Kr
Sonnenblick, Y.Alexander, E.Kalman, Z. H.Steinberger, I. T.
Chemical Physics Letters (1977) 52, 276-278
a=4.00Å b=4.00Å c=6.53Å
α=90° β=90° γ=120°
Xe
a=4.34Å b=4.34Å c=7.09Å