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

Word History and Origins

Origin of heulandite¹

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

Word History and Origins

Origin of heulandite¹

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

Example Sentences

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

From Project Gutenberg

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

From Project Gutenberg