The compound described by Tm2Co17 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a 18-coordinate geometry to six equivalent Co(3) and twelve equivalent Co(4) atoms. In the second Tm site, Tm(2) is bonded in a 20-coordinate geometry to two equivalent Co(1), six equivalent Co(2), six equivalent Co(3), and six equivalent Co(4) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 14-coordinate geometry to one Tm(2), one Co(1), three equivalent Co(2), three equivalent Co(4), and six equivalent Co(3) atoms. In the second Co site, Co(2) is bonded to two equivalent Tm(2), two equivalent Co(1), four equivalent Co(3), and four equivalent Co(4) atoms to form CoTm2Co10 cuboctahedra that share corners with four equivalent Co(2)Tm2Co10 cuboctahedra, corners with ten equivalent Co(4)Tm3Co9 cuboctahedra, edges with six equivalent Co(4)Tm3Co9 cuboctahedra, faces with four equivalent Co(4)Tm3Co9 cuboctahedra, and faces with six equivalent Co(2)Tm2Co10 cuboctahedra. In the third Co site, Co(3) is bonded in a 12-coordinate geometry to one Tm(1), one Tm(2), two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(4) atoms. In the fourth Co site, Co(4) is bonded to one Tm(2), two equivalent Tm(1), one Co(1), two equivalent Co(2), two equivalent Co(4), and four equivalent Co(3) atoms to form distorted CoTm3Co9 cuboctahedra that share corners with five equivalent Co(2)Tm2Co10 cuboctahedra, corners with ten equivalent Co(4)Tm3Co9 cuboctahedra, edges with three equivalent Co(2)Tm2Co10 cuboctahedra, edges with five equivalent Co(4)Tm3Co9 cuboctahedra, faces with two equivalent Co(2)Tm2Co10 cuboctahedra, and faces with eight equivalent Co(4)Tm3Co9 cuboctahedra. is represented by the CIF card [CIF]
data_Tm2Co17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.939
_cell_length_b   8.160
_cell_length_c   8.160
_cell_angle_alpha   120.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   457.828
_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
  Tm  Tm0  1  0.750  1.000  0.000  1.0
  Tm  Tm1  1  0.250  0.000  1.000  1.0
  Tm  Tm2  1  0.250  0.667  0.333  1.0
  Tm  Tm3  1  0.750  0.333  0.667  1.0
  Co  Co4  1  0.608  0.667  0.333  1.0
  Co  Co5  1  0.392  0.333  0.667  1.0
  Co  Co6  1  0.108  0.333  0.667  1.0
  Co  Co7  1  0.892  0.667  0.333  1.0
  Co  Co8  1  0.500  0.500  0.000  1.0
  Co  Co9  1  0.500  0.500  0.500  1.0
  Co  Co10  1  0.500  0.000  0.500  1.0
  Co  Co11  1  0.000  0.500  0.000  1.0
  Co  Co12  1  0.000  0.500  0.500  1.0
  Co  Co13  1  0.000  0.000  0.500  1.0
  Co  Co14  1  0.750  0.671  0.044  1.0
  Co  Co15  1  0.750  0.373  0.329  1.0
  Co  Co16  1  0.750  0.957  0.627  1.0
  Co  Co17  1  0.750  0.373  0.043  1.0
  Co  Co18  1  0.750  0.956  0.329  1.0
  Co  Co19  1  0.750  0.671  0.627  1.0
  Co  Co20  1  0.250  0.329  0.956  1.0
  Co  Co21  1  0.250  0.627  0.671  1.0
  Co  Co22  1  0.250  0.043  0.373  1.0
  Co  Co23  1  0.250  0.627  0.957  1.0
  Co  Co24  1  0.250  0.044  0.671  1.0
  Co  Co25  1  0.250  0.329  0.373  1.0
  Co  Co26  1  0.478  0.835  0.670  1.0
  Co  Co27  1  0.478  0.835  0.165  1.0
  Co  Co28  1  0.478  0.330  0.165  1.0
  Co  Co29  1  0.522  0.165  0.330  1.0
  Co  Co30  1  0.522  0.165  0.835  1.0
  Co  Co31  1  0.522  0.670  0.835  1.0
  Co  Co32  1  0.978  0.165  0.330  1.0
  Co  Co33  1  0.978  0.165  0.835  1.0
  Co  Co34  1  0.978  0.670  0.835  1.0
  Co  Co35  1  0.022  0.835  0.670  1.0
  Co  Co36  1  0.022  0.835  0.165  1.0
  Co  Co37  1  0.022  0.330  0.165  1.0
[/CIF]
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The compound described by Tm2Co17 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a 18-coordinate geometry to six equivalent Co(3) and twelve equivalent Co(4) atoms. In the second Tm site, Tm(2) is bonded in a 20-coordinate geometry to two equivalent Co(1), six equivalent Co(2), six equivalent Co(3), and six equivalent Co(4) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 14-coordinate geometry to one Tm(2), one Co(1), three equivalent Co(2), three equivalent Co(4), and six equivalent Co(3) atoms. In the second Co site, Co(2) is bonded to two equivalent Tm(2), two equivalent Co(1), four equivalent Co(3), and four equivalent Co(4) atoms to form CoTm2Co10 cuboctahedra that share corners with four equivalent Co(2)Tm2Co10 cuboctahedra, corners with ten equivalent Co(4)Tm3Co9 cuboctahedra, edges with six equivalent Co(4)Tm3Co9 cuboctahedra, faces with four equivalent Co(4)Tm3Co9 cuboctahedra, and faces with six equivalent Co(2)Tm2Co10 cuboctahedra. In the third Co site, Co(3) is bonded in a 12-coordinate geometry to one Tm(1), one Tm(2), two equivalent Co(1), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(4) atoms. In the fourth Co site, Co(4) is bonded to one Tm(2), two equivalent Tm(1), one Co(1), two equivalent Co(2), two equivalent Co(4), and four equivalent Co(3) atoms to form distorted CoTm3Co9 cuboctahedra that share corners with five equivalent Co(2)Tm2Co10 cuboctahedra, corners with ten equivalent Co(4)Tm3Co9 cuboctahedra, edges with three equivalent Co(2)Tm2Co10 cuboctahedra, edges with five equivalent Co(4)Tm3Co9 cuboctahedra, faces with two equivalent Co(2)Tm2Co10 cuboctahedra, and faces with eight equivalent Co(4)Tm3Co9 cuboctahedra. is represented by the CIF card [CIF]
data_Tm2Co17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.939
_cell_length_b   8.160
_cell_length_c   8.160
_cell_angle_alpha   120.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   457.828
_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
  Tm  Tm0  1  0.750  1.000  0.000  1.0
  Tm  Tm1  1  0.250  0.000  1.000  1.0
  Tm  Tm2  1  0.250  0.667  0.333  1.0
  Tm  Tm3  1  0.750  0.333  0.667  1.0
  Co  Co4  1  0.608  0.667  0.333  1.0
  Co  Co5  1  0.392  0.333  0.667  1.0
  Co  Co6  1  0.108  0.333  0.667  1.0
  Co  Co7  1  0.892  0.667  0.333  1.0
  Co  Co8  1  0.500  0.500  0.000  1.0
  Co  Co9  1  0.500  0.500  0.500  1.0
  Co  Co10  1  0.500  0.000  0.500  1.0
  Co  Co11  1  0.000  0.500  0.000  1.0
  Co  Co12  1  0.000  0.500  0.500  1.0
  Co  Co13  1  0.000  0.000  0.500  1.0
  Co  Co14  1  0.750  0.671  0.044  1.0
  Co  Co15  1  0.750  0.373  0.329  1.0
  Co  Co16  1  0.750  0.957  0.627  1.0
  Co  Co17  1  0.750  0.373  0.043  1.0
  Co  Co18  1  0.750  0.956  0.329  1.0
  Co  Co19  1  0.750  0.671  0.627  1.0
  Co  Co20  1  0.250  0.329  0.956  1.0
  Co  Co21  1  0.250  0.627  0.671  1.0
  Co  Co22  1  0.250  0.043  0.373  1.0
  Co  Co23  1  0.250  0.627  0.957  1.0
  Co  Co24  1  0.250  0.044  0.671  1.0
  Co  Co25  1  0.250  0.329  0.373  1.0
  Co  Co26  1  0.478  0.835  0.670  1.0
  Co  Co27  1  0.478  0.835  0.165  1.0
  Co  Co28  1  0.478  0.330  0.165  1.0
  Co  Co29  1  0.522  0.165  0.330  1.0
  Co  Co30  1  0.522  0.165  0.835  1.0
  Co  Co31  1  0.522  0.670  0.835  1.0
  Co  Co32  1  0.978  0.165  0.330  1.0
  Co  Co33  1  0.978  0.165  0.835  1.0
  Co  Co34  1  0.978  0.670  0.835  1.0
  Co  Co35  1  0.022  0.835  0.670  1.0
  Co  Co36  1  0.022  0.835  0.165  1.0
  Co  Co37  1  0.022  0.330  0.165  1.0
[/CIF]
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