K3Tl is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. K(1) is bonded to eight equivalent K(1) and four equivalent Tl(1) atoms to form distorted KK8Tl4 cuboctahedra that share corners with twelve equivalent K(1)K8Tl4 cuboctahedra, edges with eight equivalent Tl(1)K12 cuboctahedra, edges with sixteen equivalent K(1)K8Tl4 cuboctahedra, faces with four equivalent Tl(1)K12 cuboctahedra, and faces with fourteen equivalent K(1)K8Tl4 cuboctahedra. Tl(1) is bonded to twelve equivalent K(1) atoms to form TlK12 cuboctahedra that share corners with twelve equivalent Tl(1)K12 cuboctahedra, edges with twenty-four equivalent K(1)K8Tl4 cuboctahedra, faces with six equivalent Tl(1)K12 cuboctahedra, and faces with twelve equivalent K(1)K8Tl4 cuboctahedra.
K3Tl is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. K(1) is bonded to eight equivalent K(1) and four equivalent Tl(1) atoms to form distorted KK8Tl4 cuboctahedra that share corners with twelve equivalent K(1)K8Tl4 cuboctahedra, edges with eight equivalent Tl(1)K12 cuboctahedra, edges with sixteen equivalent K(1)K8Tl4 cuboctahedra, faces with four equivalent Tl(1)K12 cuboctahedra, and faces with fourteen equivalent K(1)K8Tl4 cuboctahedra. All K(1)-K(1) bond lengths are 4.18 Å. All K(1)-Tl(1) bond lengths are 4.18 Å. Tl(1) is bonded to twelve equivalent K(1) atoms to form TlK12 cuboctahedra that share corners with twelve equivalent Tl(1)K12 cuboctahedra, edges with twenty-four equivalent K(1)K8Tl4 cuboctahedra, faces with six equivalent Tl(1)K12 cuboctahedra, and faces with twelve equivalent K(1)K8Tl4 cuboctahedra.