The compound described by CuZn2(AsO4)2 crystallizes in the triclinic P-1 space group. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. Zn(1) is bonded to one O(1), one O(2), one O(4), and two equivalent O(3) atoms to form ZnO5 trigonal bipyramids that share corners with five equivalent As(1)O4 tetrahedra and  an edgeedge with one Zn(1)O5 trigonal bipyramid. As(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form AsO4 tetrahedra that share corners with five equivalent Zn(1)O5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Cu(1), one Zn(1), and one As(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one As(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Zn(1) and one As(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Cu(1), one Zn(1), and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zn2Cu(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.158
_cell_length_b   5.418
_cell_length_c   6.857
_cell_angle_alpha   110.107
_cell_angle_beta   87.296
_cell_angle_gamma   112.306
_symmetry_Int_Tables_number   1
_cell_volume   165.693
_cell_formula_units_Z   1
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
  Zn  Zn0  1  0.773  0.256  0.811  1.0
  Zn  Zn1  1  0.227  0.744  0.189  1.0
  Cu  Cu2  1  0.500  0.500  0.500  1.0
  As  As3  1  0.136  0.852  0.724  1.0
  As  As4  1  0.864  0.148  0.276  1.0
  O  O5  1  0.733  0.297  0.508  1.0
  O  O6  1  0.267  0.703  0.492  1.0
  O  O7  1  0.628  0.811  0.151  1.0
  O  O8  1  0.372  0.189  0.849  1.0
  O  O9  1  0.912  0.353  0.123  1.0
  O  O10  1  0.818  0.870  0.666  1.0
  O  O11  1  0.182  0.130  0.334  1.0
  O  O12  1  0.088  0.647  0.877  1.0
[/CIF]
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The compound described by CuZn2(AsO4)2 crystallizes in the triclinic P-1 space group. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. Zn(1) is bonded to one O(1), one O(2), one O(4), and two equivalent O(3) atoms to form ZnO5 trigonal bipyramids that share corners with five equivalent As(1)O4 tetrahedra and  an edgeedge with one Zn(1)O5 trigonal bipyramid. As(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form AsO4 tetrahedra that share corners with five equivalent Zn(1)O5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Cu(1), one Zn(1), and one As(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one As(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Zn(1) and one As(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Cu(1), one Zn(1), and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zn2Cu(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.158
_cell_length_b   5.418
_cell_length_c   6.857
_cell_angle_alpha   110.107
_cell_angle_beta   87.296
_cell_angle_gamma   112.306
_symmetry_Int_Tables_number   1
_cell_volume   165.693
_cell_formula_units_Z   1
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
  Zn  Zn0  1  0.773  0.256  0.811  1.0
  Zn  Zn1  1  0.227  0.744  0.189  1.0
  Cu  Cu2  1  0.500  0.500  0.500  1.0
  As  As3  1  0.136  0.852  0.724  1.0
  As  As4  1  0.864  0.148  0.276  1.0
  O  O5  1  0.733  0.297  0.508  1.0
  O  O6  1  0.267  0.703  0.492  1.0
  O  O7  1  0.628  0.811  0.151  1.0
  O  O8  1  0.372  0.189  0.849  1.0
  O  O9  1  0.912  0.353  0.123  1.0
  O  O10  1  0.818  0.870  0.666  1.0
  O  O11  1  0.182  0.130  0.334  1.0
  O  O12  1  0.088  0.647  0.877  1.0
[/CIF]
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