The structure described by BiZn2PO6 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form ZnO5 trigonal bipyramids that share corners with three equivalent P(1)O4 tetrahedra, corners with two equivalent Zn(2)O5 trigonal bipyramids, and  an edgeedge with one Zn(2)O5 trigonal bipyramid. In the second Zn site, Zn(2) is bonded to one O(4), two equivalent O(1), and two equivalent O(2) atoms to form distorted ZnO5 trigonal bipyramids that share corners with three equivalent P(1)O4 tetrahedra, corners with two equivalent Zn(1)O5 trigonal bipyramids, and  an edgeedge with one Zn(1)O5 trigonal bipyramid. Bi(1) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. P(1) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with three equivalent Zn(1)O5 trigonal bipyramids and corners with three equivalent Zn(2)O5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Zn(1), one Zn(2), and two equivalent Bi(1) atoms to form a mixture of corner and edge-sharing OZn2Bi2 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one P(1) atom. In the third O site, O(3) is bonded in a linear geometry to one Zn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Zn(2) and one P(1) atom. is represented by the CIF file [CIF]
data_Zn2BiPO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.340
_cell_length_b   7.922
_cell_length_c   12.144
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   513.815
_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  0.250  0.701  0.908  1.0
  Zn  Zn1  1  0.750  0.201  0.592  1.0
  Zn  Zn2  1  0.750  0.805  0.604  1.0
  Zn  Zn3  1  0.750  0.299  0.092  1.0
  Zn  Zn4  1  0.250  0.799  0.408  1.0
  Zn  Zn5  1  0.250  0.195  0.396  1.0
  Zn  Zn6  1  0.750  0.695  0.104  1.0
  Zn  Zn7  1  0.250  0.305  0.896  1.0
  Bi  Bi8  1  0.750  0.984  0.902  1.0
  Bi  Bi9  1  0.750  0.516  0.402  1.0
  Bi  Bi10  1  0.250  0.484  0.598  1.0
  Bi  Bi11  1  0.250  0.016  0.098  1.0
  P  P12  1  0.750  0.975  0.301  1.0
  P  P13  1  0.250  0.025  0.699  1.0
  P  P14  1  0.750  0.525  0.801  1.0
  P  P15  1  0.250  0.475  0.199  1.0
  O  O16  1  0.002  0.327  0.493  1.0
  O  O17  1  0.993  0.994  0.373  1.0
  O  O18  1  0.498  0.173  0.993  1.0
  O  O19  1  0.250  0.607  0.292  1.0
  O  O20  1  0.007  0.006  0.627  1.0
  O  O21  1  0.993  0.506  0.873  1.0
  O  O22  1  0.007  0.494  0.127  1.0
  O  O23  1  0.250  0.292  0.244  1.0
  O  O24  1  0.750  0.393  0.708  1.0
  O  O25  1  0.493  0.006  0.627  1.0
  O  O26  1  0.002  0.173  0.993  1.0
  O  O27  1  0.998  0.827  0.007  1.0
  O  O28  1  0.493  0.494  0.127  1.0
  O  O29  1  0.507  0.506  0.873  1.0
  O  O30  1  0.250  0.208  0.744  1.0
  O  O31  1  0.498  0.327  0.493  1.0
  O  O32  1  0.502  0.827  0.007  1.0
  O  O33  1  0.502  0.673  0.507  1.0
  O  O34  1  0.998  0.673  0.507  1.0
  O  O35  1  0.750  0.107  0.208  1.0
  O  O36  1  0.750  0.792  0.256  1.0
  O  O37  1  0.507  0.994  0.373  1.0
  O  O38  1  0.250  0.893  0.792  1.0
  O  O39  1  0.750  0.708  0.756  1.0
[/CIF]
.
The structure described by BiZn2PO6 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form ZnO5 trigonal bipyramids that share corners with three equivalent P(1)O4 tetrahedra, corners with two equivalent Zn(2)O5 trigonal bipyramids, and  an edgeedge with one Zn(2)O5 trigonal bipyramid. In the second Zn site, Zn(2) is bonded to one O(4), two equivalent O(1), and two equivalent O(2) atoms to form distorted ZnO5 trigonal bipyramids that share corners with three equivalent P(1)O4 tetrahedra, corners with two equivalent Zn(1)O5 trigonal bipyramids, and  an edgeedge with one Zn(1)O5 trigonal bipyramid. Bi(1) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. P(1) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with three equivalent Zn(1)O5 trigonal bipyramids and corners with three equivalent Zn(2)O5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Zn(1), one Zn(2), and two equivalent Bi(1) atoms to form a mixture of corner and edge-sharing OZn2Bi2 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one P(1) atom. In the third O site, O(3) is bonded in a linear geometry to one Zn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Zn(2) and one P(1) atom. is represented by the CIF file [CIF]
data_Zn2BiPO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.340
_cell_length_b   7.922
_cell_length_c   12.144
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   513.815
_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  0.250  0.701  0.908  1.0
  Zn  Zn1  1  0.750  0.201  0.592  1.0
  Zn  Zn2  1  0.750  0.805  0.604  1.0
  Zn  Zn3  1  0.750  0.299  0.092  1.0
  Zn  Zn4  1  0.250  0.799  0.408  1.0
  Zn  Zn5  1  0.250  0.195  0.396  1.0
  Zn  Zn6  1  0.750  0.695  0.104  1.0
  Zn  Zn7  1  0.250  0.305  0.896  1.0
  Bi  Bi8  1  0.750  0.984  0.902  1.0
  Bi  Bi9  1  0.750  0.516  0.402  1.0
  Bi  Bi10  1  0.250  0.484  0.598  1.0
  Bi  Bi11  1  0.250  0.016  0.098  1.0
  P  P12  1  0.750  0.975  0.301  1.0
  P  P13  1  0.250  0.025  0.699  1.0
  P  P14  1  0.750  0.525  0.801  1.0
  P  P15  1  0.250  0.475  0.199  1.0
  O  O16  1  0.002  0.327  0.493  1.0
  O  O17  1  0.993  0.994  0.373  1.0
  O  O18  1  0.498  0.173  0.993  1.0
  O  O19  1  0.250  0.607  0.292  1.0
  O  O20  1  0.007  0.006  0.627  1.0
  O  O21  1  0.993  0.506  0.873  1.0
  O  O22  1  0.007  0.494  0.127  1.0
  O  O23  1  0.250  0.292  0.244  1.0
  O  O24  1  0.750  0.393  0.708  1.0
  O  O25  1  0.493  0.006  0.627  1.0
  O  O26  1  0.002  0.173  0.993  1.0
  O  O27  1  0.998  0.827  0.007  1.0
  O  O28  1  0.493  0.494  0.127  1.0
  O  O29  1  0.507  0.506  0.873  1.0
  O  O30  1  0.250  0.208  0.744  1.0
  O  O31  1  0.498  0.327  0.493  1.0
  O  O32  1  0.502  0.827  0.007  1.0
  O  O33  1  0.502  0.673  0.507  1.0
  O  O34  1  0.998  0.673  0.507  1.0
  O  O35  1  0.750  0.107  0.208  1.0
  O  O36  1  0.750  0.792  0.256  1.0
  O  O37  1  0.507  0.994  0.373  1.0
  O  O38  1  0.250  0.893  0.792  1.0
  O  O39  1  0.750  0.708  0.756  1.0
[/CIF]
.