Al3Na0.335O4.665
Fischer, R. X.Schmucker, M.Angerer, P.Schneider, H.
American Mineralogist (2001) 86, 1513-1518
a=7.6819Å b=7.6810Å c=2.91842Å
α=90° β=90° γ=90°
Al3K0.335O4.665
a=7.6934Å b=7.6727Å c=2.93231Å