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Cited by 543

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Atomic number and crystallographic contrast images with the SEM: a review of backscattered electron techniques

Lloyd, Geoffrey E.·1987·Mineralogical Magazine

Abstract

Backscattered electrons (BSE) are incident electrons reflected back from a target specimen and imaged with the scanning electron microscope (SEM). Three distinct BSE signals exist: atomic number or Z-contrast, in which composition determines image contrast; orientation contrast, in which specimen crystal structure determines image contrast; and electron channelling patterns (ECP), which are unique for a particular crystal orientation. The origins of these three signals are described, with particular attention being given to the necessary SEM operational and specimen preparation requirements. Z-contrast images are relatively simple to obtain and also have a familiar appearance such that their usage should become commonplace. ECP in comparison require subsequent interpretation which depends on the crystal structure and the relationship between crystal and specimen coordinate systems. A general solution to ECP interpretation is therefore presented, involving the construction of reference ‘ECP-maps’ over the surface of a sphere. A brief summary of the applications and potential use of the three BSE signals in the geological sciences is also given.

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Metadata

Authors
Lloyd, G. E.
Venue
Mineralogical Magazine
Published
1987-03
Volume
51
Issue
359
Pages
3-19
ISSN
  • 0026-461X (ISSN-L)
  • 1471-8022
OpenAlex
W2054360246
Cited by
543
References
6
FWCI
4.36
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Atomic number and crystallographic contrast images with the SEM: a review of backscattered electron techniques. https://app.cochat.ai/papers/10.1180/minmag.1987.051.359.02
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Lloyd, G. E. (1987). Atomic number and crystallographic contrast images with the SEM: a review of backscattered electron techniques. Mineralogical Magazine. https://doi.org/10.1180/minmag.1987.051.359.02

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