Al4 Si8 O22

Al₄O₂₂Si₈

MacKenzie, K.J.D.Brown, I.W.M.Meinhold, R.H.Bowden, M.E.

Journal of the American Ceramic Society (1985) 68, 266-272

a=5.2Å   b=9.15Å   c=9.45Å

α=92°   β=98.83°   γ=89.03°