Na (Si2 O4 (O H))

HNaO₅Si₂

Sassi, M.Gramlich, V.Josien, L.Miehe-Brendle, J.Paillaud, J.-L.Benggedach, A.Patarin, J.

Microporous and Mesoporous Materials (2003) 64, 51-61

a=27.32Å   b=15.4Å   c=8.241Å

α=90°   β=90°   γ=90°