PbF₂–CdF₂–SrF₂ Ternary Solid Solution: Crystal Growth and Investigation

Abstract

Crystals based on alkaline earth metal difluorides are widely used optical materials. In this study, in order to expand the range of optical matrices, multicomponent Pb1−x−yCdxSryF2 (0.27 x y Fm-3m) were grown from melt using the vertical directional crystallization technique for the first time. The densities and refractive indices of the grown crystals vary depending on the quantitative content components (x and y) in the ranges of 6.6039(5)–7.5232(5) g/cm3 and 1.6403–1.7084, respectively. The optical transmission and electrochemical impedance spectra were studied. The homogenous composition regions of non-cellular crystallization of this ternary solid solution at a crystallization rate of 6 mm/h and an interface temperature gradient of 80 deg/cm were experimentally determined as 0.30 x y −5 S/cm at room temperature) for various applications.

Keywords

• multicomponent crystals
• solid solutions
• alkaline earth metal fluorides
• PbF₂
• CdF₂
• SrF₂