Electron irradiation effects in (Cs,Ba)-hollandites

L. A. Bursill, David Smith

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

High-resolution electron microscopy examination of mixed (Cs,Ba)-hollandites reveals evidence for significant short-range order in the distribution of cation vacancies in the incompletely occupied tunnels. The structure was observed to be quite unstable under 400-keV electron irradiation after only a few minutes' study at a dose rate of ca. 104 electrons Å-2 sec-1. Transformations to a microtwinned phase having interaxial angles of 80°/110° rather than 90°, and finally to an amorphous substance, were directly observed and recorded using video techniques. It is evident that hollandites are structurally, chemically, and mechanically unstable under intense electron irradiation. The significance of these observations to the possible effects of self-irradiation in SYNROC preparations, where radioactive 137Cs+1 transmites to 137Ba2+ by electron decay, is discussed.

Original languageEnglish (US)
Pages (from-to)343-354
Number of pages12
JournalJournal of Solid State Chemistry
Volume69
Issue number2
DOIs
StatePublished - 1987

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Electron irradiation
electron irradiation
Electrons
High resolution electron microscopy
Vacancies
tunnels
Cations
electron microscopy
Tunnels
electrons
examination
Positive ions
Irradiation
cations
dosage
preparation
irradiation
high resolution
decay

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Electron irradiation effects in (Cs,Ba)-hollandites. / Bursill, L. A.; Smith, David.

In: Journal of Solid State Chemistry, Vol. 69, No. 2, 1987, p. 343-354.

Research output: Contribution to journalArticle

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