Sr5Pb3ZnO12 crystallizes in the trigonal P31m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to three equivalent O(3) and six equivalent O(2) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(1), and four equivalent O(2) atoms. Zn(1) is bonded in a trigonal planar geometry to three equivalent O(1) atoms. Pb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form edge-sharing PbO6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(2), one Zn(1), and two equivalent Pb(1) atoms to form distorted OSr2ZnPb2 trigonal bipyramids that share corners with two equivalent O(1)Sr2ZnPb2 trigonal bipyramids, corners with four equivalent O(3)Sr3Pb2 trigonal bipyramids, corners with four equivalent O(2)Sr4Pb trigonal bipyramids,  an edgeedge with one O(3)Sr3Pb2 trigonal bipyramid, edges with two equivalent O(1)Sr2ZnPb2 trigonal bipyramids, and edges with four equivalent O(2)Sr4Pb trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and one Pb(1) atom to form distorted OSr4Pb trigonal bipyramids that share corners with two equivalent O(1)Sr2ZnPb2 trigonal bipyramids, corners with two equivalent O(3)Sr3Pb2 trigonal bipyramids, corners with seven equivalent O(2)Sr4Pb trigonal bipyramids, edges with two equivalent O(1)Sr2ZnPb2 trigonal bipyramids, edges with four equivalent O(3)Sr3Pb2 trigonal bipyramids, and edges with five equivalent O(2)Sr4Pb trigonal bipyramids. In the third O site, O(3) is bonded to one Sr(2), two equivalent Sr(1), and two equivalent Pb(1) atoms to form distorted OSr3Pb2 trigonal bipyramids that share corners with four equivalent O(1)Sr2ZnPb2 trigonal bipyramids, corners with four equivalent O(2)Sr4Pb trigonal bipyramids, corners with six equivalent O(3)Sr3Pb2 trigonal bipyramids,  an edgeedge with one O(1)Sr2ZnPb2 trigonal bipyramid, and edges with eight equivalent O(2)Sr4Pb trigonal bipyramids.
Sr5Pb3ZnO12 crystallizes in the trigonal P31m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to three equivalent O(3) and six equivalent O(2) atoms. All Sr(1)-O(3) bond lengths are 3.00 Å. There are three shorter (2.67 Å) and three longer (2.69 Å) Sr(1)-O(2) bond lengths. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(1), and four equivalent O(2) atoms. The Sr(2)-O(3) bond length is 2.41 Å. Both Sr(2)-O(1) bond lengths are 2.72 Å. There are two shorter (2.59 Å) and two longer (2.61 Å) Sr(2)-O(2) bond lengths. Zn(1) is bonded in a trigonal planar geometry to three equivalent O(1) atoms. All Zn(1)-O(1) bond lengths are 1.88 Å. Pb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form edge-sharing PbO6 octahedra. There is one shorter (2.35 Å) and one longer (2.50 Å) Pb(1)-O(1) bond length. Both Pb(1)-O(2) bond lengths are 2.14 Å. There is one shorter (2.21 Å) and one longer (2.22 Å) Pb(1)-O(3) bond length. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(2), one Zn(1), and two equivalent Pb(1) atoms to form distorted OSr2ZnPb2 trigonal bipyramids that share corners with two equivalent O(1)Sr2ZnPb2 trigonal bipyramids, corners with four equivalent O(3)Sr3Pb2 trigonal bipyramids, corners with four equivalent O(2)Sr4Pb trigonal bipyramids,  an edgeedge with one O(3)Sr3Pb2 trigonal bipyramid, edges with two equivalent O(1)Sr2ZnPb2 trigonal bipyramids, and edges with four equivalent O(2)Sr4Pb trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and one Pb(1) atom to form distorted OSr4Pb trigonal bipyramids that share corners with two equivalent O(1)Sr2ZnPb2 trigonal bipyramids, corners with two equivalent O(3)Sr3Pb2 trigonal bipyramids, corners with seven equivalent O(2)Sr4Pb trigonal bipyramids, edges with two equivalent O(1)Sr2ZnPb2 trigonal bipyramids, edges with four equivalent O(3)Sr3Pb2 trigonal bipyramids, and edges with five equivalent O(2)Sr4Pb trigonal bipyramids. In the third O site, O(3) is bonded to one Sr(2), two equivalent Sr(1), and two equivalent Pb(1) atoms to form distorted OSr3Pb2 trigonal bipyramids that share corners with four equivalent O(1)Sr2ZnPb2 trigonal bipyramids, corners with four equivalent O(2)Sr4Pb trigonal bipyramids, corners with six equivalent O(3)Sr3Pb2 trigonal bipyramids,  an edgeedge with one O(1)Sr2ZnPb2 trigonal bipyramid, and edges with eight equivalent O(2)Sr4Pb trigonal bipyramids.