✦ LIBER ✦

On charge density determinations in intermetallics by quantitative convergent beam electron diffraction

✍ Scribed by J.A Horton; Z.L Wang; H.L Fraser; R Beanland

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 245 KB
Volume: 152
Category: Article
ISSN: 0921-5093
DOI: 10.1016/0921-5093(92)90072-9

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✦ Synopsis

Experimental measurements of the charge distribution in intermetallics would be both a useful confirmation of calculated charge density maps and a great aid in explaining the inherent brittleness of many intermetallics, especially the cubic trialuminides. Bonding charge densities were previously measured in GaAs by a convergent beam electron diffraction (CBED) technique in a transmission electron microscope operated at 100 kV. By electronically recording an energy filtered CBED pattern and comparing this measured rocking curve to a calculated one, an accurate electron scattering factor of the crystal can be determined. While the technique utilizes readily available equipment, a number of experimental difficulties remain.

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