International
Tables for
Crystallography
Volume C
Mathematical, physical and chemical tables
Edited by E. Prince

© International Union of Crystallography 2006
International Tables for Crystallography (2006). Vol. C. ch. 4.3, p. 400

Figure 4.3.4.16 

C. Colliexa
[Figure 4.3.4.16]
Figure 4.3.4.16

Dielectric and optical functions calculated in the Drude model of a free-electron gas with ħωp = 16 eV and τ = 1.64 × 10−16 s. R is the optical reflection coefficient in normal incidence, i.e. R = [(n − 1)2 + k2]/(n + 1)2 + k2] with n and k the real and imaginary parts of [\sqrt{\epsilon}]. The effective numbers [n_{\rm eff}(\varepsilon_{2})] and [n_{\rm eff}[{\rm Im}(-1/\varepsilon)]] are defined in Subsection 4.3.4.5[link] [courtesy of Daniels et al. (1970[link])].