Orientational interaction and ordering of Cd_4 tetrahedra in a quasicrystal approximant

Woosong Choi, Christopher L. Henley, Marek Mihalkovic

We model the quasicrystal-related structure CaCd${}_6$, a bcc packing of icosahedral clusters containing tetrahedra which undergo orientational orderings at T<100 K. We use general s…