The material structure described by Co3Ag(AsO4)3 crystallizes in the monoclinic C2/c space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form distorted CoO6 octahedra that share corners with two equivalent As(1)O4 tetrahedra, corners with four equivalent As(2)O4 tetrahedra, and edges with two equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to one O(1), one O(3), one O(4), one O(6), and two equivalent O(5) atoms to form CoO6 octahedra that share corners with two equivalent As(1)O4 tetrahedra, corners with four equivalent As(2)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(2)O6 octahedra. Ag(1) is bonded in a rectangular see-saw-like geometry to four equivalent O(1) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded to two equivalent O(3) and two equivalent O(6) atoms to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-59°. In the second As site, As(2) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-63°. There are six inequivalent O sites. In the first O site, O(2) is bonded in a bent 120 degrees geometry to one Co(1) and one As(2) atom. In the second O site, O(3) is bonded in a bent 120 degrees geometry to one Co(2) and one As(1) atom. In the third O site, O(4) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one As(2) atom. In the fourth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Co(2) and one As(2) atom. In the fifth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one As(1) atom. In the sixth O site, O(1) is bonded to one Co(2), two equivalent Ag(1), and one As(2) atom to form a mixture of distorted edge and corner-sharing OCoAg2As trigonal pyramids. is represented by the CIF file [CIF]
data_Co3Ag(AsO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.742
_cell_length_b   8.742
_cell_length_c   6.791
_cell_angle_alpha   74.377
_cell_angle_beta   74.377
_cell_angle_gamma   93.871
_symmetry_Int_Tables_number   1
_cell_volume   475.756
_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
  Co  Co0  1  0.724  0.276  0.750  1.0
  Co  Co1  1  0.276  0.724  0.250  1.0
  Co  Co2  1  0.054  0.376  0.875  1.0
  Co  Co3  1  0.624  0.946  0.625  1.0
  Co  Co4  1  0.946  0.624  0.125  1.0
  Co  Co5  1  0.376  0.054  0.375  1.0
  Ag  Ag6  1  0.013  0.987  0.750  1.0
  Ag  Ag7  1  0.987  0.013  0.250  1.0
  As  As8  1  0.305  0.695  0.750  1.0
  As  As9  1  0.695  0.305  0.250  1.0
  As  As10  1  0.878  0.654  0.618  1.0
  As  As11  1  0.346  0.122  0.882  1.0
  As  As12  1  0.122  0.346  0.382  1.0
  As  As13  1  0.654  0.878  0.118  1.0
  O  O14  1  0.151  0.164  0.900  1.0
  O  O15  1  0.836  0.849  0.600  1.0
  O  O16  1  0.849  0.836  0.100  1.0
  O  O17  1  0.164  0.151  0.400  1.0
  O  O18  1  0.720  0.516  0.665  1.0
  O  O19  1  0.484  0.280  0.835  1.0
  O  O20  1  0.280  0.484  0.335  1.0
  O  O21  1  0.516  0.720  0.165  1.0
  O  O22  1  0.262  0.495  0.767  1.0
  O  O23  1  0.505  0.738  0.733  1.0
  O  O24  1  0.738  0.505  0.233  1.0
  O  O25  1  0.495  0.262  0.267  1.0
  O  O26  1  0.981  0.326  0.631  1.0
  O  O27  1  0.674  0.019  0.869  1.0
  O  O28  1  0.019  0.674  0.369  1.0
  O  O29  1  0.326  0.981  0.131  1.0
  O  O30  1  0.975  0.602  0.818  1.0
  O  O31  1  0.398  0.025  0.682  1.0
  O  O32  1  0.025  0.398  0.182  1.0
  O  O33  1  0.602  0.975  0.318  1.0
  O  O34  1  0.186  0.727  0.982  1.0
  O  O35  1  0.273  0.814  0.518  1.0
  O  O36  1  0.814  0.273  0.018  1.0
  O  O37  1  0.727  0.186  0.482  1.0
[/CIF]
.
The material structure described by Co3Ag(AsO4)3 crystallizes in the monoclinic C2/c space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form distorted CoO6 octahedra that share corners with two equivalent As(1)O4 tetrahedra, corners with four equivalent As(2)O4 tetrahedra, and edges with two equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to one O(1), one O(3), one O(4), one O(6), and two equivalent O(5) atoms to form CoO6 octahedra that share corners with two equivalent As(1)O4 tetrahedra, corners with four equivalent As(2)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(2)O6 octahedra. Ag(1) is bonded in a rectangular see-saw-like geometry to four equivalent O(1) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded to two equivalent O(3) and two equivalent O(6) atoms to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-59°. In the second As site, As(2) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-63°. There are six inequivalent O sites. In the first O site, O(2) is bonded in a bent 120 degrees geometry to one Co(1) and one As(2) atom. In the second O site, O(3) is bonded in a bent 120 degrees geometry to one Co(2) and one As(1) atom. In the third O site, O(4) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one As(2) atom. In the fourth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Co(2) and one As(2) atom. In the fifth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one As(1) atom. In the sixth O site, O(1) is bonded to one Co(2), two equivalent Ag(1), and one As(2) atom to form a mixture of distorted edge and corner-sharing OCoAg2As trigonal pyramids. is represented by the CIF file [CIF]
data_Co3Ag(AsO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.742
_cell_length_b   8.742
_cell_length_c   6.791
_cell_angle_alpha   74.377
_cell_angle_beta   74.377
_cell_angle_gamma   93.871
_symmetry_Int_Tables_number   1
_cell_volume   475.756
_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
  Co  Co0  1  0.724  0.276  0.750  1.0
  Co  Co1  1  0.276  0.724  0.250  1.0
  Co  Co2  1  0.054  0.376  0.875  1.0
  Co  Co3  1  0.624  0.946  0.625  1.0
  Co  Co4  1  0.946  0.624  0.125  1.0
  Co  Co5  1  0.376  0.054  0.375  1.0
  Ag  Ag6  1  0.013  0.987  0.750  1.0
  Ag  Ag7  1  0.987  0.013  0.250  1.0
  As  As8  1  0.305  0.695  0.750  1.0
  As  As9  1  0.695  0.305  0.250  1.0
  As  As10  1  0.878  0.654  0.618  1.0
  As  As11  1  0.346  0.122  0.882  1.0
  As  As12  1  0.122  0.346  0.382  1.0
  As  As13  1  0.654  0.878  0.118  1.0
  O  O14  1  0.151  0.164  0.900  1.0
  O  O15  1  0.836  0.849  0.600  1.0
  O  O16  1  0.849  0.836  0.100  1.0
  O  O17  1  0.164  0.151  0.400  1.0
  O  O18  1  0.720  0.516  0.665  1.0
  O  O19  1  0.484  0.280  0.835  1.0
  O  O20  1  0.280  0.484  0.335  1.0
  O  O21  1  0.516  0.720  0.165  1.0
  O  O22  1  0.262  0.495  0.767  1.0
  O  O23  1  0.505  0.738  0.733  1.0
  O  O24  1  0.738  0.505  0.233  1.0
  O  O25  1  0.495  0.262  0.267  1.0
  O  O26  1  0.981  0.326  0.631  1.0
  O  O27  1  0.674  0.019  0.869  1.0
  O  O28  1  0.019  0.674  0.369  1.0
  O  O29  1  0.326  0.981  0.131  1.0
  O  O30  1  0.975  0.602  0.818  1.0
  O  O31  1  0.398  0.025  0.682  1.0
  O  O32  1  0.025  0.398  0.182  1.0
  O  O33  1  0.602  0.975  0.318  1.0
  O  O34  1  0.186  0.727  0.982  1.0
  O  O35  1  0.273  0.814  0.518  1.0
  O  O36  1  0.814  0.273  0.018  1.0
  O  O37  1  0.727  0.186  0.482  1.0
[/CIF]
.