Chabazite


Also found in: Dictionary, Thesaurus, Wikipedia.

chabazite

[′kab·ə‚zīt]
(mineralogy)
CaAl2Si4O12·6H2O A white to yellow or red member of the zeolite group occurring in glassy rhombohedral crystals; hardness is 4-5 on Mohs scale, and specific gravity is 2.08-2.16.

Chabazite

 

a mineral of the zeolite group, with the chemical composition (Ca, Na2, K2)Al2Si3–8O10–20(5.4–9.4)H2O and ad mixtures of Ba or Sr. Chabazite crystallizes in the trigonal system, forming rhombohedral crystals up to several centimeters in size. It also occurs in the form of crystalline aggregates and massive cryptocrystalline crusts. Chabazite is white or brownish, with a hardness of 4–5 on Mohs’ scale and a density of 2,080–2,160 kg/m3. It is formed in the pores and amygdules of effusive rocks and replaces volcanic tuff when acted upon by solutions of varied origin. It also occurs in hydrothermal veins and hot springs beds. Commercial deposits of chabazite are located in Bowie, Ariz. Structural analogues of chabazite have been synthesized. (See alsoZEOLITES.)

Mentioned in ?
References in periodicals archive ?
Hollow crystals of gmelinite-Ca could have probably formed by mutual intergrowth with chabazite (described by Tschernich, 1992) and its later dissolution.
They are "heulandite" (heulandite sensu stricto and clinoptilolite), chabazite, analcime, stilbite, barrerite, epistilbite, gmelinite, laumontite, natrolite, mesolite, scolecite, stellerite, tetranatrolite, thomsonite, and wairakite.
The Chabazite zeolite Cu-SCR not only has a superior activity in the low temperature range (a necessity characteristic in order to achieve high deNOx in WHTC) but also exhibits strong performance stability against hydrothermal aging.
Vitillo et al., "Hydrogen storage in Chabazite zeolite frameworks," Physical Chemistry Chemical Physics, vol.
We observed the chabazite structure of catalystbased on the main peaks at 9.5[degrees], 20.8[degrees], and 12.9[degrees] in the XRD patterns [34].
Bischoff mine (cassiterite), Colebrook Hill (axinite-Fe), Waddamana (chabazite).
The growth of the K-phillipsite in a radial array from the centre of K chabazite shows a typical growth mechanism from a nucleating point in an essentially amorphous material.
6 show that samples SK 1 to 4 are composed of generally quartz, calcite ankerite, zeolite (chabazite), feldspar and smectite.
Another granite pegmatite region, that of Strzegom-Sobotka (formerly "Striegau"), Silesia, Poland, has produced good specimens of octahedral pink fluorite in crystals exceptionally to 15 cm on edge, associated with good crystals of quartz, microcline, albite, stilbite and chabazite (Praszkier and Siuda, 2008).