CaltechAUTHORS
Published January 1986 | Version public
Journal Article Metadata-only

A spectroscopic study of blue radiation coloring in plagioclase

Creators

Abstract

Blue color in sodic plagioclase is produced by electronic transitions of Pb in a manner similar to the mechanism causing color in amazonite (potassium feldspar colored blue-green by Pb electronic transitions). The two blue feldspar varieties have the following characteristics in common: (1) elevated Pb concentrations (usually greater than 0.01 wt.%), (2) structurally incorporated H^+, (3) similar response of the color to heating and irradiation, and (a) similar band shape, position, and polarization in the optical spectrum.

Additional Information

© 1986 Mineralogical Society of America. Manuscript received, May 29, 1984; Accepted for publication, September 9, 1985. This work was supported in part by NSF grant EAR-79-19987. We thank C. Bridges (Nairobi), C. Francis (Harvard), W. Larson (Pala International), and J. White (Smithsonian Institution) for providing samples; C. Martin, D. Blair, and S. Chan (Caltech) for advice with EPR spectroscopy; and Eric Dowty (American Museum of Natural History), Kurt Nassau (Bell Laboratories), and Martha Schaefer (Geophysical Laboratory) for helpful comments on the manuscript.

Additional details

Identifiers

Eprint ID
38172
Resolver ID
CaltechAUTHORS:20130430-080221399

Funding

NSF
EAR-79-19987

Dates

Created
2013-05-01
Created from EPrint's datestamp field
Updated
2019-11-26
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Caltech Custom Metadata

Caltech groups
Division of Geological and Planetary Sciences (GPS)
Other Numbering System Name
Caltech Division of Geological and Planetary Sciences
Other Numbering System Identifier
4060