Sr3Ca(PbO4)2 crystallizes in the monoclinic Pm space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), two equivalent O(6), and two equivalent O(8) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), two equivalent O(5), and two equivalent O(7) atoms. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), two equivalent O(6), and two equivalent O(8) atoms. Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(4), two equivalent O(5), and two equivalent O(7) atoms. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to one O(7), one O(8), two equivalent O(1), and two equivalent O(2) atoms to form edge-sharing PbO6 octahedra. In the second Pb site, Pb(2) is bonded to one O(5), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form edge-sharing PbO6 octahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Sr(2), one Sr(3), one Ca(1), and two equivalent Pb(1) atoms to form OSr2CaPb2 trigonal bipyramids that share corners with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, corners with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(2)Sr3Pb2 trigonal bipyramids, corners with two equivalent O(6)Sr4Pb trigonal bipyramids, edges with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(2)Sr3Pb2 trigonal bipyramids, and edges with two equivalent O(8)Sr4Pb trigonal bipyramids. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one Sr(3), and two equivalent Pb(1) atoms to form distorted OSr3Pb2 trigonal bipyramids that share corners with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, corners with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(2)Sr3Pb2 trigonal bipyramids, corners with two equivalent O(8)Sr4Pb trigonal bipyramids, edges with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(6)Sr4Pb trigonal bipyramids, and edges with two equivalent O(8)Sr4Pb trigonal bipyramids. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), one Ca(1), and two equivalent Pb(2) atoms to form OSr2CaPb2 trigonal bipyramids that share corners with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, corners with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(2)Sr3Pb2 trigonal bipyramids, corners with two equivalent O(8)Sr4Pb trigonal bipyramids, edges with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, and edges with two equivalent O(6)Sr4Pb trigonal bipyramids. In the fourth O site, O(4) is bonded to one Sr(1), one Sr(3), one Ca(1), and two equivalent Pb(2) atoms to form distorted OSr2CaPb2 trigonal bipyramids that share corners with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, corners with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(2)Sr3Pb2 trigonal bipyramids, corners with two equivalent O(6)Sr4Pb trigonal bipyramids, edges with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(6)Sr4Pb trigonal bipyramids, and edges with two equivalent O(8)Sr4Pb trigonal bipyramids. In the fifth O site, O(5) is bonded to two equivalent Sr(2), two equivalent Ca(1), and one Pb(2) atom to form distorted OSr2Ca2Pb trigonal bipyramids that share  a cornercorner with one O(6)Sr4Pb trigonal bipyramid, corners with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(2)Sr3Pb2 trigonal bipyramids, corners with four equivalent O(7)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, and edges with two equivalent O(4)Sr2CaPb2 trigonal bipyramids. In the sixth O site, O(6) is bonded to two equivalent Sr(1), two equivalent Sr(3), and one Pb(2) atom to form distorted OSr4Pb trigonal bipyramids that share  a cornercorner with one O(5)Sr2Ca2Pb trigonal bipyramid, corners with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, corners with four equivalent O(8)Sr4Pb trigonal bipyramids, edges with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(2)Sr3Pb2 trigonal bipyramids, edges with two equivalent O(6)Sr4Pb trigonal bipyramids, and edges with two equivalent O(8)Sr4Pb trigonal bipyramids. In the seventh O site, O(7) is bonded to two equivalent Sr(2), two equivalent Ca(1), and one Pb(1) atom to form distorted OSr2Ca2Pb trigonal bipyramids that share  a cornercorner with one O(8)Sr4Pb trigonal bipyramid, corners with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, corners with four equivalent O(5)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, and edges with two equivalent O(2)Sr3Pb2 trigonal bipyramids. In the eighth O site, O(8) is bonded to two equivalent Sr(1), two equivalent Sr(3), and one Pb(1) atom to form distorted OSr4Pb trigonal bipyramids that share  a cornercorner with one O(7)Sr2Ca2Pb trigonal bipyramid, corners with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(2)Sr3Pb2 trigonal bipyramids, corners with four equivalent O(6)Sr4Pb trigonal bipyramids, edges with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(2)Sr3Pb2 trigonal bipyramids, edges with two equivalent O(6)Sr4Pb trigonal bipyramids, and edges with two equivalent O(8)Sr4Pb trigonal bipyramids.
Sr3Ca(PbO4)2 crystallizes in the monoclinic Pm space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), two equivalent O(6), and two equivalent O(8) atoms. The Sr(1)-O(2) bond length is 2.99 Å. The Sr(1)-O(3) bond length is 2.66 Å. The Sr(1)-O(4) bond length is 2.51 Å. Both Sr(1)-O(6) bond lengths are 2.54 Å. Both Sr(1)-O(8) bond lengths are 2.54 Å. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), two equivalent O(5), and two equivalent O(7) atoms. The Sr(2)-O(1) bond length is 2.52 Å. The Sr(2)-O(2) bond length is 2.67 Å. The Sr(2)-O(3) bond length is 2.79 Å. Both Sr(2)-O(5) bond lengths are 2.57 Å. Both Sr(2)-O(7) bond lengths are 2.56 Å. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), two equivalent O(6), and two equivalent O(8) atoms. The Sr(3)-O(1) bond length is 2.67 Å. The Sr(3)-O(2) bond length is 2.51 Å. The Sr(3)-O(4) bond length is 2.97 Å. Both Sr(3)-O(6) bond lengths are 2.54 Å. Both Sr(3)-O(8) bond lengths are 2.53 Å. Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(4), two equivalent O(5), and two equivalent O(7) atoms. The Ca(1)-O(1) bond length is 2.86 Å. The Ca(1)-O(3) bond length is 2.47 Å. The Ca(1)-O(4) bond length is 2.62 Å. Both Ca(1)-O(5) bond lengths are 2.44 Å. Both Ca(1)-O(7) bond lengths are 2.44 Å. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to one O(7), one O(8), two equivalent O(1), and two equivalent O(2) atoms to form edge-sharing PbO6 octahedra. The Pb(1)-O(7) bond length is 2.17 Å. The Pb(1)-O(8) bond length is 2.17 Å. Both Pb(1)-O(1) bond lengths are 2.30 Å. Both Pb(1)-O(2) bond lengths are 2.32 Å. In the second Pb site, Pb(2) is bonded to one O(5), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form edge-sharing PbO6 octahedra. The Pb(2)-O(5) bond length is 2.15 Å. The Pb(2)-O(6) bond length is 2.15 Å. Both Pb(2)-O(3) bond lengths are 2.35 Å. Both Pb(2)-O(4) bond lengths are 2.30 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Sr(2), one Sr(3), one Ca(1), and two equivalent Pb(1) atoms to form OSr2CaPb2 trigonal bipyramids that share corners with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, corners with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(2)Sr3Pb2 trigonal bipyramids, corners with two equivalent O(6)Sr4Pb trigonal bipyramids, edges with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(2)Sr3Pb2 trigonal bipyramids, and edges with two equivalent O(8)Sr4Pb trigonal bipyramids. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one Sr(3), and two equivalent Pb(1) atoms to form distorted OSr3Pb2 trigonal bipyramids that share corners with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, corners with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(2)Sr3Pb2 trigonal bipyramids, corners with two equivalent O(8)Sr4Pb trigonal bipyramids, edges with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(6)Sr4Pb trigonal bipyramids, and edges with two equivalent O(8)Sr4Pb trigonal bipyramids. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), one Ca(1), and two equivalent Pb(2) atoms to form OSr2CaPb2 trigonal bipyramids that share corners with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, corners with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(2)Sr3Pb2 trigonal bipyramids, corners with two equivalent O(8)Sr4Pb trigonal bipyramids, edges with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, and edges with two equivalent O(6)Sr4Pb trigonal bipyramids. In the fourth O site, O(4) is bonded to one Sr(1), one Sr(3), one Ca(1), and two equivalent Pb(2) atoms to form distorted OSr2CaPb2 trigonal bipyramids that share corners with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, corners with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(2)Sr3Pb2 trigonal bipyramids, corners with two equivalent O(6)Sr4Pb trigonal bipyramids, edges with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(6)Sr4Pb trigonal bipyramids, and edges with two equivalent O(8)Sr4Pb trigonal bipyramids. In the fifth O site, O(5) is bonded to two equivalent Sr(2), two equivalent Ca(1), and one Pb(2) atom to form distorted OSr2Ca2Pb trigonal bipyramids that share  a cornercorner with one O(6)Sr4Pb trigonal bipyramid, corners with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(2)Sr3Pb2 trigonal bipyramids, corners with four equivalent O(7)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, and edges with two equivalent O(4)Sr2CaPb2 trigonal bipyramids. In the sixth O site, O(6) is bonded to two equivalent Sr(1), two equivalent Sr(3), and one Pb(2) atom to form distorted OSr4Pb trigonal bipyramids that share  a cornercorner with one O(5)Sr2Ca2Pb trigonal bipyramid, corners with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, corners with four equivalent O(8)Sr4Pb trigonal bipyramids, edges with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(2)Sr3Pb2 trigonal bipyramids, edges with two equivalent O(6)Sr4Pb trigonal bipyramids, and edges with two equivalent O(8)Sr4Pb trigonal bipyramids. In the seventh O site, O(7) is bonded to two equivalent Sr(2), two equivalent Ca(1), and one Pb(1) atom to form distorted OSr2Ca2Pb trigonal bipyramids that share  a cornercorner with one O(8)Sr4Pb trigonal bipyramid, corners with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, corners with four equivalent O(5)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(5)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(7)Sr2Ca2Pb trigonal bipyramids, edges with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, and edges with two equivalent O(2)Sr3Pb2 trigonal bipyramids. In the eighth O site, O(8) is bonded to two equivalent Sr(1), two equivalent Sr(3), and one Pb(1) atom to form distorted OSr4Pb trigonal bipyramids that share  a cornercorner with one O(7)Sr2Ca2Pb trigonal bipyramid, corners with two equivalent O(3)Sr2CaPb2 trigonal bipyramids, corners with two equivalent O(2)Sr3Pb2 trigonal bipyramids, corners with four equivalent O(6)Sr4Pb trigonal bipyramids, edges with two equivalent O(1)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(4)Sr2CaPb2 trigonal bipyramids, edges with two equivalent O(2)Sr3Pb2 trigonal bipyramids, edges with two equivalent O(6)Sr4Pb trigonal bipyramids, and edges with two equivalent O(8)Sr4Pb trigonal bipyramids.