Citation: Rossi, G.; Tazzoli, V.; Ungaretti, L. (1974). The crystal structure of ussingite. American Mineralogist, 59, pp. 335-340.
Formula: Al H Na2 O9 Si3
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al2 H2 O18 Si6 (Al H O9 Si3)
Multiplicity: 1