Co(3)SmYCo10 cuboctahedra. In the second Co site, Co(2) is bonded to one Sm(1), two equivalent Y(1), one Co(5), two equivalent Co(1), two equivalent Co(4), and four equivalent Co(3) atoms to form CoSmY2Co9 cuboctahedra that share corners with two equivalent Co(2)SmY2Co9 cuboctahedra, corners with five equivalent Co(4)SmYCo10 cuboctahedra, corners with eight equivalent Co(1)Sm2YCo9 cuboctahedra, corners with eight equivalent Co(3)SmYCo10 cuboctahedra,  an edgeedge with one Co(1)Sm2YCo9 cuboctahedra, edges with two equivalent Co(3)SmYCo10 cuboctahedra, edges with three equivalent Co(4)SmYCo10 cuboctahedra, edges with four equivalent Co(2)SmY2Co9 cuboctahedra, faces with three equivalent Co(1)Sm2YCo9 cuboctahedra, faces with three equivalent Co(4)SmYCo10 cuboctahedra, faces with four equivalent Co(2)SmY2Co9 cuboctahedra, and faces with ten equivalent Co(3)SmYCo10 cuboctahedra. In the third Co site, Co(3) is bonded to one Sm(1), one Y(1), one Co(5), one Co(6), two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), and two equivalent Co(4) atoms to form distorted CoSmYCo10 cuboctahedra that share corners with four equivalent Co(1)Sm2YCo9 cuboctahedra, corners with four equivalent Co(2)SmY2Co9 cuboctahedra, corners with four equivalent Co(4)SmYCo10 cuboctahedra, corners with twelve equivalent Co(3)SmYCo10 cuboctahedra,  an edgeedge with one Co(1)Sm2YCo9 cuboctahedra,  an edgeedge with one Co(2)SmY2Co9 cuboctahedra,  an edgeedge with one Co(3)SmYCo10 cuboctahedra, edges with two equivalent Co(4)SmYCo10 cuboctahedra, faces with four equivalent Co(4)SmYCo10 cuboctahedra, faces with five equivalent Co(1)Sm2YCo9 cuboctahedra, faces with five equivalent Co(2)SmY2Co9 cuboctahedra, and faces with seven equivalent Co(3)SmYCo10 cuboctahedra. In the fourth Co site, Co(4) is bonded to one Sm(1), one Y(1), one Co(5), one Co(6), two equivalent Co(1), two equivalent Co(2), and four equivalent Co(3) atoms to form CoSmYCo10 cuboctahedra that share corners with four equivalent Co(4)SmYCo10 cuboctahedra, corners with five equivalent Co(1)Sm2YCo9 cuboctahedra, corners with five equivalent Co(2)SmY2Co9 cuboctahedra, corners with eight equivalent Co(3)SmYCo10 cuboctahedra, edges with three equivalent Co(1)Sm2YCo9 cuboctahedra, edges with three equivalent Co(2)SmY2Co9 cuboctahedra, edges with four equivalent Co(3)SmYCo10 cuboctahedra, faces with three equivalent Co(1)Sm2YCo9 cuboctahedra, faces with three equivalent Co(2)SmY2Co9 cuboctahedra, faces with four equivalent Co(4)SmYCo10 cuboctahedra, and faces with eight equivalent Co(3)SmYCo10 cuboctahedra. In the fifth Co site, Co(5) is bonded in a 14-coordinate geometry to one Y(1), one Co(6), three equivalent Co(2), three equivalent Co(4), and six equivalent Co(3) atoms. In the sixth Co site, Co(6) is bonded in a 14-coordinate geometry to one Sm(1), one Co(5), three equivalent Co(1), three equivalent Co(4), and six equivalent Co(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmYCo17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.261
_cell_length_b   6.261
_cell_length_c   6.261
_cell_angle_alpha   82.901
_cell_angle_beta   82.900
_cell_angle_gamma   82.900
_symmetry_Int_Tables_number   1
_cell_volume   240.198
_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  0.344  0.344  0.344  1.0
  Y  Y1  1  0.657  0.657  0.657  1.0
  Co  Co2  1  0.343  0.343  0.847  1.0
  Co  Co3  1  0.847  0.343  0.343  1.0
  Co  Co4  1  0.343  0.847  0.343  1.0
  Co  Co5  1  0.658  0.658  0.153  1.0
  Co  Co6  1  0.153  0.658  0.658  1.0
  Co  Co7  1  0.658  0.153  0.658  1.0
  Co  Co8  1  0.711  0.289  0.999  1.0
  Co  Co9  1  0.999  0.711  0.289  1.0
  Co  Co10  1  0.289  0.999  0.711  1.0
  Co  Co11  1  0.999  0.289  0.711  1.0
  Co  Co12  1  0.711  0.999  0.289  1.0
  Co  Co13  1  0.289  0.711  0.999  1.0
  Co  Co14  1  0.999  0.999  0.500  1.0
  Co  Co15  1  0.500  0.999  0.999  1.0
  Co  Co16  1  0.999  0.500  0.999  1.0
  Co  Co17  1  0.905  0.905  0.905  1.0
  Co  Co18  1  0.094  0.094  0.094  1.0
[/CIF]
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The crystal structure described by SmYCo17 crystallizes in the trigonal R3m space group. Sm(1) is bonded in a 19-coordinate geometry to one Co(6), three equivalent Co(2), three equivalent Co(4), six equivalent Co(1), and six equivalent Co(3) atoms. Y(1) is bonded in a 19-coordinate geometry to one Co(5), three equivalent Co(1), three equivalent Co(4), six equivalent Co(2), and six equivalent Co(3) atoms. There are six inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent Sm(1), one Y(1), one Co(6), two equivalent Co(2), two equivalent Co(4), and four equivalent Co(3) atoms to form CoSm2YCo9 cuboctahedra that share corners with two equivalent Co(1)Sm2YCo9 cuboctahedra, corners with five equivalent Co(4)SmYCo10 cuboctahedra, corners with eight equivalent Co(2)SmY2Co9 cuboctahedra, corners with eight equivalent Co(3)SmYCo10 cuboctahedra,  an edgeedge with one Co(2)SmY2Co9 cuboctahedra, edges with two equivalent Co(3)SmYCo10 cuboctahedra, edges with three equivalent Co(4)SmYCo10 cuboctahedra, edges with four equivalent Co(1)Sm2YCo9 cuboctahedra, faces with three equivalent Co(2)SmY2Co9 cuboctahedra, faces with three equivalent Co(4)SmYCo10 cuboctahedra, faces with four equivalent Co(1)Sm2YCo9 cuboctahedra, and faces with ten equivalent Co(3)SmYCo10 cuboctahedra. In the second Co site, Co(2) is bonded to one Sm(1), two equivalent Y(1), one Co(5), two equivalent Co(1), two equivalent Co(4), and four equivalent Co(3) atoms to form CoSmY2Co9 cuboctahedra that share corners with two equivalent Co(2)SmY2Co9 cuboctahedra, corners with five equivalent Co(4)SmYCo10 cuboctahedra, corners with eight equivalent Co(1)Sm2YCo9 cuboctahedra, corners with eight equivalent Co(3)SmYCo10 cuboctahedra,  an edgeedge with one Co(1)Sm2YCo9 cuboctahedra, edges with two equivalent Co(3)SmYCo10 cuboctahedra, edges with three equivalent Co(4)SmYCo10 cuboctahedra, edges with four equivalent Co(2)SmY2Co9 cuboctahedra, faces with three equivalent Co(1)Sm2YCo9 cuboctahedra, faces with three equivalent Co(4)SmYCo10 cuboctahedra, faces with four equivalent Co(2)SmY2Co9 cuboctahedra, and faces with ten equivalent Co(3)SmYCo10 cuboctahedra. In the third Co site, Co(3) is bonded to one Sm(1), one Y(1), one Co(5), one Co(6), two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), and two equivalent Co(4) atoms to form distorted CoSmYCo10 cuboctahedra that share corners with four equivalent Co(1)Sm2YCo9 cuboctahedra, corners with four equivalent Co(2)SmY2Co9 cuboctahedra, corners with four equivalent Co(4)SmYCo10 cuboctahedra, corners with twelve equivalent Co(3)SmYCo10 cuboctahedra,  an edgeedge with one Co(1)Sm2YCo9 cuboctahedra,  an edgeedge with one Co(2)SmY2Co9 cuboctahedra,  an edgeedge with one Co(3)SmYCo10 cuboctahedra, edges with two equivalent Co(4)SmYCo10 cuboctahedra, faces with four equivalent Co(4)SmYCo10 cuboctahedra, faces with five equivalent Co(1)Sm2YCo9 cuboctahedra, faces with five equivalent Co(2)SmY2Co9 cuboctahedra, and faces with seven equivalent Co(3)SmYCo10 cuboctahedra. In the fourth Co site, Co(4) is bonded to one Sm(1), one Y(1), one Co(5), one Co(6), two equivalent Co(1), two equivalent Co(2), and four equivalent Co(3) atoms to form CoSmYCo10 cuboctahedra that share corners with four equivalent Co(4)SmYCo10 cuboctahedra, corners with five equivalent Co(1)Sm2YCo9 cuboctahedra, corners with five equivalent Co(2)SmY2Co9 cuboctahedra, corners with eight equivalent Co(3)SmYCo10 cuboctahedra, edges with three equivalent Co(1)Sm2YCo9 cuboctahedra, edges with three equivalent Co(2)SmY2Co9 cuboctahedra, edges with four equivalent Co(3)SmYCo10 cuboctahedra, faces with three equivalent Co(1)Sm2YCo9 cuboctahedra, faces with three equivalent Co(2)SmY2Co9 cuboctahedra, faces with four equivalent Co(4)SmYCo10 cuboctahedra, and faces with eight equivalent Co(3)SmYCo10 cuboctahedra. In the fifth Co site, Co(5) is bonded in a 14-coordinate geometry to one Y(1), one Co(6), three equivalent Co(2), three equivalent Co(4), and six equivalent Co(3) atoms. In the sixth Co site, Co(6) is bonded in a 14-coordinate geometry to one Sm(1), one Co(5), three equivalent Co(1), three equivalent Co(4), and six equivalent Co(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmYCo17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.261
_cell_length_b   6.261
_cell_length_c   6.261
_cell_angle_alpha   82.901
_cell_angle_beta   82.900
_cell_angle_gamma   82.900
_symmetry_Int_Tables_number   1
_cell_volume   240.198
_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  0.344  0.344  0.344  1.0
  Y  Y1  1  0.657  0.657  0.657  1.0
  Co  Co2  1  0.343  0.343  0.847  1.0
  Co  Co3  1  0.847  0.343  0.343  1.0
  Co  Co4  1  0.343  0.847  0.343  1.0
  Co  Co5  1  0.658  0.658  0.153  1.0
  Co  Co6  1  0.153  0.658  0.658  1.0
  Co  Co7  1  0.658  0.153  0.658  1.0
  Co  Co8  1  0.711  0.289  0.999  1.0
  Co  Co9  1  0.999  0.711  0.289  1.0
  Co  Co10  1  0.289  0.999  0.711  1.0
  Co  Co11  1  0.999  0.289  0.711  1.0
  Co  Co12  1  0.711  0.999  0.289  1.0
  Co  Co13  1  0.289  0.711  0.999  1.0
  Co  Co14  1  0.999  0.999  0.500  1.0
  Co  Co15  1  0.500  0.999  0.999  1.0
  Co  Co16  1  0.999  0.500  0.999  1.0
  Co  Co17  1  0.905  0.905  0.905  1.0
  Co  Co18  1  0.094  0.094  0.094  1.0
[/CIF]
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