The material structure described by Co3(AsO4)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), one O(7), and one O(8) atom to form CoO5 trigonal bipyramids that share corners with two equivalent Co(2)O6 octahedra, corners with two equivalent As(2)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra, and edges with two equivalent Co(3)O6 octahedra. The corner-sharing octahedral tilt angles are 64°. In the second Co site, Co(2) is bonded to one O(2), one O(4), one O(5), one O(6), and two equivalent O(3) atoms to form distorted CoO6 octahedra that share  a cornercorner with one As(1)O4 tetrahedra, corners with three equivalent As(2)O4 tetrahedra, corners with two equivalent Co(1)O5 trigonal bipyramids,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra, and  an edgeedge with one As(1)O4 tetrahedra. In the third Co site, Co(3) is bonded to one O(1), one O(5), one O(6), one O(7), and two equivalent O(8) atoms to form distorted CoO6 octahedra that share corners with three equivalent As(1)O4 tetrahedra, corners with three equivalent As(2)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra, and edges with two equivalent Co(1)O5 trigonal bipyramids. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form AsO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra, corners with three equivalent Co(3)O6 octahedra, corners with three equivalent Co(1)O5 trigonal bipyramids, and  an edgeedge with one Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-58°. In the second As site, As(2) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form AsO4 tetrahedra that share corners with three equivalent Co(2)O6 octahedra, corners with three equivalent Co(3)O6 octahedra, and corners with two equivalent Co(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 37-57°. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one As(1) atom. In the second O site, O(5) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one As(2) atom. In the third O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one As(1) atom. In the fourth O site, O(7) is bonded in a trigonal planar geometry to one Co(1), one Co(3), and one As(2) atom. In the fifth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Co(1), two equivalent Co(3), and one As(1) atom. In the sixth O site, O(1) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(3), and one As(2) atom. In the seventh O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one Co(2), and one As(1) atom. In the eighth O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Co(2) and one As(2) atom. is represented by the CIF card [CIF]
data_Co3(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.664
_cell_length_b   6.538
_cell_length_c   11.313
_cell_angle_alpha   88.980
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   640.735
_cell_formula_units_Z   4
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
  Co  Co0  1  0.834  0.760  0.641  1.0
  Co  Co1  1  0.334  0.240  0.859  1.0
  Co  Co2  1  0.166  0.240  0.359  1.0
  Co  Co3  1  0.666  0.760  0.141  1.0
  Co  Co4  1  0.945  0.390  0.874  1.0
  Co  Co5  1  0.445  0.610  0.626  1.0
  Co  Co6  1  0.055  0.610  0.126  1.0
  Co  Co7  1  0.555  0.390  0.374  1.0
  Co  Co8  1  0.670  0.109  0.945  1.0
  Co  Co9  1  0.170  0.891  0.555  1.0
  Co  Co10  1  0.330  0.891  0.055  1.0
  Co  Co11  1  0.830  0.109  0.445  1.0
  As  As12  1  0.912  0.607  0.366  1.0
  As  As13  1  0.412  0.393  0.134  1.0
  As  As14  1  0.088  0.393  0.634  1.0
  As  As15  1  0.588  0.607  0.866  1.0
  As  As16  1  0.954  0.101  0.144  1.0
  As  As17  1  0.454  0.899  0.356  1.0
  As  As18  1  0.046  0.899  0.856  1.0
  As  As19  1  0.546  0.101  0.644  1.0
  O  O20  1  0.540  0.133  0.796  1.0
  O  O21  1  0.040  0.867  0.704  1.0
  O  O22  1  0.460  0.867  0.204  1.0
  O  O23  1  0.960  0.133  0.296  1.0
  O  O24  1  0.407  0.525  0.825  1.0
  O  O25  1  0.907  0.475  0.675  1.0
  O  O26  1  0.593  0.475  0.175  1.0
  O  O27  1  0.093  0.525  0.325  1.0
  O  O28  1  0.498  0.327  0.572  1.0
  O  O29  1  0.998  0.673  0.928  1.0
  O  O30  1  0.502  0.673  0.428  1.0
  O  O31  1  0.002  0.327  0.072  1.0
  O  O32  1  0.643  0.704  0.730  1.0
  O  O33  1  0.143  0.296  0.770  1.0
  O  O34  1  0.357  0.296  0.270  1.0
  O  O35  1  0.857  0.704  0.230  1.0
  O  O36  1  0.404  0.921  0.617  1.0
  O  O37  1  0.904  0.079  0.883  1.0
  O  O38  1  0.596  0.079  0.383  1.0
  O  O39  1  0.096  0.921  0.117  1.0
  O  O40  1  0.786  0.425  0.422  1.0
  O  O41  1  0.286  0.575  0.078  1.0
  O  O42  1  0.214  0.575  0.578  1.0
  O  O43  1  0.714  0.425  0.922  1.0
  O  O44  1  0.767  0.036  0.104  1.0
  O  O45  1  0.267  0.964  0.396  1.0
  O  O46  1  0.233  0.964  0.896  1.0
  O  O47  1  0.733  0.036  0.604  1.0
  O  O48  1  0.929  0.801  0.471  1.0
  O  O49  1  0.429  0.199  0.029  1.0
  O  O50  1  0.071  0.199  0.529  1.0
  O  O51  1  0.571  0.801  0.971  1.0
[/CIF]
.
The material structure described by Co3(AsO4)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), one O(7), and one O(8) atom to form CoO5 trigonal bipyramids that share corners with two equivalent Co(2)O6 octahedra, corners with two equivalent As(2)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra, and edges with two equivalent Co(3)O6 octahedra. The corner-sharing octahedral tilt angles are 64°. In the second Co site, Co(2) is bonded to one O(2), one O(4), one O(5), one O(6), and two equivalent O(3) atoms to form distorted CoO6 octahedra that share  a cornercorner with one As(1)O4 tetrahedra, corners with three equivalent As(2)O4 tetrahedra, corners with two equivalent Co(1)O5 trigonal bipyramids,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra, and  an edgeedge with one As(1)O4 tetrahedra. In the third Co site, Co(3) is bonded to one O(1), one O(5), one O(6), one O(7), and two equivalent O(8) atoms to form distorted CoO6 octahedra that share corners with three equivalent As(1)O4 tetrahedra, corners with three equivalent As(2)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra,  an edgeedge with one Co(3)O6 octahedra, and edges with two equivalent Co(1)O5 trigonal bipyramids. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form AsO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra, corners with three equivalent Co(3)O6 octahedra, corners with three equivalent Co(1)O5 trigonal bipyramids, and  an edgeedge with one Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-58°. In the second As site, As(2) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form AsO4 tetrahedra that share corners with three equivalent Co(2)O6 octahedra, corners with three equivalent Co(3)O6 octahedra, and corners with two equivalent Co(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 37-57°. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one As(1) atom. In the second O site, O(5) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one As(2) atom. In the third O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one As(1) atom. In the fourth O site, O(7) is bonded in a trigonal planar geometry to one Co(1), one Co(3), and one As(2) atom. In the fifth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Co(1), two equivalent Co(3), and one As(1) atom. In the sixth O site, O(1) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(3), and one As(2) atom. In the seventh O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one Co(2), and one As(1) atom. In the eighth O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Co(2) and one As(2) atom. is represented by the CIF card [CIF]
data_Co3(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.664
_cell_length_b   6.538
_cell_length_c   11.313
_cell_angle_alpha   88.980
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   640.735
_cell_formula_units_Z   4
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
  Co  Co0  1  0.834  0.760  0.641  1.0
  Co  Co1  1  0.334  0.240  0.859  1.0
  Co  Co2  1  0.166  0.240  0.359  1.0
  Co  Co3  1  0.666  0.760  0.141  1.0
  Co  Co4  1  0.945  0.390  0.874  1.0
  Co  Co5  1  0.445  0.610  0.626  1.0
  Co  Co6  1  0.055  0.610  0.126  1.0
  Co  Co7  1  0.555  0.390  0.374  1.0
  Co  Co8  1  0.670  0.109  0.945  1.0
  Co  Co9  1  0.170  0.891  0.555  1.0
  Co  Co10  1  0.330  0.891  0.055  1.0
  Co  Co11  1  0.830  0.109  0.445  1.0
  As  As12  1  0.912  0.607  0.366  1.0
  As  As13  1  0.412  0.393  0.134  1.0
  As  As14  1  0.088  0.393  0.634  1.0
  As  As15  1  0.588  0.607  0.866  1.0
  As  As16  1  0.954  0.101  0.144  1.0
  As  As17  1  0.454  0.899  0.356  1.0
  As  As18  1  0.046  0.899  0.856  1.0
  As  As19  1  0.546  0.101  0.644  1.0
  O  O20  1  0.540  0.133  0.796  1.0
  O  O21  1  0.040  0.867  0.704  1.0
  O  O22  1  0.460  0.867  0.204  1.0
  O  O23  1  0.960  0.133  0.296  1.0
  O  O24  1  0.407  0.525  0.825  1.0
  O  O25  1  0.907  0.475  0.675  1.0
  O  O26  1  0.593  0.475  0.175  1.0
  O  O27  1  0.093  0.525  0.325  1.0
  O  O28  1  0.498  0.327  0.572  1.0
  O  O29  1  0.998  0.673  0.928  1.0
  O  O30  1  0.502  0.673  0.428  1.0
  O  O31  1  0.002  0.327  0.072  1.0
  O  O32  1  0.643  0.704  0.730  1.0
  O  O33  1  0.143  0.296  0.770  1.0
  O  O34  1  0.357  0.296  0.270  1.0
  O  O35  1  0.857  0.704  0.230  1.0
  O  O36  1  0.404  0.921  0.617  1.0
  O  O37  1  0.904  0.079  0.883  1.0
  O  O38  1  0.596  0.079  0.383  1.0
  O  O39  1  0.096  0.921  0.117  1.0
  O  O40  1  0.786  0.425  0.422  1.0
  O  O41  1  0.286  0.575  0.078  1.0
  O  O42  1  0.214  0.575  0.578  1.0
  O  O43  1  0.714  0.425  0.922  1.0
  O  O44  1  0.767  0.036  0.104  1.0
  O  O45  1  0.267  0.964  0.396  1.0
  O  O46  1  0.233  0.964  0.896  1.0
  O  O47  1  0.733  0.036  0.604  1.0
  O  O48  1  0.929  0.801  0.471  1.0
  O  O49  1  0.429  0.199  0.029  1.0
  O  O50  1  0.071  0.199  0.529  1.0
  O  O51  1  0.571  0.801  0.971  1.0
[/CIF]
.