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heulandite

[ hyoo-luhn-dahyt ]

noun

  1. a white or transparent, colorless mineral of the zeolite family, hydrous calcium aluminum silicate, CaAl 2 Si 7 O 18 ⋅6H 2 O, occurring in basic volcanic rocks in the form of crystals with a pearly luster.

heulandite

/ ˈhjuːlənˌdaɪt /

noun

  1. a white, grey, red, or brown zeolite mineral that consists essentially of hydrated calcium aluminium silicate in the form of elongated tabular crystals. Formula: CaAl 2 Si 7 O 18 .6H 2 O
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of heulandite1

1815–25; named after Henry Heuland, 19th-century English mineral collector; -ite 1
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Word History and Origins

Origin of heulandite1

C19: named after H. Heuland, 19th-century English mineral collector; see -ite 1
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Example Sentences

Heulandite is distinguished from stilbite by its crystals and perfect solubility; from apopholite by form of crystals.

Isomorphous with heulandite is the strontium and barium zeolite brewsterite, named after Sir David Brewster.

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