Heulandite-Sr Mineral Data

General Heulandite-Sr Information
Chemical Formula:	(Sr,Na,Ca)2-3Al3(Al,Si)2Si13O36•12(H2O)
Composition:	Molecular Weight = 2,880.96 gm
	Potassium 0.30 % K 0.36 % K₂O
	Barium 0.67 % Ba 0.75 % BaO
	Sodium 0.32 % Na 0.43 % Na₂O
	Strontium 6.39 % Sr 7.55 % SrO
	Calcium 2.45 % Ca 3.43 % CaO
	Magnesium 0.02 % Mg 0.03 % MgO
	Aluminum 8.61 % Al 16.26 % Al₂O₃
	Silicon 26.26 % Si 56.19 % SiO₂
	Hydrogen 1.68 % H 15.01 % H₂O
	Oxygen 53.31 % O
	______ ______
	100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:	Sr_2.1Ca_1.76Ba_0.14Mg_0.02Na_0.4K_0.22Al_9.19Si_26.94O₇₂�24(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 1982 (Dana # Added)
Locality:	Campegli, eastern Ligurian ophiolites, 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 Sr-dominant member of the heulandite series.
Name Pronunciation:	Heulandite-Sr + Pronunciation
Synonym:	Beaumontite
	Lamellar zeolite