The structure described by Zn3(AsO3)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(2), one O(6), and two equivalent O(3) atoms to form corner-sharing ZnO4 tetrahedra. In the second Zn site, Zn(2) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form a mixture of corner and edge-sharing ZnO4 tetrahedra. In the third Zn site, Zn(3) is bonded to one O(4), one O(6), and two equivalent O(5) atoms to form corner-sharing ZnO4 tetrahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted T-shaped geometry to one O(1), one O(5), and one O(6) atom. In the second As site, As(2) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(3), and one O(4) atom. There are six inequivalent O sites. In the first O site, O(4) is bonded in a trigonal planar geometry to one Zn(2), one Zn(3), and one As(2) atom. In the second O site, O(5) is bonded in a trigonal planar geometry to two equivalent Zn(3) and one As(1) atom. In the third O site, O(6) is bonded in a trigonal planar geometry to one Zn(1), one Zn(3), and one As(1) atom. In the fourth O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Zn(2) and one As(1) atom. In the fifth O site, O(2) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one As(2) atom. In the sixth O site, O(3) is bonded in a trigonal planar geometry to two equivalent Zn(1) and one As(2) atom. is represented by the CIF file [CIF]
data_Zn3(AsO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.182
_cell_length_b   8.253
_cell_length_c   15.837
_cell_angle_alpha   97.461
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   671.583
_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
  Zn  Zn0  1  0.646  0.869  0.740  1.0
  Zn  Zn1  1  0.146  0.131  0.760  1.0
  Zn  Zn2  1  0.354  0.131  0.260  1.0
  Zn  Zn3  1  0.854  0.869  0.240  1.0
  Zn  Zn4  1  0.127  0.389  0.933  1.0
  Zn  Zn5  1  0.627  0.611  0.567  1.0
  Zn  Zn6  1  0.873  0.611  0.067  1.0
  Zn  Zn7  1  0.373  0.389  0.433  1.0
  Zn  Zn8  1  0.549  0.511  0.811  1.0
  Zn  Zn9  1  0.049  0.489  0.689  1.0
  Zn  Zn10  1  0.451  0.489  0.189  1.0
  Zn  Zn11  1  0.951  0.511  0.311  1.0
  As  As12  1  0.041  0.743  0.870  1.0
  As  As13  1  0.541  0.257  0.630  1.0
  As  As14  1  0.959  0.257  0.130  1.0
  As  As15  1  0.459  0.743  0.370  1.0
  As  As16  1  0.631  0.166  0.894  1.0
  As  As17  1  0.131  0.834  0.606  1.0
  As  As18  1  0.369  0.834  0.106  1.0
  As  As19  1  0.869  0.166  0.394  1.0
  O  O20  1  0.992  0.614  0.949  1.0
  O  O21  1  0.492  0.386  0.551  1.0
  O  O22  1  0.008  0.386  0.051  1.0
  O  O23  1  0.508  0.614  0.449  1.0
  O  O24  1  0.940  0.223  0.856  1.0
  O  O25  1  0.440  0.777  0.644  1.0
  O  O26  1  0.060  0.777  0.144  1.0
  O  O27  1  0.560  0.223  0.356  1.0
  O  O28  1  0.500  0.074  0.795  1.0
  O  O29  1  0.000  0.926  0.705  1.0
  O  O30  1  0.500  0.926  0.205  1.0
  O  O31  1  1.000  0.074  0.295  1.0
  O  O32  1  0.482  0.362  0.895  1.0
  O  O33  1  0.982  0.638  0.605  1.0
  O  O34  1  0.518  0.638  0.105  1.0
  O  O35  1  0.018  0.362  0.395  1.0
  O  O36  1  0.691  0.414  0.702  1.0
  O  O37  1  0.191  0.586  0.798  1.0
  O  O38  1  0.309  0.586  0.298  1.0
  O  O39  1  0.809  0.414  0.202  1.0
  O  O40  1  0.725  0.722  0.824  1.0
  O  O41  1  0.226  0.278  0.676  1.0
  O  O42  1  0.274  0.278  0.176  1.0
  O  O43  1  0.775  0.722  0.324  1.0
[/CIF]
.
The structure described by Zn3(AsO3)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(2), one O(6), and two equivalent O(3) atoms to form corner-sharing ZnO4 tetrahedra. In the second Zn site, Zn(2) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form a mixture of corner and edge-sharing ZnO4 tetrahedra. In the third Zn site, Zn(3) is bonded to one O(4), one O(6), and two equivalent O(5) atoms to form corner-sharing ZnO4 tetrahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted T-shaped geometry to one O(1), one O(5), and one O(6) atom. In the second As site, As(2) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(3), and one O(4) atom. There are six inequivalent O sites. In the first O site, O(4) is bonded in a trigonal planar geometry to one Zn(2), one Zn(3), and one As(2) atom. In the second O site, O(5) is bonded in a trigonal planar geometry to two equivalent Zn(3) and one As(1) atom. In the third O site, O(6) is bonded in a trigonal planar geometry to one Zn(1), one Zn(3), and one As(1) atom. In the fourth O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Zn(2) and one As(1) atom. In the fifth O site, O(2) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one As(2) atom. In the sixth O site, O(3) is bonded in a trigonal planar geometry to two equivalent Zn(1) and one As(2) atom. is represented by the CIF file [CIF]
data_Zn3(AsO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.182
_cell_length_b   8.253
_cell_length_c   15.837
_cell_angle_alpha   97.461
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   671.583
_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
  Zn  Zn0  1  0.646  0.869  0.740  1.0
  Zn  Zn1  1  0.146  0.131  0.760  1.0
  Zn  Zn2  1  0.354  0.131  0.260  1.0
  Zn  Zn3  1  0.854  0.869  0.240  1.0
  Zn  Zn4  1  0.127  0.389  0.933  1.0
  Zn  Zn5  1  0.627  0.611  0.567  1.0
  Zn  Zn6  1  0.873  0.611  0.067  1.0
  Zn  Zn7  1  0.373  0.389  0.433  1.0
  Zn  Zn8  1  0.549  0.511  0.811  1.0
  Zn  Zn9  1  0.049  0.489  0.689  1.0
  Zn  Zn10  1  0.451  0.489  0.189  1.0
  Zn  Zn11  1  0.951  0.511  0.311  1.0
  As  As12  1  0.041  0.743  0.870  1.0
  As  As13  1  0.541  0.257  0.630  1.0
  As  As14  1  0.959  0.257  0.130  1.0
  As  As15  1  0.459  0.743  0.370  1.0
  As  As16  1  0.631  0.166  0.894  1.0
  As  As17  1  0.131  0.834  0.606  1.0
  As  As18  1  0.369  0.834  0.106  1.0
  As  As19  1  0.869  0.166  0.394  1.0
  O  O20  1  0.992  0.614  0.949  1.0
  O  O21  1  0.492  0.386  0.551  1.0
  O  O22  1  0.008  0.386  0.051  1.0
  O  O23  1  0.508  0.614  0.449  1.0
  O  O24  1  0.940  0.223  0.856  1.0
  O  O25  1  0.440  0.777  0.644  1.0
  O  O26  1  0.060  0.777  0.144  1.0
  O  O27  1  0.560  0.223  0.356  1.0
  O  O28  1  0.500  0.074  0.795  1.0
  O  O29  1  0.000  0.926  0.705  1.0
  O  O30  1  0.500  0.926  0.205  1.0
  O  O31  1  1.000  0.074  0.295  1.0
  O  O32  1  0.482  0.362  0.895  1.0
  O  O33  1  0.982  0.638  0.605  1.0
  O  O34  1  0.518  0.638  0.105  1.0
  O  O35  1  0.018  0.362  0.395  1.0
  O  O36  1  0.691  0.414  0.702  1.0
  O  O37  1  0.191  0.586  0.798  1.0
  O  O38  1  0.309  0.586  0.298  1.0
  O  O39  1  0.809  0.414  0.202  1.0
  O  O40  1  0.725  0.722  0.824  1.0
  O  O41  1  0.226  0.278  0.676  1.0
  O  O42  1  0.274  0.278  0.176  1.0
  O  O43  1  0.775  0.722  0.324  1.0
[/CIF]
.