Heulandite-K Mineral Data

General Heulandite-K Information
Chemical Formula:	(K,Na,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O)
Composition:	Molecular Weight = 2,900.18 gm
	Potassium 3.24 % K 3.90 % K₂O
	Barium 0.57 % Ba 0.63 % BaO
	Sodium 0.76 % Na 1.03 % Na₂O
	Strontium 1.69 % Sr 2.00 % SrO
	Calcium 2.27 % Ca 3.17 % CaO
	Magnesium 0.54 % Mg 0.89 % MgO
	Aluminum 8.45 % Al 15.96 % Al₂O₃
	Iron 1.08 % Fe 1.54 % Fe₂O₃
	Silicon 25.64 % Si 54.86 % SiO₂
	Hydrogen 1.80 % H 16.05 % H₂O
	Oxygen 53.98 % O
	______ ______
	100.00 % 100.03 % = TOTAL OXIDE
Empirical Formula:	K_2.4Na_0.96Ca_1.64Mg_0.64Sr_0.56Ba_0.12Al_9.08Fe³⁺_0.56Si_26.48O₇₂�25.84(H₂O)
Environment:	Low temperature zeolite found in a wide variety of geologic environments: volcanic rocks, metamorphic rocks, pegmatites, tuffs, and deep-sea sediments.
IMA Status:	Approved IMA 1998 (Dana # Added)
Locality:	Albero Bassi, Vicenza, Italy. Link to MinDat.org Location Data.
Name Origin:	Named after the English mineral collector, John Henry Heuland (1778-1856), a British mineral collector and dealer. The K-dominant member of the heulandite series.
Name Pronunciation:	Heulandite-K + Pronunciation
Synonym:	Beaumontite
	Lamellar zeolite