GeSiV6
Tret'yakov, Yu.D.Kuritsin, V.B.Kodess, B.N.
Physics of Metals and Metallography (1972) 34, 185-187
a=4.748Å b=4.748Å c=4.748Å
α=90° β=90° γ=90°
GeV3
a=4.785Å b=4.785Å c=4.785Å