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Webster 1913 Edition

Heulandite

Heu′land-ite

,
Noun.
[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.

Webster 1828 Edition

Heulandite

HEU'LANDITE

,
Adj.
[from M. Heuland.] A mineral, occurring massive, frequently globular, or crystallized in the form of a right oblique-angled prism. It has been ranked among the zeolites,but is now considered as distinct.

Definition 2025

heulandite

heulandite

English

Noun

heulandite ‎(countable and uncountable, plural heulandites)

  1. (mineralogy) A common mineral of the zeolite group with monoclinic crystals, the most usual form being heulandite-Ca (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O.
  1. ↑ Richard V. Gaines, H. Catherine W. Skinner, Eugene E. Foord, Brian Mason, and Abraham Rosenzweig: Dana's new mineralogy, John Wiley & Sons, 1997.

Etymology

Heuland +‎ -ite after British mineral collector John Henry Heuland (1778-1856).[1]

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