Zeolites are present in numerous outcrops of volcanites different ages Sicily (Italy). Some these important because they constitute the ideal genesis conditions some minerals, which represent geological indicators chemical and geothermal gradients involved during their formation. For this purpose, a group zeolites coming from areas Ionian coast Palagonia village (Eastern Sicily) was investigate...

We report synthetic protocols and guiding principles inspired by mechanistic considerations for the synthesis of crystalline microporous solids via interzeolite transformations that avoid direct intervention by organic structure-directing agents. These protocols are specifically implemented to synthesize highsilica MFI (ZSM-5), CHA (chabazite), STF (SSZ-35), and MTW (ZSM-12) zeolites from FAU (...

Merelaniite is a new mineral from the tanzanite gem mines near Merelani, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania. It occurs sporadically as metallic dark gray cylindrical whiskers that are typically tens of micrometers in diameter and up to a millimeter long, although a few whiskers up to 12 mm long have been observed. The most commonly associated minerals include zoisi...

The conversion of methane to methanol over zeolitic a-oxygen sites has been demonstrated using Fe-ZSM-5. To discriminate between monoand poly-nuclear active sites, we prepared the [Fe]-ZEO with iron in the ZEOlite lattice via direct synthesis and Fex-ZEO, by dispersion of x wt.% iron on the ZEOlite. Shape-selective formation of nano-clusters of iron oxides with various sizes is realized inside ...

Four naturally occurring zeolites were examined to verify their assignments as chabazites AZLB-Ca and AZLB-Na (Bowie, Arizona) clinoptilolites NM-Ca (Winston, New Mexico) NV-Na (Ash Meadows, Nevada). Based on powder X-ray diffraction, was discovered be mostly quartz with some clinoptilolite residues. Treatment concentrated HCl (12.1 M) acid resulted in AZLB-Na, the chabazite-like species, becom...

Excessive use of nitrogen fertilizer and inappropriate fertilization designs have negative results in agricultural ecosystems, such as considerable losses through dioxide (NO2) soil leaching ammonia NH3 volatilization. In addition, climate change, with rising summer temperatures reduced precipitation, leads to production declines water shortages the soil. This review aims highlight characterist...