has a variable morphology, reaching up to 800 [micro]m.
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.
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 .
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.
The zeolite family includes mordenite, clinoptilolite, faujasite, chabazite
, heulandite, and mazzite.
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).