The crystal structure described by Dy2Co7 crystallizes in the trigonal R-3m space group. There are six inequivalent Dy sites. In the first Dy site, Dy(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 Dy site, Dy(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 Dy site, Dy(2) is bonded in a 12-coordinate geometry to three equivalent Co(1) and nine equivalent Co(5) atoms. In the fourth Dy site, Dy(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 fifth Dy site, Dy(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 Dy site, Dy(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 seven inequivalent Co sites. In the first Co site, Co(4) is bonded to four Dy(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoDy4Co8 cuboctahedra that share corners with four equivalent Co(4)Dy4Co8 cuboctahedra; corners with twelve equivalent Co(5)Dy5Co7 cuboctahedra; edges with two equivalent Co(4)Dy4Co8 cuboctahedra; edges with eight equivalent Co(5)Dy5Co7 cuboctahedra; faces with two equivalent Co(5)Dy5Co7 cuboctahedra; and faces with eight Co(4,4)Dy4Co8 cuboctahedra. In the second Co site, Co(4) is bonded to four Dy(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoDy4Co8 cuboctahedra that share corners with four equivalent Co(4)Dy4Co8 cuboctahedra; corners with twelve equivalent Co(5)Dy5Co7 cuboctahedra; edges with two equivalent Co(4)Dy4Co8 cuboctahedra; edges with eight equivalent Co(5)Dy5Co7 cuboctahedra; faces with two equivalent Co(5)Dy5Co7 cuboctahedra; and faces with eight Co(4,4)Dy4Co8 cuboctahedra. In the third Co site, Co(1) is bonded to six equivalent Dy(2) and six equivalent Co(5) atoms to form CoDy6Co6 cuboctahedra that share corners with twelve equivalent Co(5)Dy5Co7 cuboctahedra, edges with six equivalent Co(1)Dy6Co6 cuboctahedra, and faces with eighteen equivalent Co(5)Dy5Co7 cuboctahedra. In the fourth Co site, Co(2) is bonded in a 9-coordinate geometry to three equivalent Dy(1), three equivalent Co(4), and three equivalent Co(5) atoms. In the fifth Co site, Co(3) is bonded in a 9-coordinate geometry to three equivalent Dy(1), three equivalent Co(4), and three equivalent Co(5) atoms. In the sixth Co site, Co(4) is bonded to four Dy(1,1); two equivalent Co(2); two equivalent Co(3); and four equivalent Co(4) atoms to form CoDy4Co8 cuboctahedra that share corners with four equivalent Co(4)Dy4Co8 cuboctahedra, corners with twelve equivalent Co(5)Dy5Co7 cuboctahedra, edges with two equivalent Co(4)Dy4Co8 cuboctahedra, edges with eight equivalent Co(5)Dy5Co7 cuboctahedra, faces with two equivalent Co(5)Dy5Co7 cuboctahedra, and faces with eight equivalent Co(4)Dy4Co8 cuboctahedra. In the seventh Co site, Co(5) is bonded to two equivalent Dy(1), three equivalent Dy(2), one Co(1), one Co(2), one Co(3), and four equivalent Co(5) atoms to form distorted CoDy5Co7 cuboctahedra that share corners with two equivalent Co(1)Dy6Co6 cuboctahedra, corners with six equivalent Co(4)Dy4Co8 cuboctahedra, corners with nine equivalent Co(5)Dy5Co7 cuboctahedra, edges with four equivalent Co(4)Dy4Co8 cuboctahedra, edges with four equivalent Co(5)Dy5Co7 cuboctahedra,  a faceface with one Co(4)Dy4Co8 cuboctahedra, faces with three equivalent Co(1)Dy6Co6 cuboctahedra, and faces with ten equivalent Co(5)Dy5Co7 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy2Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.948
_cell_length_b   4.948
_cell_length_c   12.397
_cell_angle_alpha   78.489
_cell_angle_beta   78.489
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   255.767
_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
  Dy  Dy0  1  0.948  0.948  0.155  1.0
  Dy  Dy1  1  0.052  0.052  0.845  1.0
  Dy  Dy2  1  0.852  0.852  0.445  1.0
  Dy  Dy3  1  0.148  0.148  0.555  1.0
  Co  Co4  1  0.500  0.500  0.500  1.0
  Co  Co5  1  0.721  0.721  0.836  1.0
  Co  Co6  1  0.279  0.279  0.164  1.0
  Co  Co7  1  0.612  0.612  0.165  1.0
  Co  Co8  1  0.388  0.388  0.835  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  0.391  0.391  0.327  1.0
  Co  Co13  1  0.891  0.391  0.327  1.0
  Co  Co14  1  0.391  0.891  0.327  1.0
  Co  Co15  1  0.609  0.609  0.673  1.0
  Co  Co16  1  0.109  0.609  0.673  1.0
  Co  Co17  1  0.609  0.109  0.673  1.0
[/CIF]
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The crystal structure described by Dy2Co7 crystallizes in the trigonal R-3m space group. There are six inequivalent Dy sites. In the first Dy site, Dy(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 Dy site, Dy(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 Dy site, Dy(2) is bonded in a 12-coordinate geometry to three equivalent Co(1) and nine equivalent Co(5) atoms. In the fourth Dy site, Dy(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 fifth Dy site, Dy(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 Dy site, Dy(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 seven inequivalent Co sites. In the first Co site, Co(4) is bonded to four Dy(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoDy4Co8 cuboctahedra that share corners with four equivalent Co(4)Dy4Co8 cuboctahedra; corners with twelve equivalent Co(5)Dy5Co7 cuboctahedra; edges with two equivalent Co(4)Dy4Co8 cuboctahedra; edges with eight equivalent Co(5)Dy5Co7 cuboctahedra; faces with two equivalent Co(5)Dy5Co7 cuboctahedra; and faces with eight Co(4,4)Dy4Co8 cuboctahedra. In the second Co site, Co(4) is bonded to four Dy(1,1); two equivalent Co(2); two equivalent Co(3); and four Co(4,4) atoms to form CoDy4Co8 cuboctahedra that share corners with four equivalent Co(4)Dy4Co8 cuboctahedra; corners with twelve equivalent Co(5)Dy5Co7 cuboctahedra; edges with two equivalent Co(4)Dy4Co8 cuboctahedra; edges with eight equivalent Co(5)Dy5Co7 cuboctahedra; faces with two equivalent Co(5)Dy5Co7 cuboctahedra; and faces with eight Co(4,4)Dy4Co8 cuboctahedra. In the third Co site, Co(1) is bonded to six equivalent Dy(2) and six equivalent Co(5) atoms to form CoDy6Co6 cuboctahedra that share corners with twelve equivalent Co(5)Dy5Co7 cuboctahedra, edges with six equivalent Co(1)Dy6Co6 cuboctahedra, and faces with eighteen equivalent Co(5)Dy5Co7 cuboctahedra. In the fourth Co site, Co(2) is bonded in a 9-coordinate geometry to three equivalent Dy(1), three equivalent Co(4), and three equivalent Co(5) atoms. In the fifth Co site, Co(3) is bonded in a 9-coordinate geometry to three equivalent Dy(1), three equivalent Co(4), and three equivalent Co(5) atoms. In the sixth Co site, Co(4) is bonded to four Dy(1,1); two equivalent Co(2); two equivalent Co(3); and four equivalent Co(4) atoms to form CoDy4Co8 cuboctahedra that share corners with four equivalent Co(4)Dy4Co8 cuboctahedra, corners with twelve equivalent Co(5)Dy5Co7 cuboctahedra, edges with two equivalent Co(4)Dy4Co8 cuboctahedra, edges with eight equivalent Co(5)Dy5Co7 cuboctahedra, faces with two equivalent Co(5)Dy5Co7 cuboctahedra, and faces with eight equivalent Co(4)Dy4Co8 cuboctahedra. In the seventh Co site, Co(5) is bonded to two equivalent Dy(1), three equivalent Dy(2), one Co(1), one Co(2), one Co(3), and four equivalent Co(5) atoms to form distorted CoDy5Co7 cuboctahedra that share corners with two equivalent Co(1)Dy6Co6 cuboctahedra, corners with six equivalent Co(4)Dy4Co8 cuboctahedra, corners with nine equivalent Co(5)Dy5Co7 cuboctahedra, edges with four equivalent Co(4)Dy4Co8 cuboctahedra, edges with four equivalent Co(5)Dy5Co7 cuboctahedra,  a faceface with one Co(4)Dy4Co8 cuboctahedra, faces with three equivalent Co(1)Dy6Co6 cuboctahedra, and faces with ten equivalent Co(5)Dy5Co7 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy2Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.948
_cell_length_b   4.948
_cell_length_c   12.397
_cell_angle_alpha   78.489
_cell_angle_beta   78.489
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   255.767
_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
  Dy  Dy0  1  0.948  0.948  0.155  1.0
  Dy  Dy1  1  0.052  0.052  0.845  1.0
  Dy  Dy2  1  0.852  0.852  0.445  1.0
  Dy  Dy3  1  0.148  0.148  0.555  1.0
  Co  Co4  1  0.500  0.500  0.500  1.0
  Co  Co5  1  0.721  0.721  0.836  1.0
  Co  Co6  1  0.279  0.279  0.164  1.0
  Co  Co7  1  0.612  0.612  0.165  1.0
  Co  Co8  1  0.388  0.388  0.835  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  0.391  0.391  0.327  1.0
  Co  Co13  1  0.891  0.391  0.327  1.0
  Co  Co14  1  0.391  0.891  0.327  1.0
  Co  Co15  1  0.609  0.609  0.673  1.0
  Co  Co16  1  0.109  0.609  0.673  1.0
  Co  Co17  1  0.609  0.109  0.673  1.0
[/CIF]
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