Pr2O3 is Corundum-like structured and crystallizes in the cubic Ia-3 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to six equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing PrO6 octahedra. The corner-sharing octahedral tilt angles range from 55-57°. In the second Pr site, Pr(2) is bonded to six equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing PrO6 octahedra. The corner-sharing octahedral tilt angles are 57°. O(1) is bonded to one Pr(2) and three equivalent Pr(1) atoms to form a mixture of corner and edge-sharing OPr4 trigonal pyramids.
Pr2O3 is Corundum-like structured and crystallizes in the cubic Ia-3 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to six equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing PrO6 octahedra. The corner-sharing octahedral tilt angles range from 55-57°. There are a spread of Pr(1)-O(1) bond distances ranging from 2.38-2.48 Å. In the second Pr site, Pr(2) is bonded to six equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing PrO6 octahedra. The corner-sharing octahedral tilt angles are 57°. All Pr(2)-O(1) bond lengths are 2.42 Å. O(1) is bonded to one Pr(2) and three equivalent Pr(1) atoms to form a mixture of corner and edge-sharing OPr4 trigonal pyramids.