The crystal 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(4), one O(5), one O(8), and two equivalent O(7) atoms to form CoO6 octahedra that share  a cornercorner with one Co(3)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, corners with three equivalent As(1)O4 tetrahedra, corners with three equivalent As(2)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-62°. In the second Co site, Co(2) is bonded to one O(3), one O(5), one O(6), one O(8), and two equivalent O(2) atoms to form CoO6 octahedra that share  a cornercorner with one Co(3)O6 octahedra, corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one As(2)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and  an edgeedge with one As(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-55°. In the third Co site, Co(3) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form CoO6 octahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one As(2)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra, and  an edgeedge with one As(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 55-62°. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form AsO4 tetrahedra that share corners with three equivalent Co(1)O6 octahedra, corners with three equivalent Co(2)O6 octahedra, and corners with three equivalent Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-60°. In the second As site, As(2) is bonded to one O(4), one O(5), one O(6), and one O(8) atom to form AsO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra, corners with three equivalent Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-59°. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one As(1) atom. In the second O site, O(8) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one As(2) atom. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(3), and one As(1) atom. In the fourth O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Co(3), two equivalent Co(2), and one As(1) atom. In the fifth O site, O(3) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one As(1) atom. In the sixth O site, O(4) 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(5) is bonded in a distorted trigonal pyramidal geometry to one Co(1), one Co(2), one Co(3), and one As(2) atom. In the eighth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), 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   9.660
_cell_length_b   5.828
_cell_length_c   10.275
_cell_angle_alpha   86.563
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   577.384
_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  0.134  0.889  0.464  1.0
  Co  Co1  1  0.878  0.644  0.057  1.0
  Co  Co2  1  0.622  0.644  0.557  1.0
  Co  Co3  1  0.639  0.351  0.284  1.0
  Co  Co4  1  0.634  0.111  0.036  1.0
  Co  Co5  1  0.366  0.889  0.964  1.0
  Co  Co6  1  0.861  0.351  0.784  1.0
  Co  Co7  1  0.866  0.111  0.536  1.0
  Co  Co8  1  0.378  0.356  0.443  1.0
  Co  Co9  1  0.361  0.649  0.716  1.0
  Co  Co10  1  0.139  0.649  0.216  1.0
  Co  Co11  1  0.122  0.356  0.943  1.0
  As  As12  1  0.555  0.127  0.705  1.0
  As  As13  1  0.345  0.368  0.119  1.0
  As  As14  1  0.945  0.127  0.205  1.0
  As  As15  1  0.445  0.873  0.295  1.0
  As  As16  1  0.655  0.632  0.881  1.0
  As  As17  1  0.845  0.632  0.381  1.0
  As  As18  1  0.055  0.873  0.795  1.0
  As  As19  1  0.155  0.368  0.619  1.0
  O  O20  1  0.769  0.131  0.194  1.0
  O  O21  1  0.512  0.627  0.376  1.0
  O  O22  1  0.507  0.110  0.367  1.0
  O  O23  1  0.007  0.890  0.133  1.0
  O  O24  1  0.480  0.633  0.881  1.0
  O  O25  1  0.269  0.869  0.306  1.0
  O  O26  1  0.980  0.367  0.619  1.0
  O  O27  1  0.257  0.603  0.047  1.0
  O  O28  1  0.488  0.373  0.624  1.0
  O  O29  1  0.757  0.397  0.453  1.0
  O  O30  1  0.012  0.373  0.124  1.0
  O  O31  1  0.278  0.386  0.272  1.0
  O  O32  1  0.988  0.627  0.876  1.0
  O  O33  1  0.493  0.882  0.135  1.0
  O  O34  1  0.231  0.157  0.535  1.0
  O  O35  1  0.769  0.843  0.465  1.0
  O  O36  1  0.778  0.614  0.228  1.0
  O  O37  1  0.520  0.367  0.119  1.0
  O  O38  1  0.269  0.157  0.035  1.0
  O  O39  1  0.020  0.633  0.381  1.0
  O  O40  1  0.507  0.118  0.865  1.0
  O  O41  1  0.231  0.869  0.806  1.0
  O  O42  1  0.993  0.118  0.365  1.0
  O  O43  1  0.222  0.386  0.772  1.0
  O  O44  1  0.493  0.890  0.633  1.0
  O  O45  1  0.731  0.843  0.965  1.0
  O  O46  1  0.722  0.614  0.728  1.0
  O  O47  1  0.731  0.131  0.694  1.0
  O  O48  1  0.993  0.110  0.867  1.0
  O  O49  1  0.007  0.882  0.635  1.0
  O  O50  1  0.243  0.603  0.547  1.0
  O  O51  1  0.743  0.397  0.953  1.0
[/CIF]
.
The crystal 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(4), one O(5), one O(8), and two equivalent O(7) atoms to form CoO6 octahedra that share  a cornercorner with one Co(3)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, corners with three equivalent As(1)O4 tetrahedra, corners with three equivalent As(2)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-62°. In the second Co site, Co(2) is bonded to one O(3), one O(5), one O(6), one O(8), and two equivalent O(2) atoms to form CoO6 octahedra that share  a cornercorner with one Co(3)O6 octahedra, corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one As(2)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, edges with two equivalent Co(3)O6 octahedra, and  an edgeedge with one As(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-55°. In the third Co site, Co(3) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form CoO6 octahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one As(2)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra, and  an edgeedge with one As(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 55-62°. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form AsO4 tetrahedra that share corners with three equivalent Co(1)O6 octahedra, corners with three equivalent Co(2)O6 octahedra, and corners with three equivalent Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-60°. In the second As site, As(2) is bonded to one O(4), one O(5), one O(6), and one O(8) atom to form AsO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra, corners with three equivalent Co(1)O6 octahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-59°. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one As(1) atom. In the second O site, O(8) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one As(2) atom. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(3), and one As(1) atom. In the fourth O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Co(3), two equivalent Co(2), and one As(1) atom. In the fifth O site, O(3) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one As(1) atom. In the sixth O site, O(4) 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(5) is bonded in a distorted trigonal pyramidal geometry to one Co(1), one Co(2), one Co(3), and one As(2) atom. In the eighth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), 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   9.660
_cell_length_b   5.828
_cell_length_c   10.275
_cell_angle_alpha   86.563
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   577.384
_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  0.134  0.889  0.464  1.0
  Co  Co1  1  0.878  0.644  0.057  1.0
  Co  Co2  1  0.622  0.644  0.557  1.0
  Co  Co3  1  0.639  0.351  0.284  1.0
  Co  Co4  1  0.634  0.111  0.036  1.0
  Co  Co5  1  0.366  0.889  0.964  1.0
  Co  Co6  1  0.861  0.351  0.784  1.0
  Co  Co7  1  0.866  0.111  0.536  1.0
  Co  Co8  1  0.378  0.356  0.443  1.0
  Co  Co9  1  0.361  0.649  0.716  1.0
  Co  Co10  1  0.139  0.649  0.216  1.0
  Co  Co11  1  0.122  0.356  0.943  1.0
  As  As12  1  0.555  0.127  0.705  1.0
  As  As13  1  0.345  0.368  0.119  1.0
  As  As14  1  0.945  0.127  0.205  1.0
  As  As15  1  0.445  0.873  0.295  1.0
  As  As16  1  0.655  0.632  0.881  1.0
  As  As17  1  0.845  0.632  0.381  1.0
  As  As18  1  0.055  0.873  0.795  1.0
  As  As19  1  0.155  0.368  0.619  1.0
  O  O20  1  0.769  0.131  0.194  1.0
  O  O21  1  0.512  0.627  0.376  1.0
  O  O22  1  0.507  0.110  0.367  1.0
  O  O23  1  0.007  0.890  0.133  1.0
  O  O24  1  0.480  0.633  0.881  1.0
  O  O25  1  0.269  0.869  0.306  1.0
  O  O26  1  0.980  0.367  0.619  1.0
  O  O27  1  0.257  0.603  0.047  1.0
  O  O28  1  0.488  0.373  0.624  1.0
  O  O29  1  0.757  0.397  0.453  1.0
  O  O30  1  0.012  0.373  0.124  1.0
  O  O31  1  0.278  0.386  0.272  1.0
  O  O32  1  0.988  0.627  0.876  1.0
  O  O33  1  0.493  0.882  0.135  1.0
  O  O34  1  0.231  0.157  0.535  1.0
  O  O35  1  0.769  0.843  0.465  1.0
  O  O36  1  0.778  0.614  0.228  1.0
  O  O37  1  0.520  0.367  0.119  1.0
  O  O38  1  0.269  0.157  0.035  1.0
  O  O39  1  0.020  0.633  0.381  1.0
  O  O40  1  0.507  0.118  0.865  1.0
  O  O41  1  0.231  0.869  0.806  1.0
  O  O42  1  0.993  0.118  0.365  1.0
  O  O43  1  0.222  0.386  0.772  1.0
  O  O44  1  0.493  0.890  0.633  1.0
  O  O45  1  0.731  0.843  0.965  1.0
  O  O46  1  0.722  0.614  0.728  1.0
  O  O47  1  0.731  0.131  0.694  1.0
  O  O48  1  0.993  0.110  0.867  1.0
  O  O49  1  0.007  0.882  0.635  1.0
  O  O50  1  0.243  0.603  0.547  1.0
  O  O51  1  0.743  0.397  0.953  1.0
[/CIF]
.