Kalsilite

AlKO₄Si

Cellai, D.Gesing, T. M.Wruck, B.Carpenter, M. A.

American Mineralogist (1999) 84, 1950-1955

a=5.1627Å   b=5.1627Å   c=8.706Å

α=90°   β=90°   γ=120°