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Bradshaw, P. M. D. (1967) Measurement of the modal composition of a granitic rock powder by point-counting, infra-red spectroscopy, and X-ray diffraction. Mineralogical Magazine and Journal of the Mineralogical Society, 36 (277) 94-100 doi:10.1180/minmag.1967.036.277.15

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Reference TypeJournal (article/letter/editorial)
TitleMeasurement of the modal composition of a granitic rock powder by point-counting, infra-red spectroscopy, and X-ray diffraction
JournalMineralogical Magazine and Journal of the Mineralogical Society
AuthorsBradshaw, P. M. D.Author
Year1967 (March)Volume36
Issue277
PublisherMineralogical Society
Download URLhttps://rruff.info/doclib/MinMag/Volume_36/36-277-94.pdf+
DOIdoi:10.1180/minmag.1967.036.277.15Search in ResearchGate
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Mindat Ref. ID6041Long-form Identifiermindat:1:5:6041:1
GUID0
Full ReferenceBradshaw, P. M. D. (1967) Measurement of the modal composition of a granitic rock powder by point-counting, infra-red spectroscopy, and X-ray diffraction. Mineralogical Magazine and Journal of the Mineralogical Society, 36 (277) 94-100 doi:10.1180/minmag.1967.036.277.15
Plain TextBradshaw, P. M. D. (1967) Measurement of the modal composition of a granitic rock powder by point-counting, infra-red spectroscopy, and X-ray diffraction. Mineralogical Magazine and Journal of the Mineralogical Society, 36 (277) 94-100 doi:10.1180/minmag.1967.036.277.15
In(1966) Mineralogical Magazine Vol. 36 (277) Mineralogical Society
Abstract/NotesSummaryA rapid method for determining the mode of a four-component powder (microcline, orthoclase, plagioclase, and quartz) was sought to aid the interpretation of geochemical results. An accuracy of about ±5 % (absolute) was required. Three methods were tried : point counting proved too long as well as destroying the sample; infra-red spectroscopy was not sufficiently accurate for this particular type of rock powder; X-ray diffraction proved the most rapid and, although less accurate than point counting, was within acceptable limits and had the advantage of giving additional information about the composition of the feldspars.


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