NOT KNOWN DETAILS ABOUT FE²�?ZNS CRYSTAL

KLuS 2 one crystal samples undoped and doped which has a reduced (5 %) or higher (38 %) focus of trivalent thulium or ytterbium ions had been synthesized in the shape of slender hexagonal plates. The minimal phonon Strength (�?20 cm ⁻�?) was verified applying Raman spectroscopy. Samples were being analyzed also by utilizing optical absorption