The structure described by MgPr(BiO3)2 crystallizes in the orthorhombic Pmn2_1 space group. Mg(1) is bonded to one O(1), one O(4), and two equivalent O(3) atoms to form distorted MgO4 tetrahedra that share corners with eight equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 65-83°. Pr(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), and four equivalent O(3) atoms. Bi(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form BiO6 octahedra that share corners with six equivalent Bi(1)O6 octahedra and corners with four equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-53°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Pr(1), and two equivalent Bi(1) atoms to form distorted corner-sharing OPrMgBi2 trigonal pyramids. In the second O site, O(2) is bonded in a trigonal planar geometry to one Pr(1) and two equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent Pr(1), and two equivalent Bi(1) atoms. In the fourth O site, O(4) is bonded to one Mg(1), one Pr(1), and two equivalent Bi(1) atoms to form distorted corner-sharing OPrMgBi2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_PrMg(BiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.829
_cell_length_b   6.083
_cell_length_c   8.550
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   303.175
_cell_formula_units_Z   2
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
  Pr  Pr0  1  0.011  0.685  0.000  1.0
  Pr  Pr1  1  0.511  0.315  0.500  1.0
  Mg  Mg2  1  0.510  0.248  0.000  1.0
  Mg  Mg3  1  0.010  0.752  0.500  1.0
  Bi  Bi4  1  0.004  0.237  0.749  1.0
  Bi  Bi5  1  0.004  0.237  0.251  1.0
  Bi  Bi6  1  0.504  0.763  0.249  1.0
  Bi  Bi7  1  0.504  0.763  0.751  1.0
  O  O8  1  0.137  0.145  0.500  1.0
  O  O9  1  0.167  0.921  0.816  1.0
  O  O10  1  0.167  0.921  0.184  1.0
  O  O11  1  0.328  0.426  0.169  1.0
  O  O12  1  0.328  0.426  0.831  1.0
  O  O13  1  0.344  0.676  0.500  1.0
  O  O14  1  0.637  0.855  0.000  1.0
  O  O15  1  0.667  0.079  0.684  1.0
  O  O16  1  0.667  0.079  0.316  1.0
  O  O17  1  0.828  0.574  0.669  1.0
  O  O18  1  0.828  0.574  0.331  1.0
  O  O19  1  0.844  0.324  0.000  1.0
[/CIF]
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The structure described by MgPr(BiO3)2 crystallizes in the orthorhombic Pmn2_1 space group. Mg(1) is bonded to one O(1), one O(4), and two equivalent O(3) atoms to form distorted MgO4 tetrahedra that share corners with eight equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 65-83°. Pr(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), and four equivalent O(3) atoms. Bi(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form BiO6 octahedra that share corners with six equivalent Bi(1)O6 octahedra and corners with four equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-53°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Pr(1), and two equivalent Bi(1) atoms to form distorted corner-sharing OPrMgBi2 trigonal pyramids. In the second O site, O(2) is bonded in a trigonal planar geometry to one Pr(1) and two equivalent Bi(1) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent Pr(1), and two equivalent Bi(1) atoms. In the fourth O site, O(4) is bonded to one Mg(1), one Pr(1), and two equivalent Bi(1) atoms to form distorted corner-sharing OPrMgBi2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_PrMg(BiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.829
_cell_length_b   6.083
_cell_length_c   8.550
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   303.175
_cell_formula_units_Z   2
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
  Pr  Pr0  1  0.011  0.685  0.000  1.0
  Pr  Pr1  1  0.511  0.315  0.500  1.0
  Mg  Mg2  1  0.510  0.248  0.000  1.0
  Mg  Mg3  1  0.010  0.752  0.500  1.0
  Bi  Bi4  1  0.004  0.237  0.749  1.0
  Bi  Bi5  1  0.004  0.237  0.251  1.0
  Bi  Bi6  1  0.504  0.763  0.249  1.0
  Bi  Bi7  1  0.504  0.763  0.751  1.0
  O  O8  1  0.137  0.145  0.500  1.0
  O  O9  1  0.167  0.921  0.816  1.0
  O  O10  1  0.167  0.921  0.184  1.0
  O  O11  1  0.328  0.426  0.169  1.0
  O  O12  1  0.328  0.426  0.831  1.0
  O  O13  1  0.344  0.676  0.500  1.0
  O  O14  1  0.637  0.855  0.000  1.0
  O  O15  1  0.667  0.079  0.684  1.0
  O  O16  1  0.667  0.079  0.316  1.0
  O  O17  1  0.828  0.574  0.669  1.0
  O  O18  1  0.828  0.574  0.331  1.0
  O  O19  1  0.844  0.324  0.000  1.0
[/CIF]
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