As4Se4
Renninger, A.L.Averbach, B.L.
Acta Crystallographica B (24,1968-38,1982) (1973) 29, 1583-1589
a=6.69Å b=13.86Å c=10Å
α=90° β=113.2° γ=90°
As2Se3
a=4.3Å b=9.94Å c=12.84Å
α=90° β=109.1° γ=90°