Sr15Pd5O24 crystallizes in the trigonal R32 space group. There are five inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(4) atoms. In the third Sr site, Sr(3) 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. In the fourth Sr site, Sr(4) is bonded in a 6-coordinate geometry to six equivalent O(2) atoms. In the fifth Sr site, Sr(5) is bonded in a 6-coordinate geometry to three equivalent O(3) and three equivalent O(4) atoms. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in an octahedral geometry to three equivalent O(1) and three equivalent O(3) atoms. In the second Pd site, Pd(2) is bonded in an octahedral geometry to three equivalent O(2) and three equivalent O(4) atoms. In the third Pd site, Pd(3) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(3) is bonded to one Sr(5), two equivalent Sr(1), two equivalent Sr(3), and one Pd(1) atom to form distorted OSr5Pd octahedra that share corners with three equivalent O(1)Sr4Pd2 octahedra, corners with three equivalent O(3)Sr5Pd octahedra, corners with four equivalent O(2)Sr5Pd octahedra, corners with five equivalent O(4)Sr5Pd octahedra,  an edgeedge with one O(1)Sr4Pd2 octahedra,  an edgeedge with one O(4)Sr5Pd octahedra, edges with two equivalent O(2)Sr5Pd octahedra, faces with two equivalent O(1)Sr4Pd2 octahedra, and faces with three equivalent O(3)Sr5Pd octahedra. The corner-sharing octahedral tilt angles range from 2-66°. In the second O site, O(4) is bonded to one Sr(5), two equivalent Sr(2), two equivalent Sr(3), and one Pd(2) atom to form distorted OSr5Pd octahedra that share corners with three equivalent O(2)Sr5Pd octahedra, corners with three equivalent O(4)Sr5Pd octahedra, corners with four equivalent O(1)Sr4Pd2 octahedra, corners with five equivalent O(3)Sr5Pd octahedra,  an edgeedge with one O(2)Sr5Pd octahedra,  an edgeedge with one O(3)Sr5Pd octahedra, edges with two equivalent O(1)Sr4Pd2 octahedra, faces with two equivalent O(2)Sr5Pd octahedra, and faces with three equivalent O(4)Sr5Pd octahedra. The corner-sharing octahedral tilt angles range from 1-64°. In the third O site, O(1) is bonded to one Sr(1), one Sr(2), two equivalent Sr(3), one Pd(1), and one Pd(3) atom to form distorted OSr4Pd2 octahedra that share corners with three equivalent O(1)Sr4Pd2 octahedra, corners with three equivalent O(3)Sr5Pd octahedra, corners with four equivalent O(4)Sr5Pd octahedra, corners with five equivalent O(2)Sr5Pd octahedra,  an edgeedge with one O(1)Sr4Pd2 octahedra,  an edgeedge with one O(3)Sr5Pd octahedra, edges with two equivalent O(4)Sr5Pd octahedra,  a faceface with one O(2)Sr5Pd octahedra, faces with two equivalent O(1)Sr4Pd2 octahedra, and faces with two equivalent O(3)Sr5Pd octahedra. The corner-sharing octahedral tilt angles range from 2-63°. In the fourth O site, O(2) is bonded to one Sr(1), one Sr(2), one Sr(4), two equivalent Sr(3), and one Pd(2) atom to form distorted OSr5Pd octahedra that share corners with three equivalent O(2)Sr5Pd octahedra, corners with three equivalent O(4)Sr5Pd octahedra, corners with four equivalent O(3)Sr5Pd octahedra, corners with five equivalent O(1)Sr4Pd2 octahedra,  an edgeedge with one O(2)Sr5Pd octahedra,  an edgeedge with one O(4)Sr5Pd octahedra, edges with two equivalent O(3)Sr5Pd octahedra,  a faceface with one O(1)Sr4Pd2 octahedra, faces with two equivalent O(2)Sr5Pd octahedra, and faces with two equivalent O(4)Sr5Pd octahedra. The corner-sharing octahedral tilt angles range from 1-66°.
Sr15Pd5O24 crystallizes in the trigonal R32 space group. There are five inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Both Sr(1)-O(1) bond lengths are 2.71 Å. Both Sr(1)-O(2) bond lengths are 2.61 Å. There are two shorter (2.64 Å) and two longer (2.79 Å) Sr(1)-O(3) bond lengths. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(4) atoms. Both Sr(2)-O(1) bond lengths are 2.59 Å. Both Sr(2)-O(2) bond lengths are 2.63 Å. There are two shorter (2.64 Å) and two longer (2.85 Å) Sr(2)-O(4) bond lengths. In the third Sr site, Sr(3) 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 is one shorter (2.61 Å) and one longer (2.77 Å) Sr(3)-O(1) bond length. There is one shorter (2.69 Å) and one longer (2.78 Å) Sr(3)-O(2) bond length. There is one shorter (2.64 Å) and one longer (2.69 Å) Sr(3)-O(3) bond length. There is one shorter (2.59 Å) and one longer (2.61 Å) Sr(3)-O(4) bond length. In the fourth Sr site, Sr(4) is bonded in a 6-coordinate geometry to six equivalent O(2) atoms. All Sr(4)-O(2) bond lengths are 2.49 Å. In the fifth Sr site, Sr(5) is bonded in a 6-coordinate geometry to three equivalent O(3) and three equivalent O(4) atoms. All Sr(5)-O(3) bond lengths are 2.48 Å. All Sr(5)-O(4) bond lengths are 2.47 Å. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in an octahedral geometry to three equivalent O(1) and three equivalent O(3) atoms. All Pd(1)-O(1) bond lengths are 2.06 Å. All Pd(1)-O(3) bond lengths are 2.09 Å. In the second Pd site, Pd(2) is bonded in an octahedral geometry to three equivalent O(2) and three equivalent O(4) atoms. All Pd(2)-O(2) bond lengths are 2.10 Å. All Pd(2)-O(4) bond lengths are 2.08 Å. In the third Pd site, Pd(3) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. All Pd(3)-O(1) bond lengths are 2.38 Å. There are four inequivalent O sites. In the first O site, O(3) is bonded to one Sr(5), two equivalent Sr(1), two equivalent Sr(3), and one Pd(1) atom to form distorted OSr5Pd octahedra that share corners with three equivalent O(1)Sr4Pd2 octahedra, corners with three equivalent O(3)Sr5Pd octahedra, corners with four equivalent O(2)Sr5Pd octahedra, corners with five equivalent O(4)Sr5Pd octahedra,  an edgeedge with one O(1)Sr4Pd2 octahedra,  an edgeedge with one O(4)Sr5Pd octahedra, edges with two equivalent O(2)Sr5Pd octahedra, faces with two equivalent O(1)Sr4Pd2 octahedra, and faces with three equivalent O(3)Sr5Pd octahedra. The corner-sharing octahedral tilt angles range from 2-66°. In the second O site, O(4) is bonded to one Sr(5), two equivalent Sr(2), two equivalent Sr(3), and one Pd(2) atom to form distorted OSr5Pd octahedra that share corners with three equivalent O(2)Sr5Pd octahedra, corners with three equivalent O(4)Sr5Pd octahedra, corners with four equivalent O(1)Sr4Pd2 octahedra, corners with five equivalent O(3)Sr5Pd octahedra,  an edgeedge with one O(2)Sr5Pd octahedra,  an edgeedge with one O(3)Sr5Pd octahedra, edges with two equivalent O(1)Sr4Pd2 octahedra, faces with two equivalent O(2)Sr5Pd octahedra, and faces with three equivalent O(4)Sr5Pd octahedra. The corner-sharing octahedral tilt angles range from 1-64°. In the third O site, O(1) is bonded to one Sr(1), one Sr(2), two equivalent Sr(3), one Pd(1), and one Pd(3) atom to form distorted OSr4Pd2 octahedra that share corners with three equivalent O(1)Sr4Pd2 octahedra, corners with three equivalent O(3)Sr5Pd octahedra, corners with four equivalent O(4)Sr5Pd octahedra, corners with five equivalent O(2)Sr5Pd octahedra,  an edgeedge with one O(1)Sr4Pd2 octahedra,  an edgeedge with one O(3)Sr5Pd octahedra, edges with two equivalent O(4)Sr5Pd octahedra,  a faceface with one O(2)Sr5Pd octahedra, faces with two equivalent O(1)Sr4Pd2 octahedra, and faces with two equivalent O(3)Sr5Pd octahedra. The corner-sharing octahedral tilt angles range from 2-63°. In the fourth O site, O(2) is bonded to one Sr(1), one Sr(2), one Sr(4), two equivalent Sr(3), and one Pd(2) atom to form distorted OSr5Pd octahedra that share corners with three equivalent O(2)Sr5Pd octahedra, corners with three equivalent O(4)Sr5Pd octahedra, corners with four equivalent O(3)Sr5Pd octahedra, corners with five equivalent O(1)Sr4Pd2 octahedra,  an edgeedge with one O(2)Sr5Pd octahedra,  an edgeedge with one O(4)Sr5Pd octahedra, edges with two equivalent O(3)Sr5Pd octahedra,  a faceface with one O(1)Sr4Pd2 octahedra, faces with two equivalent O(2)Sr5Pd octahedra, and faces with two equivalent O(4)Sr5Pd octahedra. The corner-sharing octahedral tilt angles range from 1-66°.