Deciphering the Nature of 'Graphite' in Geological Samples  with the Use of Laser Raman Microprobe Spectroscopy
{'Code': '06030107', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'EAR', 'LongName': 'Division Of Earth Sciences'}}
{'SignBlockName': 'Felicia Fauntleroy', 'PO_EMAI': None, 'PO_PHON': None}
Although Raman spectroscopy long has been recognized in material                science and solid state physics as a powerful tool for the study                of carbonaceous materials (CM), it has barely been used to study                "graphite" in samples of geological interest.  The overall goal                 is to evaluate the usefulness of laser Raman microprobe (LRM)                   spectroscopy to characterize naturally occuring CM.  For the                    purpose of LRM analysis, several suites of progressively                        metamorphosed CM have been obtained, most of which already have                 undergone other analyses, such as by X-ray diffraction (XRD) and                transmission electron microscopy (TEM). The intention is to                     develop a routine LRM methodogy 1) to provide relatively rapid                  evaluation of the degree of crystallinity of "graphite" and its                 compositional deviations from pure carbon and 2) to be as                       quantitative as possible in characterizing the kind of carbon.                  The results will be important in understanding the history of                   carbon-bearing rock.
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{'Code': '1573', 'Text': 'Petrology and Geochemistry'}
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