Citation: Merkle, A. B.; Slaughter, M. (1968). Determination and refinement of the structure of heulandite. American Mineralogist, 53, pp. 1120-1138.
Formula: Al4.8 Ca1.2 H28 O45.55 Si13.2
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al20 O72 Si36 (Al5 O18 Si9)
Multiplicity: 1