Rietveld neutron powder profile analysis and electrical conductivity of the fast silver-ion conductor (LaO)AgS

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Lanthanum silver oxysulfide, (LaO)AgS, exhibits a predominantly ionic conductivity of 10{sup {minus}3} to 10{sup {minus}1} S/cm between 300 K and 770 K. The tetragonal structure consists of alternating (LaO) and (AgS) sheets, their sequence being O-La-S-Ag-S-La-O. The structure suggests that ionic transport arises from migration of silver ions within the AgS layers analogous to sodium ion transport in Na-{beta}-alumina. Neutron powder diffraction data measured at five temperatures between 300 K and 770 K are analyzed using the Rietveld method to determine the distribution and thermal vibration parameters of the mobile silver ions. The structural investigation is accompanied by measurements of ... continued below

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9 p.

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Wilmer, D.; Wuensch, B. J. & Jorgensen, J. D. November 18, 1999.

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Lanthanum silver oxysulfide, (LaO)AgS, exhibits a predominantly ionic conductivity of 10{sup {minus}3} to 10{sup {minus}1} S/cm between 300 K and 770 K. The tetragonal structure consists of alternating (LaO) and (AgS) sheets, their sequence being O-La-S-Ag-S-La-O. The structure suggests that ionic transport arises from migration of silver ions within the AgS layers analogous to sodium ion transport in Na-{beta}-alumina. Neutron powder diffraction data measured at five temperatures between 300 K and 770 K are analyzed using the Rietveld method to determine the distribution and thermal vibration parameters of the mobile silver ions. The structural investigation is accompanied by measurements of the total conductivity in the same temperature range in order to resolve severe discrepancies in the literature data.

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9 p.

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OSTI as DE00750582

Medium: P; Size: 9 pages

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  • MRS '99 Fall Meeting, Boston, MA (US), 11/29/1999--12/03/1999

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  • Report No.: ANL/MSD/CP-100438
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 750582
  • Archival Resource Key: ark:/67531/metadc709881

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  • November 18, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 11, 2017, 9:04 p.m.

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Wilmer, D.; Wuensch, B. J. & Jorgensen, J. D. Rietveld neutron powder profile analysis and electrical conductivity of the fast silver-ion conductor (LaO)AgS, article, November 18, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc709881/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.