Optical Properties of Potassium Erbium Double Tungstate KEr(WO4)2
POLISH ACADEMY OF SCIENCES WARSAW INSTOF PHYSICS
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Results of spectroscopic investigations of crystalline potassium-erbium double tungstate KErWO42 are reported. The single crystals of KErWO42 were grown by Top Seeded Solution Growth TSSG technique. They belong to the chain layered group of materials crystallizing in monoclinic syngony space group Csup 6 sub 2h-C2c. The investigations were carried out in the broad spectral and temperature range temperature range from 1.1K up to room temperature and the spectral range from 6000cm to 25000cm. It was found that the potassium erbium double tungstate belong to the class of the diaxial crystals and it is a pleochroic. The main optical absorption spectra are determined.
- Physical Chemistry