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Difference in spectral reflectivity between grains of homogeneous and exsolved titanomagnetite

Published online by Cambridge University Press:  05 July 2018

B. Halfen
B. Halfen*
Affiliation:
Department of Mineralogy and Petrology, Institute of Geology, University of Lund, Sölvegatan 13, S-223 62 Lund, Sweden
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Summary

The spectral reflectivities of homogeneous and exsolved titanomagnetites of the same chemical composition were measured in air and in oil. The reflectivities of the two kinds of titanomagnetite are closely similar in the blue part of the spectrum, but become increasingly different when proceeding towards the red end. The refractive indices (n) and the absorption coefficients (k) were calculated from the reflectivity values. The n-values of the two kinds of titanomagnetite show a pattern of separation similar to that of the reflectivity values. Regarding possible differences between the k-values no reliable conclusions could be drawn. Some possible explanations of the observed separations are discussed.

Type
Research Article
Information
Mineralogical Magazine , Volume 40 , Issue 316 , December 1976 , pp. 843 - 851
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1976

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