Citation: Cadoni, Marcella; Ferraris, Giovanni (2008). Penkvilksite-2O: Na~2~TiSi~4~O~11~·2H~2~O. Acta Crystallographica Section C, 64, pp. i87-i90.
Formula: H4 Na2 O13 Si4 Ti
Chemical name: disodium titanium tetrasilicate dihydrate
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: O44 Si16 Ti4 (O11 Si4 Ti)
Multiplicity: 1
Coordination sequences: