๐”– Bobbio Scriptorium
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About the blue and green colours in natural fluorapatite

โœ Scribed by H. B. Ribeiro; K. J. Guedes; M. V. B. Pinheiro; S. Greulich-Weber; K. Krambrock

Book ID
104557065
Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
114 KB
Volume
2
Category
Article
ISSN
1862-6351

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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.