✦ LIBER ✦

The origins of the colours of yellow, green and blue sapphires

✍ Scribed by J. Ferguson; P.E. Fielding

Publisher: Elsevier Science
Year: 1971
Tongue: English
Weight: 314 KB
Volume: 10
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(71)80282-8

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✦ Synopsis

The abkption jpectra of natural yellow sapphires are shown to be due to single Fe"+and Fe" -O'--Fe'+ pairs, with the latter dominant. Blue and green sapphires have spectra dominated by Fe'+ -O'--Ti4+ and Fea* -O'--Fe'+ pairs.

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