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IJPAP Vol.49(08) [August 2011] >


Title: Synthesis, crystal structure and characterization of Na2.02Ag5.98[GaSiO4]6(NO2)2 and Na3.12K4.88[GaSiO4]6(NO2)2 sodalites
Authors: Borhade, A V
Wakchaure, S G
Keywords: Gallosilicate
Nitrite derivatives
Reitveld refinement
UV-DRS
Issue Date: Aug-2011
Publisher: NISCAIR-CSIR, India
Abstract: Partially exchanged silver and potassium derivatives of Na8[GaSiO4]6(NO2)2 sodalite, Na2.02Ag5.98[GaSiO4]6(NO2)2 and Na3.12K4.88[GaSiO4]6(NO2)2, have been studied. The nitrite sodalite of the composition, Na8[GaSiO4]6(NO2)2 was prepared at low temperature by hydrothermal technique and the derivatives Na2.02Ag5.98[GaSiO4]6(NO2)2 and Na3.12K4.88[GaSiO4]6(NO2)2, were obtained by cation exchange method at 373 K. These products crystallize with the cubic sodalite structure in the space group P43n and profile refinement of powder X-ray data has been completed. The products obtained were studied by different investigative techniques like IR spectroscopy, X-ray powder diffraction, UV-DRS and SEM. FTIR study shows shift in absorption frequency for the exchange of silver and potassium derivatives. The unit cell parameters (a) are found to be 8.9328, 8.9838 and 9.0409 Å for silver, sodium and potassium sodalites, respectively, while the bond distances and bond angles are modified considerably. UV-DRS study shows shift in bands and change in band gap energy of these sodalite derivatives. SEM shows surface morphology of these sodalites.
Page(s): 563-567
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.49(08) [August 2011]

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