The material structure described by BaZn2(AsO4)2 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form ZnO4 tetrahedra that share  a cornercorner with one As(2)O4 tetrahedra and corners with three equivalent As(1)O4 tetrahedra. In the second Zn site, Zn(2) is bonded to one O(1), one O(4), one O(6), and one O(8) atom to form ZnO4 tetrahedra that share  a cornercorner with one As(1)O4 tetrahedra and corners with three equivalent As(2)O4 tetrahedra. 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  a cornercorner with one Zn(2)O4 tetrahedra and corners with three equivalent Zn(1)O4 tetrahedra. 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  a cornercorner with one Zn(1)O4 tetrahedra and corners with three equivalent Zn(2)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal planar geometry to one Ba(1), one Zn(2), and one As(2) atom. In the second O site, O(5) is bonded in a 3-coordinate geometry to one Ba(1), one Zn(1), and one As(1) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to one Ba(1), one Zn(2), and one As(2) atom. In the fourth O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Zn(1), and one As(1) atom. In the fifth O site, O(8) is bonded in a 3-coordinate geometry to one Ba(1), one Zn(2), and one As(2) atom. In the sixth O site, O(1) is bonded in a distorted trigonal planar geometry to one Ba(1), one Zn(2), and one As(1) atom. In the seventh O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one As(2) atom. In the eighth O site, O(3) is bonded in a distorted trigonal planar geometry to one Ba(1), one Zn(1), and one As(1) atom. is represented by the CIF card [CIF]
data_BaZn2(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.200
_cell_length_b   8.965
_cell_length_c   9.587
_cell_angle_alpha   88.581
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   876.402
_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
  Ba  Ba0  1  0.916  0.251  0.609  1.0
  Ba  Ba1  1  0.416  0.749  0.891  1.0
  Ba  Ba2  1  0.084  0.749  0.391  1.0
  Ba  Ba3  1  0.584  0.251  0.109  1.0
  Zn  Zn4  1  0.686  0.580  0.442  1.0
  Zn  Zn5  1  0.186  0.420  0.058  1.0
  Zn  Zn6  1  0.314  0.420  0.558  1.0
  Zn  Zn7  1  0.814  0.580  0.942  1.0
  Zn  Zn8  1  0.923  0.072  0.217  1.0
  Zn  Zn9  1  0.423  0.928  0.283  1.0
  Zn  Zn10  1  0.077  0.928  0.783  1.0
  Zn  Zn11  1  0.577  0.072  0.717  1.0
  As  As12  1  0.413  0.560  0.258  1.0
  As  As13  1  0.913  0.440  0.242  1.0
  As  As14  1  0.587  0.440  0.742  1.0
  As  As15  1  0.087  0.560  0.758  1.0
  As  As16  1  0.201  0.053  0.068  1.0
  As  As17  1  0.701  0.947  0.432  1.0
  As  As18  1  0.799  0.947  0.932  1.0
  As  As19  1  0.299  0.053  0.568  1.0
  O  O20  1  0.420  0.736  0.183  1.0
  O  O21  1  0.920  0.264  0.317  1.0
  O  O22  1  0.580  0.264  0.817  1.0
  O  O23  1  0.080  0.736  0.683  1.0
  O  O24  1  0.643  0.781  0.497  1.0
  O  O25  1  0.143  0.219  0.003  1.0
  O  O26  1  0.357  0.219  0.503  1.0
  O  O27  1  0.857  0.781  0.997  1.0
  O  O28  1  0.697  0.439  0.607  1.0
  O  O29  1  0.197  0.561  0.893  1.0
  O  O30  1  0.303  0.561  0.393  1.0
  O  O31  1  0.803  0.439  0.107  1.0
  O  O32  1  0.698  0.080  0.560  1.0
  O  O33  1  0.198  0.920  0.940  1.0
  O  O34  1  0.302  0.920  0.440  1.0
  O  O35  1  0.802  0.080  0.060  1.0
  O  O36  1  0.869  0.556  0.376  1.0
  O  O37  1  0.369  0.444  0.124  1.0
  O  O38  1  0.131  0.444  0.624  1.0
  O  O39  1  0.631  0.556  0.876  1.0
  O  O40  1  0.899  0.012  0.797  1.0
  O  O41  1  0.399  0.988  0.703  1.0
  O  O42  1  0.101  0.988  0.203  1.0
  O  O43  1  0.601  0.012  0.297  1.0
  O  O44  1  0.937  0.488  0.808  1.0
  O  O45  1  0.437  0.512  0.692  1.0
  O  O46  1  0.063  0.512  0.192  1.0
  O  O47  1  0.563  0.488  0.308  1.0
  O  O48  1  0.638  0.938  0.876  1.0
  O  O49  1  0.138  0.062  0.624  1.0
  O  O50  1  0.362  0.062  0.124  1.0
  O  O51  1  0.862  0.938  0.376  1.0
[/CIF]
.
The material structure described by BaZn2(AsO4)2 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form ZnO4 tetrahedra that share  a cornercorner with one As(2)O4 tetrahedra and corners with three equivalent As(1)O4 tetrahedra. In the second Zn site, Zn(2) is bonded to one O(1), one O(4), one O(6), and one O(8) atom to form ZnO4 tetrahedra that share  a cornercorner with one As(1)O4 tetrahedra and corners with three equivalent As(2)O4 tetrahedra. 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  a cornercorner with one Zn(2)O4 tetrahedra and corners with three equivalent Zn(1)O4 tetrahedra. 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  a cornercorner with one Zn(1)O4 tetrahedra and corners with three equivalent Zn(2)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal planar geometry to one Ba(1), one Zn(2), and one As(2) atom. In the second O site, O(5) is bonded in a 3-coordinate geometry to one Ba(1), one Zn(1), and one As(1) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to one Ba(1), one Zn(2), and one As(2) atom. In the fourth O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Zn(1), and one As(1) atom. In the fifth O site, O(8) is bonded in a 3-coordinate geometry to one Ba(1), one Zn(2), and one As(2) atom. In the sixth O site, O(1) is bonded in a distorted trigonal planar geometry to one Ba(1), one Zn(2), and one As(1) atom. In the seventh O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one As(2) atom. In the eighth O site, O(3) is bonded in a distorted trigonal planar geometry to one Ba(1), one Zn(1), and one As(1) atom. is represented by the CIF card [CIF]
data_BaZn2(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.200
_cell_length_b   8.965
_cell_length_c   9.587
_cell_angle_alpha   88.581
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   876.402
_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
  Ba  Ba0  1  0.916  0.251  0.609  1.0
  Ba  Ba1  1  0.416  0.749  0.891  1.0
  Ba  Ba2  1  0.084  0.749  0.391  1.0
  Ba  Ba3  1  0.584  0.251  0.109  1.0
  Zn  Zn4  1  0.686  0.580  0.442  1.0
  Zn  Zn5  1  0.186  0.420  0.058  1.0
  Zn  Zn6  1  0.314  0.420  0.558  1.0
  Zn  Zn7  1  0.814  0.580  0.942  1.0
  Zn  Zn8  1  0.923  0.072  0.217  1.0
  Zn  Zn9  1  0.423  0.928  0.283  1.0
  Zn  Zn10  1  0.077  0.928  0.783  1.0
  Zn  Zn11  1  0.577  0.072  0.717  1.0
  As  As12  1  0.413  0.560  0.258  1.0
  As  As13  1  0.913  0.440  0.242  1.0
  As  As14  1  0.587  0.440  0.742  1.0
  As  As15  1  0.087  0.560  0.758  1.0
  As  As16  1  0.201  0.053  0.068  1.0
  As  As17  1  0.701  0.947  0.432  1.0
  As  As18  1  0.799  0.947  0.932  1.0
  As  As19  1  0.299  0.053  0.568  1.0
  O  O20  1  0.420  0.736  0.183  1.0
  O  O21  1  0.920  0.264  0.317  1.0
  O  O22  1  0.580  0.264  0.817  1.0
  O  O23  1  0.080  0.736  0.683  1.0
  O  O24  1  0.643  0.781  0.497  1.0
  O  O25  1  0.143  0.219  0.003  1.0
  O  O26  1  0.357  0.219  0.503  1.0
  O  O27  1  0.857  0.781  0.997  1.0
  O  O28  1  0.697  0.439  0.607  1.0
  O  O29  1  0.197  0.561  0.893  1.0
  O  O30  1  0.303  0.561  0.393  1.0
  O  O31  1  0.803  0.439  0.107  1.0
  O  O32  1  0.698  0.080  0.560  1.0
  O  O33  1  0.198  0.920  0.940  1.0
  O  O34  1  0.302  0.920  0.440  1.0
  O  O35  1  0.802  0.080  0.060  1.0
  O  O36  1  0.869  0.556  0.376  1.0
  O  O37  1  0.369  0.444  0.124  1.0
  O  O38  1  0.131  0.444  0.624  1.0
  O  O39  1  0.631  0.556  0.876  1.0
  O  O40  1  0.899  0.012  0.797  1.0
  O  O41  1  0.399  0.988  0.703  1.0
  O  O42  1  0.101  0.988  0.203  1.0
  O  O43  1  0.601  0.012  0.297  1.0
  O  O44  1  0.937  0.488  0.808  1.0
  O  O45  1  0.437  0.512  0.692  1.0
  O  O46  1  0.063  0.512  0.192  1.0
  O  O47  1  0.563  0.488  0.308  1.0
  O  O48  1  0.638  0.938  0.876  1.0
  O  O49  1  0.138  0.062  0.624  1.0
  O  O50  1  0.362  0.062  0.124  1.0
  O  O51  1  0.862  0.938  0.376  1.0
[/CIF]
.