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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 61, Iss. 10 — Oct. 1, 1971
  • pp: 1325–1329

Optical Absorption of Natural Garnets from 1000 to 30 000 Wavenumbers

GLEN A. SLACK and R. M. CHRENKO  »View Author Affiliations


JOSA, Vol. 61, Issue 10, pp. 1325-1329 (1971)
http://dx.doi.org/10.1364/JOSA.61.001325


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Abstract

The optical absorption coefficient of five different natural garnet crystals has been measured at 300 K over the wavenumber range from 1000 to 30 000 cm-1. Peaks in the absorption spectrum associated with OH, Fe2+, Fe3+, Mn2+ and Cr3+ ions have been identified. Pure Mg3Al2Si3O12 and Ca3Al2Si3O12 appear to have an intrinsic absorption coefficient below 1 cm-1 in the wavenumber range 3000–30 000 cm-1. There are intrinsic multiphonon lattice peaks at wavenumbers of about 1790 and 2600 cm-1 in all five garnets.

Citation
GLEN A. SLACK and R. M. CHRENKO, "Optical Absorption of Natural Garnets from 1000 to 30 000 Wavenumbers," J. Opt. Soc. Am. 61, 1325-1329 (1971)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-61-10-1325

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