The material structure described by Cu3(AsO4)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form CuO5 trigonal bipyramids that share corners with two equivalent As(2)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra,  a cornercorner with one Cu(2)O5 trigonal bipyramid,  a cornercorner with one Cu(3)O5 trigonal bipyramid, and  an edgeedge with one Cu(3)O5 trigonal bipyramid. In the second Cu site, Cu(2) is bonded to one O(1), one O(4), one O(5), and two equivalent O(6) atoms to form distorted CuO5 trigonal bipyramids that share corners with two equivalent As(1)O4 tetrahedra, corners with three equivalent As(2)O4 tetrahedra,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  an edgeedge with one Cu(2)O5 trigonal bipyramid, and  an edgeedge with one Cu(3)O5 trigonal bipyramid. In the third Cu site, Cu(3) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(8) atom to form CuO5 trigonal bipyramids that share corners with two equivalent As(1)O4 tetrahedra, corners with three equivalent As(2)O4 tetrahedra,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  an edgeedge with one Cu(1)O5 trigonal bipyramid, and  an edgeedge with one Cu(2)O5 trigonal bipyramid. There are two inequivalent As sites. In the first As site, As(1) 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 two equivalent Cu(2)O5 trigonal bipyramids, corners with two equivalent Cu(3)O5 trigonal bipyramids, and corners with three equivalent Cu(1)O5 trigonal bipyramids. In the second As site, As(2) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form AsO4 tetrahedra that share corners with two equivalent Cu(1)O5 trigonal bipyramids, corners with three equivalent Cu(2)O5 trigonal bipyramids, and corners with three equivalent Cu(3)O5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal planar geometry to one Cu(2), one Cu(3), and one As(2) atom. In the second O site, O(5) is bonded in a trigonal planar geometry to one Cu(1), one Cu(2), and one As(1) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Cu(2) and one As(2) atom. In the fourth O site, O(7) is bonded in a bent 120 degrees geometry to one Cu(1) and one As(1) atom. In the fifth O site, O(8) is bonded in a trigonal planar geometry to one Cu(1), one Cu(3), and one As(2) atom. In the sixth O site, O(1) is bonded in a trigonal planar geometry to one Cu(2), one Cu(3), and one As(1) atom. In the seventh O site, O(2) is bonded in a distorted trigonal planar geometry to one Cu(1), one Cu(3), and one As(2) atom. In the eighth O site, O(3) is bonded in a distorted trigonal planar geometry to one Cu(1), one Cu(3), and one As(1) atom. is represented by the CIF file [CIF]
data_Cu3(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.307
_cell_length_b   8.642
_cell_length_c   11.327
_cell_angle_alpha   90.000
_cell_angle_beta   92.598
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   616.713
_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
  Cu  Cu0  1  0.239  0.160  0.633  1.0
  Cu  Cu1  1  0.761  0.660  0.867  1.0
  Cu  Cu2  1  0.761  0.840  0.367  1.0
  Cu  Cu3  1  0.239  0.340  0.133  1.0
  Cu  Cu4  1  0.617  0.029  0.879  1.0
  Cu  Cu5  1  0.383  0.529  0.621  1.0
  Cu  Cu6  1  0.383  0.971  0.121  1.0
  Cu  Cu7  1  0.617  0.471  0.379  1.0
  Cu  Cu8  1  0.909  0.191  0.432  1.0
  Cu  Cu9  1  0.091  0.691  0.068  1.0
  Cu  Cu10  1  0.091  0.809  0.568  1.0
  Cu  Cu11  1  0.909  0.309  0.932  1.0
  As  As12  1  0.416  0.115  0.368  1.0
  As  As13  1  0.584  0.615  0.132  1.0
  As  As14  1  0.584  0.885  0.632  1.0
  As  As15  1  0.416  0.385  0.868  1.0
  As  As16  1  0.896  0.062  0.151  1.0
  As  As17  1  0.104  0.562  0.349  1.0
  As  As18  1  0.104  0.938  0.849  1.0
  As  As19  1  0.896  0.438  0.651  1.0
  O  O20  1  0.607  0.243  0.419  1.0
  O  O21  1  0.393  0.743  0.081  1.0
  O  O22  1  0.393  0.757  0.581  1.0
  O  O23  1  0.607  0.257  0.919  1.0
  O  O24  1  0.957  0.246  0.106  1.0
  O  O25  1  0.043  0.746  0.394  1.0
  O  O26  1  0.043  0.754  0.894  1.0
  O  O27  1  0.957  0.254  0.606  1.0
  O  O28  1  0.203  0.133  0.455  1.0
  O  O29  1  0.797  0.633  0.045  1.0
  O  O30  1  0.797  0.867  0.545  1.0
  O  O31  1  0.203  0.367  0.955  1.0
  O  O32  1  0.086  0.931  0.119  1.0
  O  O33  1  0.914  0.431  0.381  1.0
  O  O34  1  0.914  0.069  0.881  1.0
  O  O35  1  0.086  0.569  0.619  1.0
  O  O36  1  0.342  0.156  0.223  1.0
  O  O37  1  0.658  0.656  0.277  1.0
  O  O38  1  0.658  0.844  0.777  1.0
  O  O39  1  0.342  0.344  0.723  1.0
  O  O40  1  0.671  0.996  0.082  1.0
  O  O41  1  0.329  0.496  0.418  1.0
  O  O42  1  0.329  0.004  0.918  1.0
  O  O43  1  0.671  0.504  0.582  1.0
  O  O44  1  0.485  0.927  0.367  1.0
  O  O45  1  0.515  0.427  0.133  1.0
  O  O46  1  0.515  0.073  0.633  1.0
  O  O47  1  0.485  0.573  0.867  1.0
  O  O48  1  0.869  0.051  0.300  1.0
  O  O49  1  0.131  0.551  0.200  1.0
  O  O50  1  0.131  0.949  0.700  1.0
  O  O51  1  0.869  0.449  0.800  1.0
[/CIF]
.
The material structure described by Cu3(AsO4)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form CuO5 trigonal bipyramids that share corners with two equivalent As(2)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra,  a cornercorner with one Cu(2)O5 trigonal bipyramid,  a cornercorner with one Cu(3)O5 trigonal bipyramid, and  an edgeedge with one Cu(3)O5 trigonal bipyramid. In the second Cu site, Cu(2) is bonded to one O(1), one O(4), one O(5), and two equivalent O(6) atoms to form distorted CuO5 trigonal bipyramids that share corners with two equivalent As(1)O4 tetrahedra, corners with three equivalent As(2)O4 tetrahedra,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  an edgeedge with one Cu(2)O5 trigonal bipyramid, and  an edgeedge with one Cu(3)O5 trigonal bipyramid. In the third Cu site, Cu(3) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(8) atom to form CuO5 trigonal bipyramids that share corners with two equivalent As(1)O4 tetrahedra, corners with three equivalent As(2)O4 tetrahedra,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  an edgeedge with one Cu(1)O5 trigonal bipyramid, and  an edgeedge with one Cu(2)O5 trigonal bipyramid. There are two inequivalent As sites. In the first As site, As(1) 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 two equivalent Cu(2)O5 trigonal bipyramids, corners with two equivalent Cu(3)O5 trigonal bipyramids, and corners with three equivalent Cu(1)O5 trigonal bipyramids. In the second As site, As(2) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form AsO4 tetrahedra that share corners with two equivalent Cu(1)O5 trigonal bipyramids, corners with three equivalent Cu(2)O5 trigonal bipyramids, and corners with three equivalent Cu(3)O5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal planar geometry to one Cu(2), one Cu(3), and one As(2) atom. In the second O site, O(5) is bonded in a trigonal planar geometry to one Cu(1), one Cu(2), and one As(1) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Cu(2) and one As(2) atom. In the fourth O site, O(7) is bonded in a bent 120 degrees geometry to one Cu(1) and one As(1) atom. In the fifth O site, O(8) is bonded in a trigonal planar geometry to one Cu(1), one Cu(3), and one As(2) atom. In the sixth O site, O(1) is bonded in a trigonal planar geometry to one Cu(2), one Cu(3), and one As(1) atom. In the seventh O site, O(2) is bonded in a distorted trigonal planar geometry to one Cu(1), one Cu(3), and one As(2) atom. In the eighth O site, O(3) is bonded in a distorted trigonal planar geometry to one Cu(1), one Cu(3), and one As(1) atom. is represented by the CIF file [CIF]
data_Cu3(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.307
_cell_length_b   8.642
_cell_length_c   11.327
_cell_angle_alpha   90.000
_cell_angle_beta   92.598
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   616.713
_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
  Cu  Cu0  1  0.239  0.160  0.633  1.0
  Cu  Cu1  1  0.761  0.660  0.867  1.0
  Cu  Cu2  1  0.761  0.840  0.367  1.0
  Cu  Cu3  1  0.239  0.340  0.133  1.0
  Cu  Cu4  1  0.617  0.029  0.879  1.0
  Cu  Cu5  1  0.383  0.529  0.621  1.0
  Cu  Cu6  1  0.383  0.971  0.121  1.0
  Cu  Cu7  1  0.617  0.471  0.379  1.0
  Cu  Cu8  1  0.909  0.191  0.432  1.0
  Cu  Cu9  1  0.091  0.691  0.068  1.0
  Cu  Cu10  1  0.091  0.809  0.568  1.0
  Cu  Cu11  1  0.909  0.309  0.932  1.0
  As  As12  1  0.416  0.115  0.368  1.0
  As  As13  1  0.584  0.615  0.132  1.0
  As  As14  1  0.584  0.885  0.632  1.0
  As  As15  1  0.416  0.385  0.868  1.0
  As  As16  1  0.896  0.062  0.151  1.0
  As  As17  1  0.104  0.562  0.349  1.0
  As  As18  1  0.104  0.938  0.849  1.0
  As  As19  1  0.896  0.438  0.651  1.0
  O  O20  1  0.607  0.243  0.419  1.0
  O  O21  1  0.393  0.743  0.081  1.0
  O  O22  1  0.393  0.757  0.581  1.0
  O  O23  1  0.607  0.257  0.919  1.0
  O  O24  1  0.957  0.246  0.106  1.0
  O  O25  1  0.043  0.746  0.394  1.0
  O  O26  1  0.043  0.754  0.894  1.0
  O  O27  1  0.957  0.254  0.606  1.0
  O  O28  1  0.203  0.133  0.455  1.0
  O  O29  1  0.797  0.633  0.045  1.0
  O  O30  1  0.797  0.867  0.545  1.0
  O  O31  1  0.203  0.367  0.955  1.0
  O  O32  1  0.086  0.931  0.119  1.0
  O  O33  1  0.914  0.431  0.381  1.0
  O  O34  1  0.914  0.069  0.881  1.0
  O  O35  1  0.086  0.569  0.619  1.0
  O  O36  1  0.342  0.156  0.223  1.0
  O  O37  1  0.658  0.656  0.277  1.0
  O  O38  1  0.658  0.844  0.777  1.0
  O  O39  1  0.342  0.344  0.723  1.0
  O  O40  1  0.671  0.996  0.082  1.0
  O  O41  1  0.329  0.496  0.418  1.0
  O  O42  1  0.329  0.004  0.918  1.0
  O  O43  1  0.671  0.504  0.582  1.0
  O  O44  1  0.485  0.927  0.367  1.0
  O  O45  1  0.515  0.427  0.133  1.0
  O  O46  1  0.515  0.073  0.633  1.0
  O  O47  1  0.485  0.573  0.867  1.0
  O  O48  1  0.869  0.051  0.300  1.0
  O  O49  1  0.131  0.551  0.200  1.0
  O  O50  1  0.131  0.949  0.700  1.0
  O  O51  1  0.869  0.449  0.800  1.0
[/CIF]
.