SrCaPb6 is Uranium Silicide-derived structured and crystallizes in the tetragonal P4/mmm space group. Sr(1) is bonded to four equivalent Pb(3) and eight equivalent Pb(1) atoms to form SrPb12 cuboctahedra that share corners with four equivalent Sr(1)Pb12 cuboctahedra, corners with eight equivalent Ca(1)Pb12 cuboctahedra, faces with two equivalent Ca(1)Pb12 cuboctahedra, and faces with four equivalent Sr(1)Pb12 cuboctahedra. Ca(1) is bonded to four equivalent Pb(2) and eight equivalent Pb(1) atoms to form CaPb12 cuboctahedra that share corners with four equivalent Ca(1)Pb12 cuboctahedra, corners with eight equivalent Sr(1)Pb12 cuboctahedra, faces with two equivalent Sr(1)Pb12 cuboctahedra, and faces with four equivalent Ca(1)Pb12 cuboctahedra. There are three inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sr(1) and two equivalent Ca(1) atoms. In the second Pb site, Pb(2) is bonded in a distorted square co-planar geometry to four equivalent Ca(1) atoms. In the third Pb site, Pb(3) is bonded in a square co-planar geometry to four equivalent Sr(1) atoms.
SrCaPb6 is Uranium Silicide-derived structured and crystallizes in the tetragonal P4/mmm space group. Sr(1) is bonded to four equivalent Pb(3) and eight equivalent Pb(1) atoms to form SrPb12 cuboctahedra that share corners with four equivalent Sr(1)Pb12 cuboctahedra, corners with eight equivalent Ca(1)Pb12 cuboctahedra, faces with two equivalent Ca(1)Pb12 cuboctahedra, and faces with four equivalent Sr(1)Pb12 cuboctahedra. All Sr(1)-Pb(3) bond lengths are 3.51 Å. All Sr(1)-Pb(1) bond lengths are 3.54 Å. Ca(1) is bonded to four equivalent Pb(2) and eight equivalent Pb(1) atoms to form CaPb12 cuboctahedra that share corners with four equivalent Ca(1)Pb12 cuboctahedra, corners with eight equivalent Sr(1)Pb12 cuboctahedra, faces with two equivalent Sr(1)Pb12 cuboctahedra, and faces with four equivalent Ca(1)Pb12 cuboctahedra. All Ca(1)-Pb(2) bond lengths are 3.51 Å. All Ca(1)-Pb(1) bond lengths are 3.47 Å. There are three inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sr(1) and two equivalent Ca(1) atoms. In the second Pb site, Pb(2) is bonded in a distorted square co-planar geometry to four equivalent Ca(1) atoms. In the third Pb site, Pb(3) is bonded in a square co-planar geometry to four equivalent Sr(1) atoms.