HgBr2-CsPbBr3 and CsHgBr3-PbBr2 joins of the HgBr2-PbBr2-CsBr system

The HgBr2-CsPbBr3 (1) and CsHgBr3-PbBr2 (2) joins of the HgBr2-PbBr2-CsBr system are studied using differential thermal analysis (DTA) and X-ray powder diffraction. Both joins are non-quasi-binary. The primary phase fields, joint crystallization fields, and invariant temperatures are determined along these joins. X-ray powder diffraction results validate the diagrams mapped for these joins.