The structure described by Ho2Co7 crystallizes in the trigonal R-3m space group. There are six inequivalent Ho sites. In the first Ho site, Ho(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 second Ho site, Ho(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 third Ho site, Ho(2) is bonded in a 12-coordinate geometry to three equivalent Co(1) and nine equivalent Co(5) atoms. In the fourth Ho site, Ho(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 Ho site, Ho(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 Ho site, Ho(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. There are nine inequivalent Co sites. In the first Co site, Co(4) is bonded to four Ho(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoHo4Co8 cuboctahedra that share corners with four equivalent Co(4)Ho4Co8 cuboctahedra; corners with twelve equivalent Co(5)Ho5Co7 cuboctahedra; edges with two equivalent Co(4)Ho4Co8 cuboctahedra; edges with eight equivalent Co(5)Ho5Co7 cuboctahedra; faces with two equivalent Co(5)Ho5Co7 cuboctahedra; and faces with eight Co(4,4)Ho4Co8 cuboctahedra. In the second Co site, Co(4) is bonded to four Ho(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoHo4Co8 cuboctahedra that share corners with four equivalent Co(4)Ho4Co8 cuboctahedra; corners with twelve equivalent Co(5)Ho5Co7 cuboctahedra; edges with two equivalent Co(4)Ho4Co8 cuboctahedra; edges with eight equivalent Co(5)Ho5Co7 cuboctahedra; faces with two equivalent Co(5)Ho5Co7 cuboctahedra; and faces with eight Co(4,4)Ho4Co8 cuboctahedra. In the third Co site, Co(1) is bonded to six equivalent Ho(2) and six equivalent Co(5) atoms to form CoHo6Co6 cuboctahedra that share corners with twelve equivalent Co(5)Ho5Co7 cuboctahedra, edges with six equivalent Co(1)Ho6Co6 cuboctahedra, and faces with eighteen equivalent Co(5)Ho5Co7 cuboctahedra. In the fourth Co site, Co(2) is bonded in a 9-coordinate geometry to three equivalent Ho(1), three equivalent Co(4), and three equivalent Co(5) atoms. In the fifth Co site, Co(4) is bonded to four Ho(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoHo4Co8 cuboctahedra that share corners with four equivalent Co(4)Ho4Co8 cuboctahedra; corners with twelve equivalent Co(5)Ho5Co7 cuboctahedra; edges with two equivalent Co(4)Ho4Co8 cuboctahedra; edges with eight equivalent Co(5)Ho5Co7 cuboctahedra; faces with two equivalent Co(5)Ho5Co7 cuboctahedra; and faces with eight Co(4,4)Ho4Co8 cuboctahedra. In the sixth Co site, Co(3) is bonded in a 9-coordinate geometry to three equivalent Ho(1); three Co(4,4,4); and three equivalent Co(5) atoms. In the seventh Co site, Co(4) is bonded to four Ho(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoHo4Co8 cuboctahedra that share corners with four equivalent Co(4)Ho4Co8 cuboctahedra; corners with twelve equivalent Co(5)Ho5Co7 cuboctahedra; edges with two equivalent Co(4)Ho4Co8 cuboctahedra; edges with eight equivalent Co(5)Ho5Co7 cuboctahedra; faces with two equivalent Co(5)Ho5Co7 cuboctahedra; and faces with eight Co(4,4)Ho4Co8 cuboctahedra. In the eighth Co site, Co(4) is bonded to four equivalent Ho(1), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(4) atoms to form CoHo4Co8 cuboctahedra that share corners with four equivalent Co(4)Ho4Co8 cuboctahedra, corners with twelve equivalent Co(5)Ho5Co7 cuboctahedra, edges with two equivalent Co(4)Ho4Co8 cuboctahedra, edges with eight equivalent Co(5)Ho5Co7 cuboctahedra, faces with two equivalent Co(5)Ho5Co7 cuboctahedra, and faces with eight equivalent Co(4)Ho4Co8 cuboctahedra. In the ninth Co site, Co(5) is bonded to two equivalent Ho(1), three equivalent Ho(2), one Co(1), one Co(2), one Co(3), and four equivalent Co(5) atoms to form distorted CoHo5Co7 cuboctahedra that share corners with two equivalent Co(1)Ho6Co6 cuboctahedra; corners with six Co(4,4,4)Ho4Co8 cuboctahedra; corners with nine equivalent Co(5)Ho5Co7 cuboctahedra; edges with four Co(4,4)Ho4Co8 cuboctahedra; edges with four equivalent Co(5)Ho5Co7 cuboctahedra;  a faceface with one Co(4)Ho4Co8 cuboctahedra; faces with three equivalent Co(1)Ho6Co6 cuboctahedra; and faces with ten equivalent Co(5)Ho5Co7 cuboctahedra. is represented by the CIF card [CIF]
data_Ho2Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.924
_cell_length_b   4.924
_cell_length_c   12.314
_cell_angle_alpha   78.466
_cell_angle_beta   78.466
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   251.602
_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
  Ho  Ho0  1  0.947  0.947  0.158  1.0
  Ho  Ho1  1  0.053  0.053  0.842  1.0
  Ho  Ho2  1  0.851  0.851  0.446  1.0
  Ho  Ho3  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  0.166  1.0
  Co  Co8  1  0.389  0.389  0.834  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  0.328  1.0
  Co  Co13  1  0.891  0.390  0.328  1.0
  Co  Co14  1  0.390  0.891  0.328  1.0
  Co  Co15  1  0.610  0.610  0.672  1.0
  Co  Co16  1  0.109  0.610  0.672  1.0
  Co  Co17  1  0.610  0.109  0.672  1.0
[/CIF]
.
The structure described by Ho2Co7 crystallizes in the trigonal R-3m space group. There are six inequivalent Ho sites. In the first Ho site, Ho(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 second Ho site, Ho(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 third Ho site, Ho(2) is bonded in a 12-coordinate geometry to three equivalent Co(1) and nine equivalent Co(5) atoms. In the fourth Ho site, Ho(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 Ho site, Ho(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 Ho site, Ho(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. There are nine inequivalent Co sites. In the first Co site, Co(4) is bonded to four Ho(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoHo4Co8 cuboctahedra that share corners with four equivalent Co(4)Ho4Co8 cuboctahedra; corners with twelve equivalent Co(5)Ho5Co7 cuboctahedra; edges with two equivalent Co(4)Ho4Co8 cuboctahedra; edges with eight equivalent Co(5)Ho5Co7 cuboctahedra; faces with two equivalent Co(5)Ho5Co7 cuboctahedra; and faces with eight Co(4,4)Ho4Co8 cuboctahedra. In the second Co site, Co(4) is bonded to four Ho(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoHo4Co8 cuboctahedra that share corners with four equivalent Co(4)Ho4Co8 cuboctahedra; corners with twelve equivalent Co(5)Ho5Co7 cuboctahedra; edges with two equivalent Co(4)Ho4Co8 cuboctahedra; edges with eight equivalent Co(5)Ho5Co7 cuboctahedra; faces with two equivalent Co(5)Ho5Co7 cuboctahedra; and faces with eight Co(4,4)Ho4Co8 cuboctahedra. In the third Co site, Co(1) is bonded to six equivalent Ho(2) and six equivalent Co(5) atoms to form CoHo6Co6 cuboctahedra that share corners with twelve equivalent Co(5)Ho5Co7 cuboctahedra, edges with six equivalent Co(1)Ho6Co6 cuboctahedra, and faces with eighteen equivalent Co(5)Ho5Co7 cuboctahedra. In the fourth Co site, Co(2) is bonded in a 9-coordinate geometry to three equivalent Ho(1), three equivalent Co(4), and three equivalent Co(5) atoms. In the fifth Co site, Co(4) is bonded to four Ho(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoHo4Co8 cuboctahedra that share corners with four equivalent Co(4)Ho4Co8 cuboctahedra; corners with twelve equivalent Co(5)Ho5Co7 cuboctahedra; edges with two equivalent Co(4)Ho4Co8 cuboctahedra; edges with eight equivalent Co(5)Ho5Co7 cuboctahedra; faces with two equivalent Co(5)Ho5Co7 cuboctahedra; and faces with eight Co(4,4)Ho4Co8 cuboctahedra. In the sixth Co site, Co(3) is bonded in a 9-coordinate geometry to three equivalent Ho(1); three Co(4,4,4); and three equivalent Co(5) atoms. In the seventh Co site, Co(4) is bonded to four Ho(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoHo4Co8 cuboctahedra that share corners with four equivalent Co(4)Ho4Co8 cuboctahedra; corners with twelve equivalent Co(5)Ho5Co7 cuboctahedra; edges with two equivalent Co(4)Ho4Co8 cuboctahedra; edges with eight equivalent Co(5)Ho5Co7 cuboctahedra; faces with two equivalent Co(5)Ho5Co7 cuboctahedra; and faces with eight Co(4,4)Ho4Co8 cuboctahedra. In the eighth Co site, Co(4) is bonded to four equivalent Ho(1), two equivalent Co(2), two equivalent Co(3), and four equivalent Co(4) atoms to form CoHo4Co8 cuboctahedra that share corners with four equivalent Co(4)Ho4Co8 cuboctahedra, corners with twelve equivalent Co(5)Ho5Co7 cuboctahedra, edges with two equivalent Co(4)Ho4Co8 cuboctahedra, edges with eight equivalent Co(5)Ho5Co7 cuboctahedra, faces with two equivalent Co(5)Ho5Co7 cuboctahedra, and faces with eight equivalent Co(4)Ho4Co8 cuboctahedra. In the ninth Co site, Co(5) is bonded to two equivalent Ho(1), three equivalent Ho(2), one Co(1), one Co(2), one Co(3), and four equivalent Co(5) atoms to form distorted CoHo5Co7 cuboctahedra that share corners with two equivalent Co(1)Ho6Co6 cuboctahedra; corners with six Co(4,4,4)Ho4Co8 cuboctahedra; corners with nine equivalent Co(5)Ho5Co7 cuboctahedra; edges with four Co(4,4)Ho4Co8 cuboctahedra; edges with four equivalent Co(5)Ho5Co7 cuboctahedra;  a faceface with one Co(4)Ho4Co8 cuboctahedra; faces with three equivalent Co(1)Ho6Co6 cuboctahedra; and faces with ten equivalent Co(5)Ho5Co7 cuboctahedra. is represented by the CIF card [CIF]
data_Ho2Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.924
_cell_length_b   4.924
_cell_length_c   12.314
_cell_angle_alpha   78.466
_cell_angle_beta   78.466
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   251.602
_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
  Ho  Ho0  1  0.947  0.947  0.158  1.0
  Ho  Ho1  1  0.053  0.053  0.842  1.0
  Ho  Ho2  1  0.851  0.851  0.446  1.0
  Ho  Ho3  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  0.166  1.0
  Co  Co8  1  0.389  0.389  0.834  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  0.328  1.0
  Co  Co13  1  0.891  0.390  0.328  1.0
  Co  Co14  1  0.390  0.891  0.328  1.0
  Co  Co15  1  0.610  0.610  0.672  1.0
  Co  Co16  1  0.109  0.610  0.672  1.0
  Co  Co17  1  0.610  0.109  0.672  1.0
[/CIF]
.