Ge
Bundy, F.P.Kasper, J.S.
Science (1963) 139, 340-341
a=5.93Å b=5.93Å c=6.98Å
α=90° β=90° γ=90°
C
Bundy, F. P.Kasper, J. S.
Journal of Chemical Physics (1967) 46, 3437-3446
a=2.52Å b=2.52Å c=4.12Å
α=90° β=90° γ=120°