Citation: Mortier, W. J.; Pearce, J. R. (1981). Thermal stability of the heulandite-type framework: Crystal structure of the calcium/ammonium form dehydrated at 483K. American Mineralogist, 66, pp. 309-314.
Formula: Al2.079 Ca0.793 O18 Si6.921
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