NOT KNOWN DETAILS ABOUT FE²�?ZNS CRYSTAL

KLuS 2 solitary crystal samples undoped and doped having a minimal (5 %) or high (38 %) focus of trivalent thulium or ytterbium ions had been synthesized in the form of skinny hexagonal plates. The small phonon Strength (�?20 cm ⁻�?) was confirmed making use of Raman spectroscopy. Samples were studied also by utilizing optical absorption and