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IJEMS Vol.16(5) [October 2009] >


Title: Preparation, characterization and conductivity studies of NaAlSb(PO4)3 and HAlSb(PO4)3
Authors: Anantharamulu, N
Velchuri, Radha
Sarojini, T
Madhavi, K
Prasad, G
Vithal, M
Issue Date: Oct-2009
Publisher: CSIR
Abstract: NaAlSb(PO4)3 and HAlSb(PO4)3 are prepared by solid-state and metathesis reactions respectively. They are characterized by powder XRD, IR and solid-state 31P-MAS NMR spectroscopy. These two compounds crystallize in the hexagonal NASICON structure with the space group of RC. Their infrared spectra exhibit characteristic vibrational bands of PO4 tetrahedra. The 31P-MAS NMR spectra of NaAlSb(PO4)3 and HAlSb(PO4)3 are characterized by a symmetric single peak around 9 ppm suggesting only one type of phosphorous in the hexagonal lattice. The activation energies for conduction and relaxation are more for NaAlSb(PO4)3 compared to the values of HAlSb(PO4)3. The isothermal conductivity of NaAlSb(PO4)3 i s higher than the conductivity of HAlSb(PO4)3. The imaginary parts of the impedance, (Z'') and electric modulus (M'') against log frequency show single peaks in both Z''  and M'' spectra.
Page(s): 347-354
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Source:IJEMS Vol.16(5) [October 2009]

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