Component interactions in the Cs2CdBr4-Cs2ZnBr4-CsBr ternary system

Component interactions in the Cs2CdBr4-Cs2ZnBr4-CsBr ternary system have been studied by differential thermal analysis and X-ray powder diffraction. The liquidus surface is comprised of three crystallization fields: CsBr, a solid solution of Cs2CdBr4 with Cs2ZnBr4 (α), and a Cs3ZnBr5-based solid solution (β). The ternary eutectic coordinates are as follows: ∼53.5 mol % Cs2CdBr4, 1.5 mol % Cs2ZnBr4, 45 mol % CsBr, and ∼450°C. A Cs2CdBr4-Cs3ZnBr5 triangulating section, which is characterized by peritectic interaction with peritectic (p) coordinates of 20 mol % Cs3ZnBr5 and 480°C, divides the Cs2CdBr4-Cs2ZnBr4-CsBr ternary system into two ternary systems: Cs2CdBr4-CsBr-Cs3ZnBr5 and Cs2CdBr4-Cs3ZnBr5-Cs2ZnBr4.