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heulandite |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: 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.
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