Electron Microprobe and Optical Absorption Study of Colored Kyanites

The characteristic blue color of the mineral kyanite is shown to be caused by traces of Ti$^{+++}$ in the range of a few parts per million. Evidence from the intensity and position of optical absorption bands indicates that the unusually intense color probably arises from electron delocalization int...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1967-11, Vol.158 (3803), p.915-917
Main Authors: White, Eugene W., White, William B.
Format: Article
Language:English
Subjects:
Absorption spectra
Colors
Crystals
Electromagnetic absorption
Electron emission
Electrons
Emission spectra
Kyanite
Minerals
Titanium
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Summary:The characteristic blue color of the mineral kyanite is shown to be caused by traces of Ti$^{+++}$ in the range of a few parts per million. Evidence from the intensity and position of optical absorption bands indicates that the unusually intense color probably arises from electron delocalization into narrow d-bands.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.158.3803.915