Citation: Galli, E.; Gottardi, G.; Passaglia, E.; Mayer, H.; Preisinger, A. (1983). The structure of potassium-exchanged heulandite at 293, 373 and 593 K. Acta Crystallographica B (39,1983-), 39, pp. 189-197.
Formula: Al9 H19.4 K6.92 O81.7 Si27
Chemical name: K6.92 (Al9 Si27 O72) (H2 O)9.7
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al36 O72 Si36 (Al O2 Si)
Multiplicity: 1