O2Si
Graetsch, H.Topalovic-Dierdorf I
European Journal of Mineralogy (1996) 8, 103-113
a=15.021Å b=8.6004Å c=16.4338Å
α=90.° β=91.512° γ=90.°
a=5.007Å b=8.6004Å c=8.2169Å
α=90° β=91.512° γ=90°