RIETVELD REFINEMENT RESULTS ON 3 NONSTOICHIOMETRIC MONOCLINIC NASICONS Academic Article

abstract

• The results of three powder Rietveld refinements of monoclinic NASICONs, prepared by different methods, are examined. Neutron TOF data were collected on two samples: a sol-gel prepared NASICON was found to have the formula Na3Zr1.93Si2PO11.86 and a reheated commercially available NASICON a formula of Na3.17Zr1.93Si1.9P1.1O12. Following our neutron study on a nonstoichiometric hydrothermally prepared NASICON we prepared the same nonstoichiometric phase by sol-gel methods and X-ray Rietveld analysis yielded the formula Na3.2Zr1.68Si1.84P1.16O11.54. These stoichiometries can be represented by the general formula Na1+4y+xZr2-y-zSixO12-2z where z represents the ZrO2 mole deficiency and y the amount of Zr4+ vacancies compensated by 4Na+. These differences in stoichiometry are accompanied by structural differences such as Si/P segregation and variations in cavity occupancy by Na+. It is proposed that the method of preparation is largely responsible for the observed differences. 1986.

authors

• Clearfield, Abraham

published proceedings

• SOLID STATE IONICS

author list (cited authors)

• RUDOLF, P. R., CLEARFIELD, A., & JORGENSEN, J. D.

citation count

• 20

complete list of authors

• RUDOLF, PR||CLEARFIELD, A||JORGENSEN, JD

publication date

• October 1986

publisher

• Elsevier  Publisher

published in

• Solid State Ionics  Journal

Digital Object Identifier (DOI)

• 10.1016/0167-2738(86)90075-5

start page

• 213

end page

• 224

volume

• 21

issue

• 3

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2F0167-2738%2886%2990075-5