Preparation, structure and scintillation of cesium hafnium chloride bromide crystals

We report on the preparation, structure and scintillation properties of single crystal cesium hafnium chloride bromide (Cs2HfCl4Br2 or CHCB). The crystals were grown using a vertical Bridgman technique process. Single crystal X-ray diffraction showed that the as grown CHCB crystal structure was isostructural to Cs2HfCl6 crystals exhibiting the cubic K2PtCl6 –type crystal structure. The Cs2HfCl6−x - Cs2HfBrx system is a solid solution with the lattice parameter of Cs2HfCl6−xBrx increasing linearly with x in the range 0