SrPr2O4 crystallizes in the orthorhombic Pnma space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to one O(4), two equivalent O(2), and three equivalent O(3) atoms to form edge-sharing PrO6 octahedra. In the second Pr site, Pr(2) is bonded in a 6-coordinate geometry to one O(2), two equivalent O(4), and three equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1) and three equivalent Pr(2) atoms to form a mixture of distorted edge and corner-sharing OSr2Pr3 trigonal bipyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Pr(2), and two equivalent Pr(1) atoms. In the third O site, O(3) is bonded to two equivalent Sr(1) and three equivalent Pr(1) atoms to form a mixture of distorted edge and corner-sharing OSr2Pr3 square pyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Sr(1), one Pr(1), and two equivalent Pr(2) atoms.
SrPr2O4 crystallizes in the orthorhombic Pnma space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Sr(1)-O(1) bond lengths are 2.73 Å. There is one shorter (2.68 Å) and one longer (3.20 Å) Sr(1)-O(2) bond length. Both Sr(1)-O(3) bond lengths are 2.69 Å. Both Sr(1)-O(4) bond lengths are 2.78 Å. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to one O(4), two equivalent O(2), and three equivalent O(3) atoms to form edge-sharing PrO6 octahedra. The Pr(1)-O(4) bond length is 2.37 Å. Both Pr(1)-O(2) bond lengths are 2.31 Å. There is one shorter (2.50 Å) and two longer (2.54 Å) Pr(1)-O(3) bond lengths. In the second Pr site, Pr(2) is bonded in a 6-coordinate geometry to one O(2), two equivalent O(4), and three equivalent O(1) atoms. The Pr(2)-O(2) bond length is 2.38 Å. Both Pr(2)-O(4) bond lengths are 2.45 Å. There is one shorter (2.41 Å) and two longer (2.48 Å) Pr(2)-O(1) bond lengths. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1) and three equivalent Pr(2) atoms to form a mixture of distorted edge and corner-sharing OSr2Pr3 trigonal bipyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Pr(2), and two equivalent Pr(1) atoms. In the third O site, O(3) is bonded to two equivalent Sr(1) and three equivalent Pr(1) atoms to form a mixture of distorted edge and corner-sharing OSr2Pr3 square pyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Sr(1), one Pr(1), and two equivalent Pr(2) atoms.