TY - JOUR
T1 - Electron irradiation effects in (Cs,Ba)-hollandites
AU - Bursill, L. A.
AU - Smith, David
N1 - Funding Information:
‘fhe work was wpportcd hy the Auslraliun Kcsurch Grants Committee. the LniverGty of Mclhournc. antI the NSF under Grant IIMK-8306501 to Ihc Facility (i,~ High-Kcudution Electron Microcopy in the C‘enkr for Solid Stale Scicncc. Arizona State llnivcrsity. WC are gratefld to Dr. Ed Muirhud t Mclhourne) and I’rofeswr J. M. Cowlcy (ASUI f’or support of visit3 1c) ASIJ (hy I..A.l3.) and IO Mclhournc (hy I1.J.S.).
PY - 1987/8
Y1 - 1987/8
N2 - 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.
AB - 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.
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U2 - 10.1016/0022-4596(87)90092-2
DO - 10.1016/0022-4596(87)90092-2
M3 - Article
AN - SCOPUS:0023399378
SN - 0022-4596
VL - 69
SP - 343
EP - 354
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
IS - 2
ER -