Hostname: page-component-77c89778f8-5wvtr Total loading time: 0 Render date: 2024-07-22T19:19:24.947Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Basta, (E.), 1960. Neues Jahrb. Miner. Abh. 94, 1017-48.Google Scholar
Brett, (R.), 1964. Econ. Geol. 59, 1241-69.CrossRefGoogle Scholar
Cameron, (E. N.), 1970. Proc. Apollo II Lunar Sc. Conf. 1, 221-45.Google Scholar
Cervelle, (B.), 1967. Bull. Bur. Reeh. Géol. Minières, 1967, no. 6, 1-26.Google Scholar
Demirsoy, (S.), 1968. Untersuchungen über den einfluss der chemischen Zusammensetzung auf die spektralen Reflexionsfunktionen und Mikroeindruckhärten:—Im Spinell-Dreistoffsystem unter besonderer Beriicksichtigung tier Chromspinelle—Im System FeS2-NiS2-CoS2 an Zonen eines natiirlichen Bravoit-Kristalls. Ph.D. Thesis, Aachen (Germany).Google Scholar
Galopin, (R.) and Henry, (N. F. M.), 1972. Microscopic Study of the Opaque Minerals. Cambridge (Heifers).Google Scholar
Piller, (H.), 1967. Min. Mag. 36, 242-59.Google Scholar
Piller, (H.), 1972. Min. and Materials News Bull. for Quant. Micr. Methods. 1972, 4.Google Scholar
Piller, (H.), and Gehlen, (K.), 1964. Amer. Min. 49, 867-82.Google Scholar
Prévot, (M.) and Mergoil, (J.), 1973. Min. Mag. 39, 474-81.CrossRefGoogle Scholar
Ramdohr, (P.), 1953. Econ. Geol. 48, 677-88.CrossRefGoogle Scholar
Samuels, (L. E.), 1967. Metallographic polishing by mechanical methods. Melbourne and London (Pitman).Google Scholar
Vincent, (E. A.), Wright, (J. B.), Chevallier, (R.), and Mathieu, (S.), 1957. Min. Mag. 31, 624-55.Google Scholar