heulandite Meaning, Definition & Usage

  1. noun a group of minerals of the zeolite family consisting of a hydrous aluminum silicate of sodium and calcium

WordNet

Heu"land*ite noun
Etymology
After Heuland, an English mineralogist.
Definitions
  1. (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.

Webster 1913