The material structure described by Tm2Co7 crystallizes in the trigonal R-3m space group. There are six inequivalent Tm sites. In the first Tm site, Tm(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 Tm site, Tm(1) is bonded in a 18-coordinate geometry to three equivalent Co(2); three equivalent Co(3); six Co(4,4,4); and six equivalent Co(5) atoms. In the third Tm site, Tm(2) is bonded in a 12-coordinate geometry to three equivalent Co(1) and nine equivalent Co(5) atoms. In the fourth Tm site, Tm(1) is bonded in a 18-coordinate geometry to three equivalent Co(2); three equivalent Co(3); six Co(4,4,4); and six equivalent Co(5) atoms. In the fifth Tm site, Tm(1) is bonded in a 18-coordinate geometry to three equivalent Co(2); three equivalent Co(3); six Co(4,4,4); and six equivalent Co(5) atoms. In the sixth Tm site, Tm(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. There are eight inequivalent Co sites. In the first Co site, Co(4) is bonded to four Tm(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoTm4Co8 cuboctahedra that share corners with four equivalent Co(4)Tm4Co8 cuboctahedra; corners with twelve equivalent Co(5)Tm5Co7 cuboctahedra; edges with two equivalent Co(4)Tm4Co8 cuboctahedra; edges with eight equivalent Co(5)Tm5Co7 cuboctahedra; faces with two equivalent Co(5)Tm5Co7 cuboctahedra; and faces with eight Co(4,4)Tm4Co8 cuboctahedra. In the second Co site, Co(4) is bonded to four Tm(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoTm4Co8 cuboctahedra that share corners with four equivalent Co(4)Tm4Co8 cuboctahedra; corners with twelve equivalent Co(5)Tm5Co7 cuboctahedra; edges with two equivalent Co(4)Tm4Co8 cuboctahedra; edges with eight equivalent Co(5)Tm5Co7 cuboctahedra; faces with two equivalent Co(5)Tm5Co7 cuboctahedra; and faces with eight Co(4,4)Tm4Co8 cuboctahedra. In the third Co site, Co(1) is bonded to six equivalent Tm(2) and six equivalent Co(5) atoms to form CoTm6Co6 cuboctahedra that share corners with twelve equivalent Co(5)Tm5Co7 cuboctahedra, edges with six equivalent Co(1)Tm6Co6 cuboctahedra, and faces with eighteen equivalent Co(5)Tm5Co7 cuboctahedra. In the fourth Co site, Co(2) is bonded in a 9-coordinate geometry to three equivalent Tm(1); three Co(4,4,4); and three equivalent Co(5) atoms. In the fifth Co site, Co(3) is bonded in a 9-coordinate geometry to three equivalent Tm(1), three equivalent Co(4), and three equivalent Co(5) atoms. In the sixth Co site, Co(4) is bonded to four Tm(1,1); two equivalent Co(2); two equivalent Co(3); and four equivalent Co(4) atoms to form CoTm4Co8 cuboctahedra that share corners with four equivalent Co(4)Tm4Co8 cuboctahedra, corners with twelve equivalent Co(5)Tm5Co7 cuboctahedra, edges with two equivalent Co(4)Tm4Co8 cuboctahedra, edges with eight equivalent Co(5)Tm5Co7 cuboctahedra, faces with two equivalent Co(5)Tm5Co7 cuboctahedra, and faces with eight equivalent Co(4)Tm4Co8 cuboctahedra. In the seventh Co site, Co(5) is bonded to two equivalent Tm(1), three equivalent Tm(2), one Co(1), one Co(2), one Co(3), and four equivalent Co(5) atoms to form distorted CoTm5Co7 cuboctahedra that share corners with two equivalent Co(1)Tm6Co6 cuboctahedra, corners with six equivalent Co(4)Tm4Co8 cuboctahedra, corners with nine equivalent Co(5)Tm5Co7 cuboctahedra, edges with four equivalent Co(4)Tm4Co8 cuboctahedra, edges with four equivalent Co(5)Tm5Co7 cuboctahedra,  a faceface with one Co(4)Tm4Co8 cuboctahedra, faces with three equivalent Co(1)Tm6Co6 cuboctahedra, and faces with ten equivalent Co(5)Tm5Co7 cuboctahedra. In the eighth Co site, Co(4) is bonded to four Tm(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoTm4Co8 cuboctahedra that share corners with four equivalent Co(4)Tm4Co8 cuboctahedra; corners with twelve equivalent Co(5)Tm5Co7 cuboctahedra; edges with two equivalent Co(4)Tm4Co8 cuboctahedra; edges with eight equivalent Co(5)Tm5Co7 cuboctahedra; faces with two equivalent Co(5)Tm5Co7 cuboctahedra; and faces with eight Co(4,4)Tm4Co8 cuboctahedra. is represented by the CIF card [CIF]
data_Tm2Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.929
_cell_length_b   4.929
_cell_length_c   12.362
_cell_angle_alpha   78.500
_cell_angle_beta   78.500
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   253.103
_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  0.948  0.948  0.155  1.0
  Tm  Tm1  1  0.052  0.052  0.845  1.0
  Tm  Tm2  1  0.851  0.851  0.446  1.0
  Tm  Tm3  1  0.149  0.149  0.554  1.0
  Co  Co4  1  0.500  0.500  0.500  1.0
  Co  Co5  1  0.722  0.722  0.835  1.0
  Co  Co6  1  0.278  0.278  0.165  1.0
  Co  Co7  1  0.611  0.611  0.167  1.0
  Co  Co8  1  0.389  0.389  0.833  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  0.390  0.390  0.329  1.0
  Co  Co13  1  0.891  0.390  0.329  1.0
  Co  Co14  1  0.390  0.891  0.329  1.0
  Co  Co15  1  0.610  0.610  0.671  1.0
  Co  Co16  1  0.109  0.610  0.671  1.0
  Co  Co17  1  0.610  0.109  0.671  1.0
[/CIF]
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The material structure described by Tm2Co7 crystallizes in the trigonal R-3m space group. There are six inequivalent Tm sites. In the first Tm site, Tm(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 Tm site, Tm(1) is bonded in a 18-coordinate geometry to three equivalent Co(2); three equivalent Co(3); six Co(4,4,4); and six equivalent Co(5) atoms. In the third Tm site, Tm(2) is bonded in a 12-coordinate geometry to three equivalent Co(1) and nine equivalent Co(5) atoms. In the fourth Tm site, Tm(1) is bonded in a 18-coordinate geometry to three equivalent Co(2); three equivalent Co(3); six Co(4,4,4); and six equivalent Co(5) atoms. In the fifth Tm site, Tm(1) is bonded in a 18-coordinate geometry to three equivalent Co(2); three equivalent Co(3); six Co(4,4,4); and six equivalent Co(5) atoms. In the sixth Tm site, Tm(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. There are eight inequivalent Co sites. In the first Co site, Co(4) is bonded to four Tm(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoTm4Co8 cuboctahedra that share corners with four equivalent Co(4)Tm4Co8 cuboctahedra; corners with twelve equivalent Co(5)Tm5Co7 cuboctahedra; edges with two equivalent Co(4)Tm4Co8 cuboctahedra; edges with eight equivalent Co(5)Tm5Co7 cuboctahedra; faces with two equivalent Co(5)Tm5Co7 cuboctahedra; and faces with eight Co(4,4)Tm4Co8 cuboctahedra. In the second Co site, Co(4) is bonded to four Tm(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoTm4Co8 cuboctahedra that share corners with four equivalent Co(4)Tm4Co8 cuboctahedra; corners with twelve equivalent Co(5)Tm5Co7 cuboctahedra; edges with two equivalent Co(4)Tm4Co8 cuboctahedra; edges with eight equivalent Co(5)Tm5Co7 cuboctahedra; faces with two equivalent Co(5)Tm5Co7 cuboctahedra; and faces with eight Co(4,4)Tm4Co8 cuboctahedra. In the third Co site, Co(1) is bonded to six equivalent Tm(2) and six equivalent Co(5) atoms to form CoTm6Co6 cuboctahedra that share corners with twelve equivalent Co(5)Tm5Co7 cuboctahedra, edges with six equivalent Co(1)Tm6Co6 cuboctahedra, and faces with eighteen equivalent Co(5)Tm5Co7 cuboctahedra. In the fourth Co site, Co(2) is bonded in a 9-coordinate geometry to three equivalent Tm(1); three Co(4,4,4); and three equivalent Co(5) atoms. In the fifth Co site, Co(3) is bonded in a 9-coordinate geometry to three equivalent Tm(1), three equivalent Co(4), and three equivalent Co(5) atoms. In the sixth Co site, Co(4) is bonded to four Tm(1,1); two equivalent Co(2); two equivalent Co(3); and four equivalent Co(4) atoms to form CoTm4Co8 cuboctahedra that share corners with four equivalent Co(4)Tm4Co8 cuboctahedra, corners with twelve equivalent Co(5)Tm5Co7 cuboctahedra, edges with two equivalent Co(4)Tm4Co8 cuboctahedra, edges with eight equivalent Co(5)Tm5Co7 cuboctahedra, faces with two equivalent Co(5)Tm5Co7 cuboctahedra, and faces with eight equivalent Co(4)Tm4Co8 cuboctahedra. In the seventh Co site, Co(5) is bonded to two equivalent Tm(1), three equivalent Tm(2), one Co(1), one Co(2), one Co(3), and four equivalent Co(5) atoms to form distorted CoTm5Co7 cuboctahedra that share corners with two equivalent Co(1)Tm6Co6 cuboctahedra, corners with six equivalent Co(4)Tm4Co8 cuboctahedra, corners with nine equivalent Co(5)Tm5Co7 cuboctahedra, edges with four equivalent Co(4)Tm4Co8 cuboctahedra, edges with four equivalent Co(5)Tm5Co7 cuboctahedra,  a faceface with one Co(4)Tm4Co8 cuboctahedra, faces with three equivalent Co(1)Tm6Co6 cuboctahedra, and faces with ten equivalent Co(5)Tm5Co7 cuboctahedra. In the eighth Co site, Co(4) is bonded to four Tm(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoTm4Co8 cuboctahedra that share corners with four equivalent Co(4)Tm4Co8 cuboctahedra; corners with twelve equivalent Co(5)Tm5Co7 cuboctahedra; edges with two equivalent Co(4)Tm4Co8 cuboctahedra; edges with eight equivalent Co(5)Tm5Co7 cuboctahedra; faces with two equivalent Co(5)Tm5Co7 cuboctahedra; and faces with eight Co(4,4)Tm4Co8 cuboctahedra. is represented by the CIF card [CIF]
data_Tm2Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.929
_cell_length_b   4.929
_cell_length_c   12.362
_cell_angle_alpha   78.500
_cell_angle_beta   78.500
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   253.103
_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  0.948  0.948  0.155  1.0
  Tm  Tm1  1  0.052  0.052  0.845  1.0
  Tm  Tm2  1  0.851  0.851  0.446  1.0
  Tm  Tm3  1  0.149  0.149  0.554  1.0
  Co  Co4  1  0.500  0.500  0.500  1.0
  Co  Co5  1  0.722  0.722  0.835  1.0
  Co  Co6  1  0.278  0.278  0.165  1.0
  Co  Co7  1  0.611  0.611  0.167  1.0
  Co  Co8  1  0.389  0.389  0.833  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  0.390  0.390  0.329  1.0
  Co  Co13  1  0.891  0.390  0.329  1.0
  Co  Co14  1  0.390  0.891  0.329  1.0
  Co  Co15  1  0.610  0.610  0.671  1.0
  Co  Co16  1  0.109  0.610  0.671  1.0
  Co  Co17  1  0.610  0.109  0.671  1.0
[/CIF]
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