The material structure described by MgPr2(NiO3)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. In the second Pr site, Pr(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. In the second Ni site, Ni(2) is bonded in a distorted trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Pr(1), one Pr(2), one Ni(1), and one Ni(2) atom to form distorted OPr2Ni2 trigonal pyramids that share  a cornercorner with one O(4)Pr2MgNi trigonal pyramid, corners with two equivalent O(2)Pr2Ni2 trigonal pyramids, corners with two equivalent O(3)Pr2Ni2 trigonal pyramids, corners with three equivalent O(5)Pr2MgNi trigonal pyramids, corners with three equivalent O(6)Pr2MgNi trigonal pyramids,  an edgeedge with one O(4)Pr2MgNi trigonal pyramid,  an edgeedge with one O(2)Pr2Ni2 trigonal pyramid, and  an edgeedge with one O(3)Pr2Ni2 trigonal pyramid. In the second O site, O(2) is bonded to one Pr(1), one Pr(2), one Ni(1), and one Ni(2) atom to form distorted OPr2Ni2 trigonal pyramids that share  a cornercorner with one O(6)Pr2MgNi trigonal pyramid, corners with two equivalent O(1)Pr2Ni2 trigonal pyramids, corners with two equivalent O(3)Pr2Ni2 trigonal pyramids, corners with three equivalent O(4)Pr2MgNi trigonal pyramids, corners with three equivalent O(5)Pr2MgNi trigonal pyramids,  an edgeedge with one O(6)Pr2MgNi trigonal pyramid,  an edgeedge with one O(1)Pr2Ni2 trigonal pyramid, and  an edgeedge with one O(3)Pr2Ni2 trigonal pyramid. In the third O site, O(3) is bonded to one Pr(1), one Pr(2), one Ni(1), and one Ni(2) atom to form distorted OPr2Ni2 trigonal pyramids that share  a cornercorner with one O(5)Pr2MgNi trigonal pyramid, corners with two equivalent O(1)Pr2Ni2 trigonal pyramids, corners with two equivalent O(2)Pr2Ni2 trigonal pyramids, corners with three equivalent O(4)Pr2MgNi trigonal pyramids, corners with three equivalent O(6)Pr2MgNi trigonal pyramids,  an edgeedge with one O(5)Pr2MgNi trigonal pyramid,  an edgeedge with one O(1)Pr2Ni2 trigonal pyramid, and  an edgeedge with one O(2)Pr2Ni2 trigonal pyramid. In the fourth O site, O(4) is bonded to one Mg(1), one Pr(1), one Pr(2), and one Ni(1) atom to form distorted OPr2MgNi trigonal pyramids that share  a cornercorner with one O(1)Pr2Ni2 trigonal pyramid, corners with two equivalent O(5)Pr2MgNi trigonal pyramids, corners with two equivalent O(6)Pr2MgNi trigonal pyramids, corners with three equivalent O(2)Pr2Ni2 trigonal pyramids, corners with three equivalent O(3)Pr2Ni2 trigonal pyramids,  an edgeedge with one O(5)Pr2MgNi trigonal pyramid,  an edgeedge with one O(6)Pr2MgNi trigonal pyramid, and  an edgeedge with one O(1)Pr2Ni2 trigonal pyramid. In the fifth O site, O(5) is bonded to one Mg(1), one Pr(1), one Pr(2), and one Ni(1) atom to form distorted OPr2MgNi trigonal pyramids that share  a cornercorner with one O(3)Pr2Ni2 trigonal pyramid, corners with two equivalent O(4)Pr2MgNi trigonal pyramids, corners with two equivalent O(6)Pr2MgNi trigonal pyramids, corners with three equivalent O(1)Pr2Ni2 trigonal pyramids, corners with three equivalent O(2)Pr2Ni2 trigonal pyramids,  an edgeedge with one O(4)Pr2MgNi trigonal pyramid,  an edgeedge with one O(6)Pr2MgNi trigonal pyramid, and  an edgeedge with one O(3)Pr2Ni2 trigonal pyramid. In the sixth O site, O(6) is bonded to one Mg(1), one Pr(1), one Pr(2), and one Ni(1) atom to form distorted OPr2MgNi trigonal pyramids that share  a cornercorner with one O(2)Pr2Ni2 trigonal pyramid, corners with two equivalent O(4)Pr2MgNi trigonal pyramids, corners with two equivalent O(5)Pr2MgNi trigonal pyramids, corners with three equivalent O(1)Pr2Ni2 trigonal pyramids, corners with three equivalent O(3)Pr2Ni2 trigonal pyramids,  an edgeedge with one O(4)Pr2MgNi trigonal pyramid,  an edgeedge with one O(5)Pr2MgNi trigonal pyramid, and  an edgeedge with one O(2)Pr2Ni2 trigonal pyramid. is represented by the CIF card [CIF]
data_Pr2Mg(NiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.234
_cell_length_b   6.294
_cell_length_c   6.253
_cell_angle_alpha   54.943
_cell_angle_beta   55.196
_cell_angle_gamma   54.869
_symmetry_Int_Tables_number   1
_cell_volume   153.309
_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
  Pr  Pr0  1  0.689  0.686  0.689  1.0
  Pr  Pr1  1  0.285  0.285  0.284  1.0
  Mg  Mg2  1  0.913  0.916  0.914  1.0
  Ni  Ni3  1  0.489  0.489  0.488  1.0
  Ni  Ni4  1  0.092  0.085  0.088  1.0
  O  O5  1  0.134  0.715  0.348  1.0
  O  O6  1  0.719  0.346  0.133  1.0
  O  O7  1  0.353  0.131  0.717  1.0
  O  O8  1  0.841  0.269  0.608  1.0
  O  O9  1  0.606  0.843  0.265  1.0
  O  O10  1  0.266  0.610  0.840  1.0
[/CIF]
.
The material structure described by MgPr2(NiO3)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. In the second Pr site, Pr(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. In the second Ni site, Ni(2) is bonded in a distorted trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Pr(1), one Pr(2), one Ni(1), and one Ni(2) atom to form distorted OPr2Ni2 trigonal pyramids that share  a cornercorner with one O(4)Pr2MgNi trigonal pyramid, corners with two equivalent O(2)Pr2Ni2 trigonal pyramids, corners with two equivalent O(3)Pr2Ni2 trigonal pyramids, corners with three equivalent O(5)Pr2MgNi trigonal pyramids, corners with three equivalent O(6)Pr2MgNi trigonal pyramids,  an edgeedge with one O(4)Pr2MgNi trigonal pyramid,  an edgeedge with one O(2)Pr2Ni2 trigonal pyramid, and  an edgeedge with one O(3)Pr2Ni2 trigonal pyramid. In the second O site, O(2) is bonded to one Pr(1), one Pr(2), one Ni(1), and one Ni(2) atom to form distorted OPr2Ni2 trigonal pyramids that share  a cornercorner with one O(6)Pr2MgNi trigonal pyramid, corners with two equivalent O(1)Pr2Ni2 trigonal pyramids, corners with two equivalent O(3)Pr2Ni2 trigonal pyramids, corners with three equivalent O(4)Pr2MgNi trigonal pyramids, corners with three equivalent O(5)Pr2MgNi trigonal pyramids,  an edgeedge with one O(6)Pr2MgNi trigonal pyramid,  an edgeedge with one O(1)Pr2Ni2 trigonal pyramid, and  an edgeedge with one O(3)Pr2Ni2 trigonal pyramid. In the third O site, O(3) is bonded to one Pr(1), one Pr(2), one Ni(1), and one Ni(2) atom to form distorted OPr2Ni2 trigonal pyramids that share  a cornercorner with one O(5)Pr2MgNi trigonal pyramid, corners with two equivalent O(1)Pr2Ni2 trigonal pyramids, corners with two equivalent O(2)Pr2Ni2 trigonal pyramids, corners with three equivalent O(4)Pr2MgNi trigonal pyramids, corners with three equivalent O(6)Pr2MgNi trigonal pyramids,  an edgeedge with one O(5)Pr2MgNi trigonal pyramid,  an edgeedge with one O(1)Pr2Ni2 trigonal pyramid, and  an edgeedge with one O(2)Pr2Ni2 trigonal pyramid. In the fourth O site, O(4) is bonded to one Mg(1), one Pr(1), one Pr(2), and one Ni(1) atom to form distorted OPr2MgNi trigonal pyramids that share  a cornercorner with one O(1)Pr2Ni2 trigonal pyramid, corners with two equivalent O(5)Pr2MgNi trigonal pyramids, corners with two equivalent O(6)Pr2MgNi trigonal pyramids, corners with three equivalent O(2)Pr2Ni2 trigonal pyramids, corners with three equivalent O(3)Pr2Ni2 trigonal pyramids,  an edgeedge with one O(5)Pr2MgNi trigonal pyramid,  an edgeedge with one O(6)Pr2MgNi trigonal pyramid, and  an edgeedge with one O(1)Pr2Ni2 trigonal pyramid. In the fifth O site, O(5) is bonded to one Mg(1), one Pr(1), one Pr(2), and one Ni(1) atom to form distorted OPr2MgNi trigonal pyramids that share  a cornercorner with one O(3)Pr2Ni2 trigonal pyramid, corners with two equivalent O(4)Pr2MgNi trigonal pyramids, corners with two equivalent O(6)Pr2MgNi trigonal pyramids, corners with three equivalent O(1)Pr2Ni2 trigonal pyramids, corners with three equivalent O(2)Pr2Ni2 trigonal pyramids,  an edgeedge with one O(4)Pr2MgNi trigonal pyramid,  an edgeedge with one O(6)Pr2MgNi trigonal pyramid, and  an edgeedge with one O(3)Pr2Ni2 trigonal pyramid. In the sixth O site, O(6) is bonded to one Mg(1), one Pr(1), one Pr(2), and one Ni(1) atom to form distorted OPr2MgNi trigonal pyramids that share  a cornercorner with one O(2)Pr2Ni2 trigonal pyramid, corners with two equivalent O(4)Pr2MgNi trigonal pyramids, corners with two equivalent O(5)Pr2MgNi trigonal pyramids, corners with three equivalent O(1)Pr2Ni2 trigonal pyramids, corners with three equivalent O(3)Pr2Ni2 trigonal pyramids,  an edgeedge with one O(4)Pr2MgNi trigonal pyramid,  an edgeedge with one O(5)Pr2MgNi trigonal pyramid, and  an edgeedge with one O(2)Pr2Ni2 trigonal pyramid. is represented by the CIF card [CIF]
data_Pr2Mg(NiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.234
_cell_length_b   6.294
_cell_length_c   6.253
_cell_angle_alpha   54.943
_cell_angle_beta   55.196
_cell_angle_gamma   54.869
_symmetry_Int_Tables_number   1
_cell_volume   153.309
_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
  Pr  Pr0  1  0.689  0.686  0.689  1.0
  Pr  Pr1  1  0.285  0.285  0.284  1.0
  Mg  Mg2  1  0.913  0.916  0.914  1.0
  Ni  Ni3  1  0.489  0.489  0.488  1.0
  Ni  Ni4  1  0.092  0.085  0.088  1.0
  O  O5  1  0.134  0.715  0.348  1.0
  O  O6  1  0.719  0.346  0.133  1.0
  O  O7  1  0.353  0.131  0.717  1.0
  O  O8  1  0.841  0.269  0.608  1.0
  O  O9  1  0.606  0.843  0.265  1.0
  O  O10  1  0.266  0.610  0.840  1.0
[/CIF]
.