heulandite

[hyoo-luh n-dahyt]

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.

Origin of heulandite

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

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Examples from the Web for heulandite

Historical Examples of heulandite

Heulandite is distinguished from stilbite by its crystals and perfect solubility; from apopholite by form of crystals.
Scientific American Supplement, No. 344, August 5, 1882
Various
Isomorphous with heulandite is the strontium and barium zeolite brewsterite, named after Sir David Brewster.
Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4
Various

British Dictionary definitions for heulandite

heulandite

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