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  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > May  >
In the Laboratory
Measurement of the Index of Refraction of Solids by UV-Vis Spectroscopy

Brian J. Bozlee
Department of Chemistry, Hawaii Pacific University, Kaneohe, HI 96744-5297

Gregory J. Exharos
Pacific Northwest National Laboratory, Richland, WA 99352-1611

Aida E. Jimenez
University of Great Falls, Great Falls, MT 59405

Simone L. van Swam
Northwestern University, Evanston, IL 30208
Cover
May 2002
Vol. 79 No. 5
p. 619
Abstract
In this laboratory exercise, the dispersion curve of CaF2 (i.e., refractive index as a function of wavelength) was determined by temperature-dependent UV-vis spectroscopy of solid CaF2 powder intercalated by liquid hexadecane. The relative error between the literature and the experimental values for the index of refraction of CaF2 was about 1‰ at most visible wavelengths. This exercise introduces students to a novel spectroscopic method for refractive index measurement and illustrates the variation in refractive index of a typical solid over the visible wavelength region.
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Instructions for students and notes for the instructor are available.
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*  Citation
 Bozlee, Brian J.; Exharos, Gregory J.; Jimenez, Aida; van Swam, Simone L. J. Chem. Educ. 2002 79 619.
*  Keywords
 Laboratory Instruction; Physical Chemistry; Solids; UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 April 1, 2002
March 16, 2005
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