Figure 5.
SEM of zeolite tuffs from DonjeJesenje (a), VranjskaBanja (b), Brus (c) and Strezovce (d). Magnification of app. 20.000x was used in the measurements. Beside the typical plate-like morphology of clinoptilolite crystals, some fiber-like particles of mordenite could be also observed in all four samples.