heulandite


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Related to heulandite: natrolite, Thomsonite, stilbite

heu·land·ite

 (hyo͞o′lən-dīt′)
n.
A white, red, or yellow zeolite mineral, CaO·Al2O3·6SiO2·5H2O.

[After Henry Heuland, 19th-century British mineralogist.]

heulandite

(ˈhjuːlənˌdaɪt)
n
(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]

heu•land•ite

(ˈhyu lənˌdaɪt)

n.
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]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.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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References in periodicals archive ?
There are many species of zeolites, such as Analcime, Chabazite, Clinoptilolite, Faujasite, Ferrierite, Heulandite, Laumontite, Mordenite.
Heulandite or calcite replaces the schist fragments.
Geological Survey has reported natural zeolites' worldwide occurrence in the USA, Japan, Korea, Bulgaria, Czechoslovakia, Romania, Hungary, Russia, Yugoslavia, South Africa, Italy, Germany, Turkey and China, the latter having the greatest worldwide production Clinoptilolite, mordenite, heulandite, chabazite, phillipsite and laumontite are some of the more than 40 known natural zeolites occurring in reasonably high quantities and purity.
A basalt quarry near the town of Sambava is the site of Madagascar's first known occurrence of calcite, stilbite, laumontite and heulandite in fine specimens.
For example, Zeolite was dominated by heulandite, with lesser amounts of quartz and smectite.
Comparison is made with assemblages at Arlington Quarry on North Mountain, where the dominant zeolite minerals are heulandite (sensu stricto) and stilbite.
Although not a major producer of collector-quality specimens, it has yielded fine examples of heulandite, stilbite, calcite, chalcedony, datolite and prehnite.
The deep-sea volcanogenic accumulations interlayered with basalt effusives contain the following secondary silicates in semiquantitative relations: saponite > analcime, wairakite > chlorite, actinolite, tremolite > heulandite, clinoptilolite (?
Some "flowers" came out loose; others have small crystals of heulandite, stilbite, analcime or calcite attached to their bases.
The common zeolites, including heulandite and stilbite, are calcium-dominated minerals that are fairly high in silica.
Finely acicular crystals on tanzanite and heulandite have also been identified (by X-ray diffraction; courtesy of Mike Keim).
net) had a flat of unusual-looking heulandite specimens, between 2.