O2Si
Pakhomov, V.I.Goryunov, A.V.Pakhomov, P.V.Chibiskova, N.T.
Zhurnal Neorganicheskoi Khimii (1993) 38, 44-50
a=4.916Å b=4.917Å c=5.407Å
α=90° β=90° γ=120°