Also found in: Thesaurus, Encyclopedia, Wikipedia.
A white, red, or yellow zeolite mineral, CaO·Al2O3·6SiO2·5H2O.
[After Henry Heuland, 19th-century British mineralogist.]
(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]
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]
Switch to new thesaurus
|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