Na16 K2 (Si18 O36 (O H)18) (H2 O)38

H₉₄K₂Na₁₆O₉₂Si₁₈

Yamnova, N.A.Rastsvetaeva, R.K.Homyakov, A.P.Pushcharovskii, D.Yu.Mikheeva, M.G.Mernaf, T.

Kristallografiya (1992) 37, 334-343

a=24.91Å   b=11.94Å   c=14.92Å

α=90°   β=94.47°   γ=90°