SrCaPrSbO6 crystallizes in the tetragonal P42_12 space group. Sr(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(2) and four equivalent O(3) atoms. Ca(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(3) atoms. Pr(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form PrO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-34°. Sb(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form SbO6 octahedra that share corners with six equivalent Pr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-34°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to four equivalent Ca(1), one Pr(1), and one Sb(1) atom. In the second O site, O(2) is bonded to four equivalent Sr(1), one Pr(1), and one Sb(1) atom to form distorted OSr4PrSb octahedra that share corners with four equivalent O(2)Sr4PrSb octahedra, corners with eight equivalent O(3)SrCaPrSb tetrahedra, edges with four equivalent O(2)Sr4PrSb octahedra, and edges with eight equivalent O(3)SrCaPrSb tetrahedra. The corner-sharing octahedral tilt angles are 7°. In the third O site, O(3) is bonded to one Sr(1), one Ca(1), one Pr(1), and one Sb(1) atom to form distorted OSrCaPrSb tetrahedra that share corners with two equivalent O(2)Sr4PrSb octahedra, corners with ten equivalent O(3)SrCaPrSb tetrahedra, edges with two equivalent O(2)Sr4PrSb octahedra, and  an edgeedge with one O(3)SrCaPrSb tetrahedra. The corner-sharing octahedral tilt angles are 67°.
SrCaPrSbO6 crystallizes in the tetragonal P42_12 space group. Sr(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(2) and four equivalent O(3) atoms. All Sr(1)-O(2) bond lengths are 2.97 Å. All Sr(1)-O(3) bond lengths are 2.65 Å. Ca(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(3) atoms. All Ca(1)-O(1) bond lengths are 2.96 Å. All Ca(1)-O(3) bond lengths are 2.55 Å. Pr(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form PrO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-34°. The Pr(1)-O(1) bond length is 2.26 Å. The Pr(1)-O(2) bond length is 2.34 Å. All Pr(1)-O(3) bond lengths are 2.37 Å. Sb(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form SbO6 octahedra that share corners with six equivalent Pr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-34°. The Sb(1)-O(1) bond length is 1.98 Å. The Sb(1)-O(2) bond length is 2.02 Å. All Sb(1)-O(3) bond lengths are 2.02 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to four equivalent Ca(1), one Pr(1), and one Sb(1) atom. In the second O site, O(2) is bonded to four equivalent Sr(1), one Pr(1), and one Sb(1) atom to form distorted OSr4PrSb octahedra that share corners with four equivalent O(2)Sr4PrSb octahedra, corners with eight equivalent O(3)SrCaPrSb tetrahedra, edges with four equivalent O(2)Sr4PrSb octahedra, and edges with eight equivalent O(3)SrCaPrSb tetrahedra. The corner-sharing octahedral tilt angles are 7°. In the third O site, O(3) is bonded to one Sr(1), one Ca(1), one Pr(1), and one Sb(1) atom to form distorted OSrCaPrSb tetrahedra that share corners with two equivalent O(2)Sr4PrSb octahedra, corners with ten equivalent O(3)SrCaPrSb tetrahedra, edges with two equivalent O(2)Sr4PrSb octahedra, and  an edgeedge with one O(3)SrCaPrSb tetrahedra. The corner-sharing octahedral tilt angles are 67°.