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Kubelka-Munk theory

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Journal Article
Published: 01 October 2012
Clays and Clay Minerals (2012) 60 (5): 473–483.
...)oxides and the Fe present in the crystalline structure of kaolinite, especially when the Fe-bearing minerals occur in small quantities. Here, a new generic technique to quantify Fe (oxyhydr)oxides in kaolin, based on the Kubelka-Munk theory, is presented. A new interpretation of the theory was made...
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Journal Article
Published: 01 June 2003
Clays and Clay Minerals (2003) 51 (3): 309–317.
... and natural hematite samples. REFERENCES Barrón , V. and Torrent , J. ( 1984 ) Influence of aluminum substitution on the color of synthetic hematites . Clays and Clay Minerals , 32 , 157 – 158 . Barrón , V. and Torrent , J. ( 1986 ) Use of the Kubelka-Munk theory...
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Journal Article
Published: 01 November 2014
American Mineralogist (2014) 99 (11-12): 2280–2291.
... . Marine Geology , 89 , 299 – 314 . Barrón V. Torrent J. ( 1986 ) Use of the Kubelka-Munk theory to study the influence of iron oxides on soil colour . Journal of Soil Science , 37 , 499 – 510 . Bigham J.M. Golden D.C. Bowen L.H. Buol S.W. Weed S.B. ( 1978...
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Journal Article
Journal: Clay Minerals
Published: 01 March 2011
Clay Minerals (2011) 46 (1): 137–147.
... by using several sets of synthetic samples. We found that the position and amplitude of the characteristic absorption band of hematite (estimated from the first- and second-order derivative curves of the Kubelka-Munk remission function spectrum derived from the DRS) was significantly affected by the degree...
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Journal Article
Published: 01 January 2009
American Mineralogist (2009) 94 (1): 90–97.
... temperature. This means that the red color of hematite becomes black with temperature increase. The calculated absorption intensities (Kubelka-Munk functions) suggest that this temperature dependence of the hematite powder-reflectance spectra can be mainly explained by a change in band gap absorption edges...
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Journal Article
Published: 01 August 2012
Clays and Clay Minerals (2012) 60 (4): 442.
... and goethite concentrations in kaolin using diffuse reflectance spectroscopy: a new approach to Kubelka-Munk theory ...
Journal Article
Published: 01 September 2012
European Journal of Mineralogy (2012) 24 (5): 839–850.
... as “diffuse reflectance”, R ∞ , versus wavelength, λ. The resultant spectra were then transformed into a Kubelka-Munk function, FR = (1 − R ∞ ) 2 /2 × R ∞ , and plotted versus wavenumber ν [cm −1 ]. To obtain band parameters, i.e. band positions, full width at half maximum values and FR...
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Series: European Mineralogical Union Notes in Mineralogy, European Mineralogical Union Notes in Mineralogy
Published: 01 January 2010
DOI: 10.1180/EMU-notes.9.6
EISBN: 9780903056359
... of an infinitely thick sample relative to that of a non-absorbing standard (normally KBr or KCl), a is the absorptivity, c is the concentration and s is a scattering coefficient. In the NIR region the spectra contain very little of the specular component and so usually no Kubelka-Munk conversion...
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Journal Article
Published: 01 August 2014
American Mineralogist (2014) 99 (8-9): 1736–1745.
... reflectance (Perkin Elmer λ19 spectrophotometer, 400–4000 nm range, 0.1 nm step size, BaSO 4 integrating sphere, white reference material: BaSO 4 pellet). Reflectance (R ∞ ) was converted to absorbance (K/S) by the Kubelka-Munk equation ( Marfunin 1979 ): K/S = (1–R ∞ ) 2 ·(2R ∞ ) −1 . Absorbance bands were...
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Journal Article
Published: 01 April 2002
Clays and Clay Minerals (2002) 50 (2): 208–216.
... reassessment of brick red lutites: Evidence from reflectance spectrophotometry . Marine Geology , 89 , 299 – 314 . Barron , V. and Montealegre , L. ( 1986 ) Iron oxides and color of Triassic sediment: Application of the Kubelka-Munk theory . American Journal of Science , 286 , 792 – 802...
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Journal Article
Journal: Clay Minerals
Published: 01 December 2002
Clay Minerals (2002) 37 (4): 709–718.
... and Chemistry of Minerals , 11 , 37 – 51 . Barrón V. & Torrent J. ( 1986 ) Use of the KubelkaMunk theory to study the influence of iron oxides on soil colour . Journal of Soil Science , 37 , 499 – 510 . Bish D.L. ( 1993 ) Studies of clays and clay minerals using X-ray...
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Journal Article
Published: 01 October 2000
Clays and Clay Minerals (2000) 48 (5): 503–510.
... and PB98-1015. REFERENCES Barrón , V. and Torrent , J. ( 1986 ) Use of the Kubelka-Munk theory to study the influence of iron oxides on soil color . Journal of Soil Science , 37 , 499 – 510 . Barrón, V., Gálvez , N. , Hochella , M.F. , Jr. , and Torrent , J...
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Journal Article
Journal: Clay Minerals
Published: 01 June 2017
Clay Minerals (2017) 52 (2): 203–215.
... for degradation of methylene blue effluent: Synergistic effect and kinetic study . Ultrasonics Sonochemistry , 19 , 756 – 761 . Yang L. & Kruse B. ( 2004 ) Revised KubelkaMunk theory. I. Theory and application . Journal of the Optical Society of America , 21 , 1933 – 1941...
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Journal Article
Journal: Clay Minerals
Published: 01 June 2015
Clay Minerals (2015) 50 (2): 185–197.
... , 176 , 765 – 773 . Wang S.L. Wang P.C. ( 2007 ) In situ XRD and ATR-FTIR study on the molecular orientation of interlayer nitrate in Mg/Al layered double hydroxide in water . Colloids and Surfaces A , 292 , 131 . Yang L. Kruse B. ( 2004 ) Revised KubelkaMunk...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2008
Clay Minerals (2008) 43 (3): 381–391.
... amount of structural Fe (~0.7%), almost exclusively as Fe 3+ . This study was supported by a grant from FAPEMIG. The manuscript benefited from helpful reviews by R.J. Pruett and I.R. Wilson. REFERENCES Barrón V. & Torrent J. ( 1986 ) Use of the Kubelka-Munk theory...
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Journal Article
Journal: Clay Minerals
Published: 01 December 2002
Clay Minerals (2002) 37 (4): 583–590.
.... ( 1986 ) Use of the Kubelka-Munk theory to study the influence of iron oxides on soil colour . Journal of Soil Science , 37 , 499 – 510 . Brown I.W.M. , MacKenzie K.J.D. & Meinhold R.H. ( 1987 ) The thermal reactions of montmorillonite studied by high-resolution solid...
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Journal Article
Published: 01 February 2009
Clays and Clay Minerals (2009) 57 (1): 46–53.
... Barrón , V. and Torrent , J. ( 1986 ) Use of the Kubelka-Munk theory to study the influence of iron-oxides on soil color . Journal of Soil Science , 37 , 499 – 510 . Barrón , V. and Torrent , J. ( 2002 ) Evidence for a simple pathway to maghemite in Earth and Mars soils...
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Journal Article
Journal: Clay Minerals
Published: 01 March 2004
Clay Minerals (2004) 39 (1): 85–98.
... discussions during the preparation of this paper. REFERENCES Barrón V. & Torrent J. ( 1986 ) Use of the Kubelka-Munk theory to study the influence of iron oxides on soil colour . Journal of Soil Science , 37 , 499 – 510 . Campbell A.S. , Schwertmann U. &...
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Journal Article
Journal: Clay Minerals
Published: 01 March 2014
Clay Minerals (2014) 49 (1): 1–16.
... reflectance via Kubelka-Munk theory ( Kubelka & Munk, 1931 ; Kortum, 1969 ), is linear, demonstrating that optical crowding is not significant in this region. Above 10% the increase levels off as the particles begin to interfere with each other. A single formulation made at 18% volume fraction...
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Journal Article
Published: 01 August 2002
Clays and Clay Minerals (2002) 50 (4): 494–503.
...-Munk theory and the results are presented as remission function ( Calas, 1986 ). Finally, EPR was utilized to detect any isomorphic replacement of Al 3+ by Fe 3+ in the kaolinites and the presence of structural defects caused by radiation. Two types of signal were observed. The first, Fe II...
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