B5CaH8NaO13
Bermanec, V.Armbruster, T.Tibljas, D.Sturman, D.Kniewald, G.
American Mineralogist (1994) 79, 562-569
a=6.506Å b=13.280Å c=11.462Å
α=90° β=92.97° γ=90°