gmelinite


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gmelinite

[gə′mel·ə‚nīt]
(mineralogy)
(Na2Ca)Al2Si4O12·6H2O Zeolite mineral that is colorless or lightly colored and crystallizes in the hexagonal system.
References in periodicals archive ?
As potassium-bearing zeolite (phillipsite) is present, the origin of pure gmelinite is improbable.
1979, Gmelinite from the locality of Dobranka near Decin, Cas.
They are "heulandite" (heulandite sensu stricto and clinoptilolite), chabazite, analcime, stilbite, barrerite, epistilbite, gmelinite, laumontite, natrolite, mesolite, scolecite, stellerite, tetranatrolite, thomsonite, and wairakite.
Gmelinite is generally pink and vitreous with well formed colourless hexagonal dipyramid, prism and pinacoid crystals (Fig.
Walker and Parsons (1922) reported analcime, natrolite, thomsonite, and gmelinite, but we have not identified those minerals in our samples.
The most abundant zeolite on the larger island is analcime, whereas gmelinite and chabazite are common and stilbite and natrolite are rare (I.
C C C Gismondine ER ER Glauconite series ER ER Gmelinite series ER ER Goethite R C Graphite ER ER?
Name: For the relationship to the other members of the gmelinite series.
Gmelinite is one of the late-stage minerals in the paragenetic sequence.
In a dozen or so winsome thumbnails and small miniatures, the natrolite makes brightly sparkling radial tufts of tiny acicular crystals, the tufts to 2 cm across, implanted singly or in little grapebunches on a weathered gray rock, with sharp, tan, 2-mm chabazite and/or gmelinite rhombohedrons for garnish.
Laval, Quebec H7X 1X7) obtained some very fine gmelinite crystals associated with natrolite from Ittiri, Sassari, and some world-class specimens of ferrierite from near Monastir, Cagliari.
Finally, even the humble zeolites shine in Kazakhstan: there are plentiful, very pretty miniature-to-cabinet-sized specimens of gmelinite, with flesh-colored rhombohedrons to 1 cm on dark matrix, as well as yellow-orange, shiny stilbite balls and sheaves, from Sokolovskaya.