Citation: Galli, E.; Preisinger, A.; Gottardi, G.; Mayer, H.; Passaglia, E. (1983). The structure of potassium-exchanged heulandite at 293, 373 and 593 K. Acta Crystallographica B (39,1983-), 39, pp. 189-197.
Formula: Al9 K6.22 O72 Si27
Chemical name: K6.22 (Al9 Si27) O72
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