Channels, determining crystallographic direction

More recently, essentially the same technique as proposed by Hermann et al. [944,945], viz. FTIR microscopy (Fourier transform micro-IR spectroscopy on single crystals), and by Mirth and Lercher [815], was successfully employed by Zhobolenko and Dwyer [949], who determined the transport diffusivities of a number of hydrocarbons (benzene, toluene, p-xylene, cyclohexane) in sili-calite-1 in different crystallographic directions. No significant differences of the diffusivities in the straight and sinusoidal channels of the structure were found (cf. Fig. 54), at remarkable variance to results reported by Rees et al., who used the frequency response technique [950] and found significant differences for the diffusion coefficients in both types of channels, viz. one order of magnitude smaller ones for the sinusoidal than for the straight channels. 

---