Heulandite
		Merkle, A.B. and Slaughter, M. The crystal structure of heulandite (Ca,Na2)[Al2Si7O18]·6H2O Am. Mineral., 52, 273-276 (1967)		[Al8Si28O72]-HEU
	*Heulandite
		Alberti, A. On the Crystal Structure of the Zeolite Heulandite Tschermaks Min. Petr. Mitt., 18, 129-146 (1972)		|Ca4 (H2O)24 | [Al8Si28O72]-HEU XRD pattern:  Heulandite
	Clinoptilolite
		Koyama, K. and Takeuchi, Y. Clinoptilolite: the distribution of potassium atoms and its role in thermal stability Z. Kristallogr., 145, 216-239 (1977)		[Al - Si - O]-HEU
	Ca,NH4-Heulandite, dehydrated
		Mortier, W.J. and Pearce, J.R. Thermal stability of the heulandite-type framework: crystal structure of the calcium / ammonium form dehydrated at 483K Am. Mineral., 66, 309-314 (1981)		[Al8.3Si27.7O72]-HEU
	K-Heulandite
		Galli, E., Gottardi, G., Mayer, H., Preisindex, A. and Passaglia, E. The Structure of Potassium-Exchanged Heulandlte at 293, 373 and 593 K Acta Cryst., B39, 189-197 (1983)		|Na0.1K8.57Ba0.4(H2O)19.56| [A19.31Si26.83O72]-HEU
	LZ-219
		Breck, D.W. and Skeels, G.W. Silicon substituted zeolite compositions and process for preparing same US Patent, , 4,503,023 (1985)		[Al - Si - O]-HEU
	Heulandite, as-made, hydrated
		Khodabandeh, S., Davis, M.E. Synthesis of a heulandite-type zeolite by hydrothermal conversion of zeolite Pl Chem. Commun., , 1205-1206 (1996)		|Ca - H2O| [Si27Al9O72]-HEU  (heulandite synthesized from Ca-P1)
	Ba-Heulandite
		Larsen, A.O., Nordrum, F.S., Dobelin, N., Armbruster, T., Petersen, O.V. and Erambert, M. Heulandite-Ba, a new zeolite species from Norway Eur. J. Mineral., 17, 143-153 (2005)		[Al9Si27O72]-HEU

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