Relationship between Colours of Ochre from Roussillon and Content of Iron-Bearing Minerals

Details Relationship between Colours of Ochre from Roussillon and Content of Iron-Bearing Minerals Relationship between Colours of Ochre from Roussillon and Content of Iron-Bearing Minerals

2010-03-03

arxiv.org/abs/1003.0760v1

Appl. Clay Sci., 51, 54 (2011)

Physics

Condensed Matter

Materials Science

Scientific paper

Nine samples of ochre originating from the Sentier des Ocres near Roussillon, France, were studied with Mossbauer spectroscopy and Spectro-photo-colorimetry. The former yielded a quantitative phase analysis of iron containing minerals (goethite, hematite and kaolin), and the latter enabled determination of the CIE-L*a*b* colorimetric coefficients. Based on the results obtained it is shown that both a* and b* coordinates are responsible for the colour of the investigated ochres.

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