The material structure described by Y2Co12As7 crystallizes in the hexagonal P-6 space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 18-coordinate geometry to three equivalent Co(1), three equivalent Co(3), six equivalent Co(4), and six equivalent As(2) atoms. In the second Y site, Y(2) is bonded in a 15-coordinate geometry to three equivalent Co(4), six equivalent Co(1), and six equivalent As(3) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one Y(1), two equivalent Y(2), two equivalent As(2), and two equivalent As(3) atoms to form distorted CoY3As4 tetrahedra that share corners with four equivalent Co(4)Y3As4 tetrahedra, corners with four equivalent Co(3)YAs4 tetrahedra, corners with six equivalent Co(1)Y3As4 tetrahedra,  an edgeedge with one Co(3)YAs4 tetrahedra, edges with two equivalent Co(1)Y3As4 tetrahedra, edges with four equivalent Co(4)Y3As4 tetrahedra,  a faceface with one Co(3)YAs4 tetrahedra, faces with two equivalent Co(1)Y3As4 tetrahedra, and faces with two equivalent Co(4)Y3As4 tetrahedra. In the second Co site, Co(2) is bonded in a 5-coordinate geometry to one As(2), two equivalent As(1), and two equivalent As(3) atoms. In the third Co site, Co(3) is bonded to one Y(1), one As(1), one As(3), and two equivalent As(2) atoms to form distorted CoYAs4 tetrahedra that share corners with two equivalent Co(4)Y3As4 tetrahedra, corners with four equivalent Co(1)Y3As4 tetrahedra, corners with six equivalent Co(3)YAs4 tetrahedra,  an edgeedge with one Co(1)Y3As4 tetrahedra, edges with two equivalent Co(4)Y3As4 tetrahedra,  a faceface with one Co(1)Y3As4 tetrahedra, and faces with two equivalent Co(4)Y3As4 tetrahedra. In the fourth Co site, Co(4) is bonded to one Y(2), two equivalent Y(1), two equivalent As(2), and two equivalent As(3) atoms to form distorted CoY3As4 tetrahedra that share corners with two equivalent Co(3)YAs4 tetrahedra, corners with four equivalent Co(1)Y3As4 tetrahedra, corners with six equivalent Co(4)Y3As4 tetrahedra, edges with two equivalent Co(4)Y3As4 tetrahedra, edges with two equivalent Co(3)YAs4 tetrahedra, edges with four equivalent Co(1)Y3As4 tetrahedra, faces with two equivalent Co(1)Y3As4 tetrahedra, faces with two equivalent Co(4)Y3As4 tetrahedra, and faces with two equivalent Co(3)YAs4 tetrahedra. There are three inequivalent As sites. In the first As site, As(1) is bonded in a 9-coordinate geometry to three equivalent Co(3) and six equivalent Co(2) atoms. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent Y(1), one Co(2), two equivalent Co(1), two equivalent Co(3), and two equivalent Co(4) atoms. In the third As site, As(3) is bonded in a 9-coordinate geometry to two equivalent Y(2), one Co(3), two equivalent Co(1), two equivalent Co(2), and two equivalent Co(4) atoms. is represented by the CIF card [CIF]
data_Y2Co12As7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.738
_cell_length_b   9.361
_cell_length_c   9.361
_cell_angle_alpha   120.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   283.692
_cell_formula_units_Z   1
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
  Y  Y0  1  0.000  0.667  0.333  1.0
  Y  Y1  1  0.500  0.333  0.667  1.0
  Co  Co2  1  0.000  0.570  0.943  1.0
  Co  Co3  1  0.000  0.373  0.430  1.0
  Co  Co4  1  0.000  0.057  0.627  1.0
  Co  Co5  1  0.500  0.776  0.901  1.0
  Co  Co6  1  0.500  0.126  0.224  1.0
  Co  Co7  1  0.500  0.099  0.874  1.0
  Co  Co8  1  0.000  0.881  0.158  1.0
  Co  Co9  1  0.000  0.277  0.119  1.0
  Co  Co10  1  0.000  0.842  0.723  1.0
  Co  Co11  1  0.500  0.951  0.384  1.0
  Co  Co12  1  0.500  0.433  0.049  1.0
  Co  Co13  1  0.500  0.616  0.567  1.0
  As  As14  1  0.000  0.000  0.000  1.0
  As  As15  1  0.500  0.711  0.114  1.0
  As  As16  1  0.500  0.404  0.289  1.0
  As  As17  1  0.500  0.886  0.596  1.0
  As  As18  1  0.000  0.590  0.706  1.0
  As  As19  1  0.000  0.115  0.410  1.0
  As  As20  1  0.000  0.294  0.885  1.0
[/CIF]
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The material structure described by Y2Co12As7 crystallizes in the hexagonal P-6 space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 18-coordinate geometry to three equivalent Co(1), three equivalent Co(3), six equivalent Co(4), and six equivalent As(2) atoms. In the second Y site, Y(2) is bonded in a 15-coordinate geometry to three equivalent Co(4), six equivalent Co(1), and six equivalent As(3) atoms. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one Y(1), two equivalent Y(2), two equivalent As(2), and two equivalent As(3) atoms to form distorted CoY3As4 tetrahedra that share corners with four equivalent Co(4)Y3As4 tetrahedra, corners with four equivalent Co(3)YAs4 tetrahedra, corners with six equivalent Co(1)Y3As4 tetrahedra,  an edgeedge with one Co(3)YAs4 tetrahedra, edges with two equivalent Co(1)Y3As4 tetrahedra, edges with four equivalent Co(4)Y3As4 tetrahedra,  a faceface with one Co(3)YAs4 tetrahedra, faces with two equivalent Co(1)Y3As4 tetrahedra, and faces with two equivalent Co(4)Y3As4 tetrahedra. In the second Co site, Co(2) is bonded in a 5-coordinate geometry to one As(2), two equivalent As(1), and two equivalent As(3) atoms. In the third Co site, Co(3) is bonded to one Y(1), one As(1), one As(3), and two equivalent As(2) atoms to form distorted CoYAs4 tetrahedra that share corners with two equivalent Co(4)Y3As4 tetrahedra, corners with four equivalent Co(1)Y3As4 tetrahedra, corners with six equivalent Co(3)YAs4 tetrahedra,  an edgeedge with one Co(1)Y3As4 tetrahedra, edges with two equivalent Co(4)Y3As4 tetrahedra,  a faceface with one Co(1)Y3As4 tetrahedra, and faces with two equivalent Co(4)Y3As4 tetrahedra. In the fourth Co site, Co(4) is bonded to one Y(2), two equivalent Y(1), two equivalent As(2), and two equivalent As(3) atoms to form distorted CoY3As4 tetrahedra that share corners with two equivalent Co(3)YAs4 tetrahedra, corners with four equivalent Co(1)Y3As4 tetrahedra, corners with six equivalent Co(4)Y3As4 tetrahedra, edges with two equivalent Co(4)Y3As4 tetrahedra, edges with two equivalent Co(3)YAs4 tetrahedra, edges with four equivalent Co(1)Y3As4 tetrahedra, faces with two equivalent Co(1)Y3As4 tetrahedra, faces with two equivalent Co(4)Y3As4 tetrahedra, and faces with two equivalent Co(3)YAs4 tetrahedra. There are three inequivalent As sites. In the first As site, As(1) is bonded in a 9-coordinate geometry to three equivalent Co(3) and six equivalent Co(2) atoms. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent Y(1), one Co(2), two equivalent Co(1), two equivalent Co(3), and two equivalent Co(4) atoms. In the third As site, As(3) is bonded in a 9-coordinate geometry to two equivalent Y(2), one Co(3), two equivalent Co(1), two equivalent Co(2), and two equivalent Co(4) atoms. is represented by the CIF card [CIF]
data_Y2Co12As7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.738
_cell_length_b   9.361
_cell_length_c   9.361
_cell_angle_alpha   120.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   283.692
_cell_formula_units_Z   1
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
  Y  Y0  1  0.000  0.667  0.333  1.0
  Y  Y1  1  0.500  0.333  0.667  1.0
  Co  Co2  1  0.000  0.570  0.943  1.0
  Co  Co3  1  0.000  0.373  0.430  1.0
  Co  Co4  1  0.000  0.057  0.627  1.0
  Co  Co5  1  0.500  0.776  0.901  1.0
  Co  Co6  1  0.500  0.126  0.224  1.0
  Co  Co7  1  0.500  0.099  0.874  1.0
  Co  Co8  1  0.000  0.881  0.158  1.0
  Co  Co9  1  0.000  0.277  0.119  1.0
  Co  Co10  1  0.000  0.842  0.723  1.0
  Co  Co11  1  0.500  0.951  0.384  1.0
  Co  Co12  1  0.500  0.433  0.049  1.0
  Co  Co13  1  0.500  0.616  0.567  1.0
  As  As14  1  0.000  0.000  0.000  1.0
  As  As15  1  0.500  0.711  0.114  1.0
  As  As16  1  0.500  0.404  0.289  1.0
  As  As17  1  0.500  0.886  0.596  1.0
  As  As18  1  0.000  0.590  0.706  1.0
  As  As19  1  0.000  0.115  0.410  1.0
  As  As20  1  0.000  0.294  0.885  1.0
[/CIF]
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