heulandite
noun
Forms heulandites
- noun (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.
Etymology
From Heuland + -ite after British mineral collector John Henry Heuland (1778-1856).
Webster’s 1913
- noun 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.
Etymology [After Heuland, an English mineralogist.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “heulandite”, CC BY-SA 4.0. Details