Micro-spectroscopy shedding light on rock

VOL. 17 NO. 3 (2005) 24 SPECTROSCOPY EUROPE

Whilst there are many imaging techniques
available to a research scientist,
the information which is provided
is often only of a visual/topographical
nature. What they fail to provide is true
compositional (chemical/elemental)
analysis of the materials. However, microspectroscopic
techniques such as Raman
or X-ray fluorescence (XRF) can fill this
gap, allowing highly detailed images to
be generated based upon the samples
material composition.
The information the two techniques
provide are quite different, but their application
areas are strongly linked. Raman
probes chemical bonding within a material
using laser radiation, giving information
on molecular functional groups,
whilst XRF probes elemental composition
by analysing fluorescence X-rays emitted
following irradiation with a primary X-ray
beam.
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