The compound described by Cr8Co7 is beta Uranium-derived structured and crystallizes in the tetragonal P4_2nm space group. There are five inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 14-coordinate geometry to one Cr(2); two equivalent Cr(3); five Cr(1,1); two equivalent Co(3); and four equivalent Co(1) atoms. In the second Cr site, Cr(1) is bonded in a 14-coordinate geometry to one Cr(2); two equivalent Cr(3); five Cr(1,1,1); two equivalent Co(3); and four equivalent Co(1) atoms. In the third Cr site, Cr(1) is bonded in a 14-coordinate geometry to one Cr(2); two equivalent Cr(3); five Cr(1,1); two equivalent Co(3); and four equivalent Co(1) atoms. In the fourth Cr site, Cr(2) is bonded in a 15-coordinate geometry to one Cr(2); two Cr(1,1); three equivalent Cr(3); two equivalent Co(2); three equivalent Co(3); and four equivalent Co(1) atoms. In the fifth Cr site, Cr(3) is bonded in a 7-coordinate geometry to three equivalent Cr(2); four Cr(1,1,1); one Co(2); two equivalent Co(3); and four equivalent Co(1) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent Cr(2); two equivalent Cr(3); four Cr(1,1); one Co(1); one Co(2); and two equivalent Co(3) atoms to form distorted CoCr8Co4 cuboctahedra that share corners with four equivalent Co(2)Cr6Co6 cuboctahedra, corners with seven equivalent Co(1)Cr8Co4 cuboctahedra, edges with three equivalent Co(1)Cr8Co4 cuboctahedra,  a faceface with one Co(2)Cr6Co6 cuboctahedra, and faces with six equivalent Co(1)Cr8Co4 cuboctahedra. In the second Co site, Co(2) is bonded to two equivalent Cr(3), four equivalent Cr(2), two equivalent Co(3), and four equivalent Co(1) atoms to form CoCr6Co6 cuboctahedra that share corners with sixteen equivalent Co(1)Cr8Co4 cuboctahedra, edges with two equivalent Co(2)Cr6Co6 cuboctahedra, and faces with four equivalent Co(1)Cr8Co4 cuboctahedra. In the third Co site, Co(3) is bonded in a 14-coordinate geometry to two equivalent Cr(3); three equivalent Cr(2); four Cr(1,1); one Co(2); and four equivalent Co(1) atoms. is represented by the CIF file [CIF]
data_Cr8Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.692
_cell_length_b   8.694
_cell_length_c   8.694
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   354.666
_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
  Cr  Cr0  1  0.501  0.360  0.961  1.0
  Cr  Cr1  1  0.501  0.640  0.039  1.0
  Cr  Cr2  1  0.001  0.140  0.461  1.0
  Cr  Cr3  1  0.001  0.860  0.539  1.0
  Cr  Cr4  1  0.501  0.961  0.360  1.0
  Cr  Cr5  1  0.501  0.039  0.640  1.0
  Cr  Cr6  1  0.001  0.461  0.140  1.0
  Cr  Cr7  1  0.001  0.539  0.860  1.0
  Cr  Cr8  1  0.494  0.103  0.897  1.0
  Cr  Cr9  1  0.494  0.897  0.103  1.0
  Cr  Cr10  1  0.994  0.397  0.397  1.0
  Cr  Cr11  1  0.994  0.603  0.603  1.0
  Cr  Cr12  1  0.750  0.690  0.310  1.0
  Cr  Cr13  1  0.750  0.310  0.690  1.0
  Cr  Cr14  1  0.250  0.810  0.810  1.0
  Cr  Cr15  1  0.250  0.190  0.190  1.0
  Co  Co16  1  0.504  0.242  0.438  1.0
  Co  Co17  1  0.504  0.758  0.562  1.0
  Co  Co18  1  0.004  0.258  0.938  1.0
  Co  Co19  1  0.004  0.742  0.062  1.0
  Co  Co20  1  0.504  0.438  0.242  1.0
  Co  Co21  1  0.504  0.562  0.758  1.0
  Co  Co22  1  0.004  0.938  0.258  1.0
  Co  Co23  1  0.004  0.062  0.742  1.0
  Co  Co24  1  0.496  0.500  0.500  1.0
  Co  Co25  1  0.996  0.000  0.000  1.0
  Co  Co26  1  0.248  0.316  0.684  1.0
  Co  Co27  1  0.248  0.684  0.316  1.0
  Co  Co28  1  0.748  0.184  0.184  1.0
  Co  Co29  1  0.748  0.816  0.816  1.0
[/CIF]
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The compound described by Cr8Co7 is beta Uranium-derived structured and crystallizes in the tetragonal P4_2nm space group. There are five inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 14-coordinate geometry to one Cr(2); two equivalent Cr(3); five Cr(1,1); two equivalent Co(3); and four equivalent Co(1) atoms. In the second Cr site, Cr(1) is bonded in a 14-coordinate geometry to one Cr(2); two equivalent Cr(3); five Cr(1,1,1); two equivalent Co(3); and four equivalent Co(1) atoms. In the third Cr site, Cr(1) is bonded in a 14-coordinate geometry to one Cr(2); two equivalent Cr(3); five Cr(1,1); two equivalent Co(3); and four equivalent Co(1) atoms. In the fourth Cr site, Cr(2) is bonded in a 15-coordinate geometry to one Cr(2); two Cr(1,1); three equivalent Cr(3); two equivalent Co(2); three equivalent Co(3); and four equivalent Co(1) atoms. In the fifth Cr site, Cr(3) is bonded in a 7-coordinate geometry to three equivalent Cr(2); four Cr(1,1,1); one Co(2); two equivalent Co(3); and four equivalent Co(1) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent Cr(2); two equivalent Cr(3); four Cr(1,1); one Co(1); one Co(2); and two equivalent Co(3) atoms to form distorted CoCr8Co4 cuboctahedra that share corners with four equivalent Co(2)Cr6Co6 cuboctahedra, corners with seven equivalent Co(1)Cr8Co4 cuboctahedra, edges with three equivalent Co(1)Cr8Co4 cuboctahedra,  a faceface with one Co(2)Cr6Co6 cuboctahedra, and faces with six equivalent Co(1)Cr8Co4 cuboctahedra. In the second Co site, Co(2) is bonded to two equivalent Cr(3), four equivalent Cr(2), two equivalent Co(3), and four equivalent Co(1) atoms to form CoCr6Co6 cuboctahedra that share corners with sixteen equivalent Co(1)Cr8Co4 cuboctahedra, edges with two equivalent Co(2)Cr6Co6 cuboctahedra, and faces with four equivalent Co(1)Cr8Co4 cuboctahedra. In the third Co site, Co(3) is bonded in a 14-coordinate geometry to two equivalent Cr(3); three equivalent Cr(2); four Cr(1,1); one Co(2); and four equivalent Co(1) atoms. is represented by the CIF file [CIF]
data_Cr8Co7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.692
_cell_length_b   8.694
_cell_length_c   8.694
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   354.666
_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
  Cr  Cr0  1  0.501  0.360  0.961  1.0
  Cr  Cr1  1  0.501  0.640  0.039  1.0
  Cr  Cr2  1  0.001  0.140  0.461  1.0
  Cr  Cr3  1  0.001  0.860  0.539  1.0
  Cr  Cr4  1  0.501  0.961  0.360  1.0
  Cr  Cr5  1  0.501  0.039  0.640  1.0
  Cr  Cr6  1  0.001  0.461  0.140  1.0
  Cr  Cr7  1  0.001  0.539  0.860  1.0
  Cr  Cr8  1  0.494  0.103  0.897  1.0
  Cr  Cr9  1  0.494  0.897  0.103  1.0
  Cr  Cr10  1  0.994  0.397  0.397  1.0
  Cr  Cr11  1  0.994  0.603  0.603  1.0
  Cr  Cr12  1  0.750  0.690  0.310  1.0
  Cr  Cr13  1  0.750  0.310  0.690  1.0
  Cr  Cr14  1  0.250  0.810  0.810  1.0
  Cr  Cr15  1  0.250  0.190  0.190  1.0
  Co  Co16  1  0.504  0.242  0.438  1.0
  Co  Co17  1  0.504  0.758  0.562  1.0
  Co  Co18  1  0.004  0.258  0.938  1.0
  Co  Co19  1  0.004  0.742  0.062  1.0
  Co  Co20  1  0.504  0.438  0.242  1.0
  Co  Co21  1  0.504  0.562  0.758  1.0
  Co  Co22  1  0.004  0.938  0.258  1.0
  Co  Co23  1  0.004  0.062  0.742  1.0
  Co  Co24  1  0.496  0.500  0.500  1.0
  Co  Co25  1  0.996  0.000  0.000  1.0
  Co  Co26  1  0.248  0.316  0.684  1.0
  Co  Co27  1  0.248  0.684  0.316  1.0
  Co  Co28  1  0.748  0.184  0.184  1.0
  Co  Co29  1  0.748  0.816  0.816  1.0
[/CIF]
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