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heulandite
7/15/2016
(Ca,Na)2-3Al3(Al,Si)2Si13O36 · 12H2O

The above is the general Heulandite formula. The formula for the individual members categorized by the
IMA are:
Heulandite-Ca: (Ca,Na)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-Na: (Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-K: (K,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-Ba: (Ba,Ca,K,Na,Sr)2-3Al3(Al,Si)2Si13O36 · 12H2O
Heulandite-Sr: (Sr,Na,Ca)2-3Al3(Al,Si)2Si13O36 · 12H2O

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