heulandite

[ hyoo-luhn-dahyt ]
/ ˈhyu lənˌdaɪt /

noun

a white or transparent, colorless mineral of the zeolite family, hydrous calcium aluminum silicate, CaAl2Si7O18⋅6H2O, occurring in basic volcanic rocks in the form of crystals with a pearly luster.

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Origin of heulandite

1815–25; named after Henry Heuland, 19th-century English mineral collector; see -ite1

Words nearby heulandite

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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British Dictionary definitions for heulandite

heulandite
/ (ˈhjuːlənˌdaɪt) /

noun

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

Word Origin for heulandite

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