The compound described by MgPr4(CuO4)2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a distorted square co-planar geometry to four equivalent O(3) atoms. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 7-coordinate geometry to two equivalent O(2), two equivalent O(3), and three equivalent O(1) atoms. In the second Pr site, Pr(2) is bonded in a 7-coordinate geometry to two equivalent O(1), two equivalent O(3), and three equivalent O(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to four equivalent O(3) atoms. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to four equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Pr(2) and three equivalent Pr(1) atoms to form distorted OPr5 trigonal bipyramids that share corners with four equivalent O(1)Pr5 trigonal bipyramids, corners with six equivalent O(3)Pr2MgCu2 trigonal bipyramids, edges with two equivalent O(3)Pr2MgCu2 trigonal bipyramids, edges with two equivalent O(1)Pr5 trigonal bipyramids, and edges with six equivalent O(2)Pr5 trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Pr(1) and three equivalent Pr(2) atoms to form distorted OPr5 trigonal bipyramids that share corners with four equivalent O(2)Pr5 trigonal bipyramids, corners with six equivalent O(3)Pr2MgCu2 trigonal bipyramids, edges with two equivalent O(3)Pr2MgCu2 trigonal bipyramids, edges with two equivalent O(2)Pr5 trigonal bipyramids, and edges with six equivalent O(1)Pr5 trigonal bipyramids. In the third O site, O(3) is bonded to one Mg(1), one Pr(1), one Pr(2), one Cu(1), and one Cu(2) atom to form distorted OPr2MgCu2 trigonal bipyramids that share corners with three equivalent O(1)Pr5 trigonal bipyramids, corners with three equivalent O(2)Pr5 trigonal bipyramids, corners with four equivalent O(3)Pr2MgCu2 trigonal bipyramids,  an edgeedge with one O(1)Pr5 trigonal bipyramid,  an edgeedge with one O(2)Pr5 trigonal bipyramid, edges with two equivalent O(3)Pr2MgCu2 trigonal bipyramids, and  a faceface with one O(3)Pr2MgCu2 trigonal bipyramid. is represented by the CIF card [CIF]
data_Pr4Mg(CuO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.427
_cell_length_b   4.775
_cell_length_c   9.073
_cell_angle_alpha   88.831
_cell_angle_beta   107.403
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   224.284
_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  0.346  0.967  0.692  1.0
  Pr  Pr1  1  0.654  0.033  0.308  1.0
  Pr  Pr2  1  0.174  0.476  0.348  1.0
  Pr  Pr3  1  0.826  0.524  0.652  1.0
  Mg  Mg4  1  0.000  0.500  0.000  1.0
  Cu  Cu5  1  0.000  0.000  0.000  1.0
  Cu  Cu6  1  0.500  0.500  0.000  1.0
  O  O7  1  0.202  0.972  0.405  1.0
  O  O8  1  0.798  0.028  0.595  1.0
  O  O9  1  0.309  0.468  0.617  1.0
  O  O10  1  0.691  0.532  0.383  1.0
  O  O11  1  0.301  0.277  0.125  1.0
  O  O12  1  0.176  0.723  0.875  1.0
  O  O13  1  0.824  0.277  0.125  1.0
  O  O14  1  0.699  0.723  0.875  1.0
[/CIF]
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The compound described by MgPr4(CuO4)2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a distorted square co-planar geometry to four equivalent O(3) atoms. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 7-coordinate geometry to two equivalent O(2), two equivalent O(3), and three equivalent O(1) atoms. In the second Pr site, Pr(2) is bonded in a 7-coordinate geometry to two equivalent O(1), two equivalent O(3), and three equivalent O(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to four equivalent O(3) atoms. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to four equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Pr(2) and three equivalent Pr(1) atoms to form distorted OPr5 trigonal bipyramids that share corners with four equivalent O(1)Pr5 trigonal bipyramids, corners with six equivalent O(3)Pr2MgCu2 trigonal bipyramids, edges with two equivalent O(3)Pr2MgCu2 trigonal bipyramids, edges with two equivalent O(1)Pr5 trigonal bipyramids, and edges with six equivalent O(2)Pr5 trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Pr(1) and three equivalent Pr(2) atoms to form distorted OPr5 trigonal bipyramids that share corners with four equivalent O(2)Pr5 trigonal bipyramids, corners with six equivalent O(3)Pr2MgCu2 trigonal bipyramids, edges with two equivalent O(3)Pr2MgCu2 trigonal bipyramids, edges with two equivalent O(2)Pr5 trigonal bipyramids, and edges with six equivalent O(1)Pr5 trigonal bipyramids. In the third O site, O(3) is bonded to one Mg(1), one Pr(1), one Pr(2), one Cu(1), and one Cu(2) atom to form distorted OPr2MgCu2 trigonal bipyramids that share corners with three equivalent O(1)Pr5 trigonal bipyramids, corners with three equivalent O(2)Pr5 trigonal bipyramids, corners with four equivalent O(3)Pr2MgCu2 trigonal bipyramids,  an edgeedge with one O(1)Pr5 trigonal bipyramid,  an edgeedge with one O(2)Pr5 trigonal bipyramid, edges with two equivalent O(3)Pr2MgCu2 trigonal bipyramids, and  a faceface with one O(3)Pr2MgCu2 trigonal bipyramid. is represented by the CIF card [CIF]
data_Pr4Mg(CuO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.427
_cell_length_b   4.775
_cell_length_c   9.073
_cell_angle_alpha   88.831
_cell_angle_beta   107.403
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   224.284
_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  0.346  0.967  0.692  1.0
  Pr  Pr1  1  0.654  0.033  0.308  1.0
  Pr  Pr2  1  0.174  0.476  0.348  1.0
  Pr  Pr3  1  0.826  0.524  0.652  1.0
  Mg  Mg4  1  0.000  0.500  0.000  1.0
  Cu  Cu5  1  0.000  0.000  0.000  1.0
  Cu  Cu6  1  0.500  0.500  0.000  1.0
  O  O7  1  0.202  0.972  0.405  1.0
  O  O8  1  0.798  0.028  0.595  1.0
  O  O9  1  0.309  0.468  0.617  1.0
  O  O10  1  0.691  0.532  0.383  1.0
  O  O11  1  0.301  0.277  0.125  1.0
  O  O12  1  0.176  0.723  0.875  1.0
  O  O13  1  0.824  0.277  0.125  1.0
  O  O14  1  0.699  0.723  0.875  1.0
[/CIF]
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