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Proceedings Paper

Optical spectroscopy and high pressure on emeralds: synthetic and natural
Author(s): M. A. Sánchez-Alejo; J. M. Hernández-Alcántara; C. Flores Jiménez; T. Calderón; H. Murrieta S.; E. Camarillo García
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Paper Abstract

Emerald, natural and synthetic, are the subject of study by means of optical spectroscopy techniques. Particularly, natural emeralds have been considered as a gemstone in jewelry not being so the synthetic ones. But, in general, the properties of these are very good for applications, for instance as a laser system, due to the impurities control. In this work a comparison between natural and synthetic emeralds is done. Chromium ions are the main responsible of the characteristic fascinating green color of these gemstones, entering in the crystals in octahedral sites. Absorption at room temperature show up two broad bands in the visible region and two narrow bands called the R-lines. That spectrum corresponds to trivalent chromium ions in an octahedral site, as it happens in ruby and alexandrite. On other hand, photoemission arises in the range 640-850 nm. at room temperature . It is shown that the luminescence spectra changes as the temperature is lowered. The effect on the main peak of luminescence when high pressure is applied on small samples of emerald shows as a linear function.

Paper Details

Date Published: 2 November 2011
PDF: 6 pages
Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 801142 (2 November 2011); doi: 10.1117/12.903421
Show Author Affiliations
M. A. Sánchez-Alejo, Univ. Nacional Autónoma de México (Mexico)
J. M. Hernández-Alcántara, Univ. Nacional Autónoma de México (Mexico)
C. Flores Jiménez, Univ. Nacional Autónoma de México (Mexico)
T. Calderón, Univ. Autónoma de Madrid (Spain)
H. Murrieta S., Univ. Nacional Autónoma de México (Mexico)
E. Camarillo García, Univ. Nacional Autónoma de México (Mexico)

Published in SPIE Proceedings Vol. 8011:
22nd Congress of the International Commission for Optics: Light for the Development of the World
Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Rufino Díaz-Uribe; Rufino Díaz-Uribe; Rufino Díaz-Uribe, Editor(s)

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