The crystal structure described by CuAs2O4 crystallizes in the tetragonal P4_2/mbc space group. Cu(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form distorted edge-sharing CuO6 octahedra. As(1) is bonded in a distorted T-shaped geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted trigonal planar geometry to one Cu(1) and two equivalent As(1) atoms. In the second O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Cu(1) and one As(1) atom. is represented by the CIF file [CIF]
data_Cu(AsO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.889
_cell_length_b   8.889
_cell_length_c   5.641
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   445.727
_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  0.500  0.000  0.250  1.0
  Cu  Cu1  1  0.000  0.500  0.750  1.0
  Cu  Cu2  1  0.500  0.000  0.750  1.0
  Cu  Cu3  1  0.000  0.500  0.250  1.0
  As  As4  1  0.843  0.792  0.000  1.0
  As  As5  1  0.792  0.157  0.500  1.0
  As  As6  1  0.208  0.843  0.500  1.0
  As  As7  1  0.157  0.208  0.000  1.0
  As  As8  1  0.343  0.708  0.000  1.0
  As  As9  1  0.657  0.292  0.000  1.0
  As  As10  1  0.708  0.657  0.500  1.0
  As  As11  1  0.292  0.343  0.500  1.0
  O  O12  1  0.408  0.878  0.500  1.0
  O  O13  1  0.592  0.122  0.500  1.0
  O  O14  1  0.122  0.408  0.000  1.0
  O  O15  1  0.878  0.592  0.000  1.0
  O  O16  1  0.378  0.908  0.000  1.0
  O  O17  1  0.908  0.622  0.500  1.0
  O  O18  1  0.092  0.378  0.500  1.0
  O  O19  1  0.622  0.092  0.000  1.0
  O  O20  1  0.208  0.708  0.750  1.0
  O  O21  1  0.708  0.792  0.250  1.0
  O  O22  1  0.292  0.208  0.250  1.0
  O  O23  1  0.792  0.292  0.750  1.0
  O  O24  1  0.208  0.708  0.250  1.0
  O  O25  1  0.708  0.792  0.750  1.0
  O  O26  1  0.292  0.208  0.750  1.0
  O  O27  1  0.792  0.292  0.250  1.0
[/CIF]
.
The crystal structure described by CuAs2O4 crystallizes in the tetragonal P4_2/mbc space group. Cu(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form distorted edge-sharing CuO6 octahedra. As(1) is bonded in a distorted T-shaped geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted trigonal planar geometry to one Cu(1) and two equivalent As(1) atoms. In the second O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Cu(1) and one As(1) atom. is represented by the CIF file [CIF]
data_Cu(AsO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.889
_cell_length_b   8.889
_cell_length_c   5.641
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   445.727
_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  0.500  0.000  0.250  1.0
  Cu  Cu1  1  0.000  0.500  0.750  1.0
  Cu  Cu2  1  0.500  0.000  0.750  1.0
  Cu  Cu3  1  0.000  0.500  0.250  1.0
  As  As4  1  0.843  0.792  0.000  1.0
  As  As5  1  0.792  0.157  0.500  1.0
  As  As6  1  0.208  0.843  0.500  1.0
  As  As7  1  0.157  0.208  0.000  1.0
  As  As8  1  0.343  0.708  0.000  1.0
  As  As9  1  0.657  0.292  0.000  1.0
  As  As10  1  0.708  0.657  0.500  1.0
  As  As11  1  0.292  0.343  0.500  1.0
  O  O12  1  0.408  0.878  0.500  1.0
  O  O13  1  0.592  0.122  0.500  1.0
  O  O14  1  0.122  0.408  0.000  1.0
  O  O15  1  0.878  0.592  0.000  1.0
  O  O16  1  0.378  0.908  0.000  1.0
  O  O17  1  0.908  0.622  0.500  1.0
  O  O18  1  0.092  0.378  0.500  1.0
  O  O19  1  0.622  0.092  0.000  1.0
  O  O20  1  0.208  0.708  0.750  1.0
  O  O21  1  0.708  0.792  0.250  1.0
  O  O22  1  0.292  0.208  0.250  1.0
  O  O23  1  0.792  0.292  0.750  1.0
  O  O24  1  0.208  0.708  0.250  1.0
  O  O25  1  0.708  0.792  0.750  1.0
  O  O26  1  0.292  0.208  0.750  1.0
  O  O27  1  0.792  0.292  0.250  1.0
[/CIF]
.