Hydrothermal Synthesis and Characterization of Gallo-silicate Carbonate Cancrinite, Na8[GaSiO4]6(CO3)1.72(H2O)5

In this study, Gallosilicate cancrinite with carbonate anion, Na8[GaSiO4]6(CO3)1.72(H2O)5, has been synthesized at low temperature by hydrothermal method (373 K). Zeolites are aluminosilicate minerals that are extensively used in industrial applications including as commercial adsorbents and catalysts. The characterization of prepared Cancrinite (CAN) was done by IR, X-ray powder diffraction, TGA, SEM, and MAS NMR. The crystal structure was refined in the space group P63, from X-ray powder diffraction data using the Rietveld refinement method with a= 12.5899 Å, c= 5.1424 Å, Rwp = 0.0962, and Rp = 0.0709. The average Al-O bond distance is 1.8109 Å and the Si-O bond distance is 1.5847 Å, while the T-O-T angle is found to be 138.793o. TGA shows the thermal behavior of the carbonate anion inside the cancrinite cages. The single resonance line in the 29Si spectrum confirms the strictly alternating order of Ga and Si in the framework. The SEM picture shows hexagonal needle-shaped structures. The present study showed that Gallosilicate cancrinite can be synthesized at low temperatures by hydrothermal method (373 K). The cancrinite enclatherated with carbonate anion, Na8[GaSiO4]6(CO3)1.72(H2O)5 is obtained and studied successfully with different techniques like IR, X-ray powder diffraction, TGA, SEM, and MAS NMR.