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A white, red, or yellow zeolite mineral, CaO·Al2O3·6SiO2·5H2O.
[After Henry Heuland, 19th-century British mineralogist.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Minerals) 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
[C19: named after H. Heuland, 19th-century English mineral collector; see -ite1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a usu. white or transparent zeolite, hydrous calcium-sodium aluminum silicate, occurring as crystals in basic volcanic rocks.
[1815–25; after Henry Heuland, English mineralogist]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||heulandite - a group of minerals of the zeolite family consisting of a hydrous aluminum silicate of sodium and calcium|
zeolite - any of a family of glassy minerals analogous to feldspar containing hydrated aluminum silicates of calcium or sodium or potassium; formed in cavities in lava flows and in plutonic rocks
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