Low silica zeolites are synthesized generally by sol-gel method in water. In this study, efforts were made to prepare low silica zeolites from sodium aluminate and sodium silicate, in the presence of alcohols, at 373 K under an atmospheric pressure. It was of our special interest to investigate how the addition of various alcohols into water affects the type of zeolites synthesized during cryst...

Introduction: Ca-Fe and alkali-halide alteration of CAIs is often attributed to aqueous alteration by fluids circulating on asteroidal parent bodies after the various chondritic components have been assembled, although debate continues about the roles of asteroidal vs. nebular modification processes [1-7]. Here we report detailed observations of alteration products in a large Type B2 CAI, TS4 f...

One-part geopolymers were synthesized from two different silica materials (a silica-rich residue from chlorosilane production and a commercial microsilica) and sodium aluminate at three different SiO2/Al2O3 ratios and a nominal water/solids ratio of 0.5. The degree of reaction of the silica in the cured geopolymers (i.e. the fraction of silica dissolved to form aluminosilicates and minor produc...

The main goal of this work was to synthesize and evaluate the effect of dehydration temperature on the potential application of hydroxy sodalite zeolite membrane. Hydroxy sodalite zeolite membranes were synthesized via direct hydrothermal method onto a tubular alumina support without seeding in a hot air oven. The synthesized membranes were characterized by X-ray diffraction (XRD) and scanning ...

Abstract Crystallographic distortions in the alternating aluminium and silicon tetrahedral framework of sodalite (Na 8 Al 6 Si O 24 Cl 2 ), beryllium helvine (Mn Be S (framework designated SOD) are described terms a set condensed normal mode amplitudes phases derived from an ideal tetrahedron theoretical aristotype phase. For sodalite-structured hettotype phase space group $P{\overline 4} 3n$ ,...