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heulandite

[hyoo-luh n-dahyt] /ˈhyu lənˌdaɪt/
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.
Origin of heulandite
1815-1825
1815-25; named after Henry Heuland, 19th-century English mineral collector; see -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for heulandite

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: CaAl2Si7O18.6H2O
Word Origin
C19: named after H. Heuland, 19th-century English mineral collector; see -ite1
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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