Ba3Hg10Cd crystallizes in the orthorhombic Immm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to four equivalent Hg(1) and eight equivalent Hg(2) atoms to form face-sharing BaHg12 cuboctahedra. In the second Ba site, Ba(2) is bonded in a 14-coordinate geometry to two equivalent Hg(3), six equivalent Hg(1), and six equivalent Hg(2) atoms. There are three inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 8-coordinate geometry to one Ba(1), three equivalent Ba(2), three equivalent Hg(2), and one Cd(1) atom. In the second Hg site, Hg(2) is bonded in a 10-coordinate geometry to two equivalent Ba(1), three equivalent Ba(2), one Hg(2), one Hg(3), and three equivalent Hg(1) atoms. In the third Hg site, Hg(3) is bonded in a 6-coordinate geometry to two equivalent Ba(2), two equivalent Hg(2), and two equivalent Cd(1) atoms. Cd(1) is bonded in a distorted body-centered cubic geometry to four equivalent Hg(1) and four equivalent Hg(3) atoms.
Ba3Hg10Cd crystallizes in the orthorhombic Immm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to four equivalent Hg(1) and eight equivalent Hg(2) atoms to form face-sharing BaHg12 cuboctahedra. All Ba(1)-Hg(1) bond lengths are 3.69 Å. All Ba(1)-Hg(2) bond lengths are 3.92 Å. In the second Ba site, Ba(2) is bonded in a 14-coordinate geometry to two equivalent Hg(3), six equivalent Hg(1), and six equivalent Hg(2) atoms. Both Ba(2)-Hg(3) bond lengths are 3.65 Å. There are four shorter (3.57 Å) and two longer (3.81 Å) Ba(2)-Hg(1) bond lengths. There are four shorter (3.70 Å) and two longer (3.73 Å) Ba(2)-Hg(2) bond lengths. There are three inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 8-coordinate geometry to one Ba(1), three equivalent Ba(2), three equivalent Hg(2), and one Cd(1) atom. There are two shorter (3.10 Å) and one longer (3.17 Å) Hg(1)-Hg(2) bond length. The Hg(1)-Cd(1) bond length is 3.03 Å. In the second Hg site, Hg(2) is bonded in a 10-coordinate geometry to two equivalent Ba(1), three equivalent Ba(2), one Hg(2), one Hg(3), and three equivalent Hg(1) atoms. The Hg(2)-Hg(2) bond length is 2.94 Å. The Hg(2)-Hg(3) bond length is 3.07 Å. In the third Hg site, Hg(3) is bonded in a 6-coordinate geometry to two equivalent Ba(2), two equivalent Hg(2), and two equivalent Cd(1) atoms. Both Hg(3)-Cd(1) bond lengths are 3.23 Å. Cd(1) is bonded in a distorted body-centered cubic geometry to four equivalent Hg(1) and four equivalent Hg(3) atoms.