As2Si
Donohue, P.C.Siemons, W.J.Gillson, J.L.
Journal of Physics and Chemistry of Solids (1968) 29, 807-813
a=6.0232Å b=6.0232Å c=6.0232Å
α=90° β=90° γ=90°
H8N2O
Siemons, W.J.Templeton, D.H.
Acta Crystallographica (1,1948-23,1967) (1954) 7, 194-198
a=8.41Å b=8.41Å c=5.33Å