Ca5Pb3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to six equivalent Pb(1) atoms. In the second Ca site, Ca(2) is bonded in a 5-coordinate geometry to five equivalent Pb(1) atoms. Pb(1) is bonded in a 9-coordinate geometry to four equivalent Ca(1) and five equivalent Ca(2) atoms.
Ca5Pb3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to six equivalent Pb(1) atoms. All Ca(1)-Pb(1) bond lengths are 3.40 Å. In the second Ca site, Ca(2) is bonded in a 5-coordinate geometry to five equivalent Pb(1) atoms. There are a spread of Ca(2)-Pb(1) bond distances ranging from 3.23-3.62 Å. Pb(1) is bonded in a 9-coordinate geometry to four equivalent Ca(1) and five equivalent Ca(2) atoms.