片沸石
Heulandite \Heu"land*ite\, n. [After Heuland, an English mineralogist.] (Min.) A mineral of the Zeolite family, often occurring in amygdaloid, in foliated masses, and also in monoclinic crystals with pearly luster on the cleavage face. It is a hydrous silicate of alumina and lime.
heulandite n : a group of minerals of the zeolite family consisting of a hydrous aluminum silicate of sodium and calcium