Characterization of iron oxide minerals by second-derivative visible spectroscopy.

C. S. Kosmas, N. Curi, R. B. Bryant, D. P. Franzmeier

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

The second derivative of the spectral curve relating absorption and wavelength greatly enhances minor convexities and concavities of the original spectrum, and gives a much narrower band width, which provides improved resolution of subtle or overlapping bands. Synthetic goethite and hematite have distinctive second-derivative patterns. The minimum at 423 nm and the maximum at 447 nm in the second-derivative patterns were used to estimate the amount of goethite in a mixture with kaolinite. Whole soil samples can be analysed without pretreatment by this method, which means that the result of the analysis is a property of the soil itself and not possibly an artefact of the pretreatment.-D.J.M.

Original languageEnglish (US)
Pages (from-to)401-405
Number of pages5
JournalSoil Science Society of America Journal
Volume48
Issue number2
DOIs
StatePublished - Jan 1 1984

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oxide, hydroxide, and oxyhydroxide minerals
ultraviolet-visible spectroscopy
iron oxides
goethite
iron oxide
chemical derivatives
spectroscopy
mineral
pretreatment
hematite
kaolinite
artifact
soil
wavelength
wavelengths
soil properties
soil sampling
methodology
analysis
method

All Science Journal Classification (ASJC) codes

  • Soil Science

Cite this

Kosmas, C. S. ; Curi, N. ; Bryant, R. B. ; Franzmeier, D. P. / Characterization of iron oxide minerals by second-derivative visible spectroscopy. In: Soil Science Society of America Journal. 1984 ; Vol. 48, No. 2. pp. 401-405.
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Characterization of iron oxide minerals by second-derivative visible spectroscopy. / Kosmas, C. S.; Curi, N.; Bryant, R. B.; Franzmeier, D. P.

In: Soil Science Society of America Journal, Vol. 48, No. 2, 01.01.1984, p. 401-405.

Research output: Contribution to journalArticle

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