Abstract
WHEN beryllia flakes, supported on thin carbon films to form electron microscope specimens, are strongly irradiated with an electron beam, they disintegrate and small crystals condense on the surrounding carbon film. Willis, Austerman and Dearborn1 reported that the condensed material gives electron diffraction ring patterns which they identify as being those of the high-temperature β-BeO phase examined by Smith, Cline and Frechette2. These latter authors suggest that the β-phase is cubic, a0 = 4.76 Å, with a non-trivial structure. According to Austerman3, more recent work has suggested that the structure may be hexagonal or tetragonal.
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Willis, A. H., Austerman, S. B., and Dearborn, K., Nature, 202, 689 (1964).
Smith, D. K., Cline, C. F., and Frechette, V. D., J. Nuclear Mat., 6, 265 (1962).
Austerman, S. B., NAA–SR–7654 (1963).
See, for example, Hickman, B. S., Sabine, T. M., and Coyle, R. A., J. Nuclear Mat., 6, 190 (1962).
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COWLEY, J. Electron Diffraction Study of Evaporated Beryllia. Nature 204, 1082 (1964). https://doi.org/10.1038/2041082a0
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DOI: https://doi.org/10.1038/2041082a0
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