CaHg3 crystallizes in the hexagonal P6_3/mmc space group. Ca(1) is bonded to twelve equivalent Hg(1) atoms to form a mixture of corner and face-sharing CaHg12 cuboctahedra. Hg(1) is bonded in a 4-coordinate geometry to four equivalent Ca(1) atoms.
CaHg3 crystallizes in the hexagonal P6_3/mmc space group. Ca(1) is bonded to twelve equivalent Hg(1) atoms to form a mixture of corner and face-sharing CaHg12 cuboctahedra. There are six shorter (3.23 Å) and six longer (3.35 Å) Ca(1)-Hg(1) bond lengths. Hg(1) is bonded in a 4-coordinate geometry to four equivalent Ca(1) atoms.