Re
Vohra, Y.K.Ruoff, A.L.Duclos, S.J.
Physical Review, Serie 3. B - Condensed Matter (18,1978-) (1987) 36, 9790-9792
a=2.491Å b=2.491Å c=4.02Å
α=90° β=90° γ=120°
Si
Duclos, S. J.Vohra, Y. K.Ruoff, A. L.
Physical Review Letters (1987) 58, 775-777
a=3.34Å b=3.34Å c=3.34Å
α=90° β=90° γ=90°