Interaction in the system
based on the Cs3Sb2Br9(I9)
and Cs2TeBr6(I6) compounds
Chem.
Met. Alloys 10 (2017)
113-119
https://doi.org/10.30970/cma10.0365
Ivanna Stercho, Artem
Pogodin, Oleksandr KoKhan, Igor Barchiy, Anatolii Fedorchuk,
Iwan Kityk,
Michal Piasecki
The physico-chemical
interactions in the system based on the compounds Cs3Sb2Br9,
Cs3Sb2I9, Cs2TeBr6, and
Cs2TeI6 were investigated by DTA, XRD and MSA, in
combination with mathematical modeling. Due to the formation of an unlimited
solid solution in the Cs2TeBr6–Cs2TeI6
system, the investigated multicomponent system is
presented as the Cs3Sb2Br9–Cs3Sb2I9–Cs2TeBr6–õIõ quasiternary system. The projection of the liquidus surface and an isothermal section (573 K) were
constructed. The Cs3Sb2Br9–Cs3Sb2I9–Cs2TeBr6–õIõ
system is of the invariant eutectic type. The crystal
structures of the Cs3Sb2Br9(I9)
and Cs2TeBr6(I6) ternary compounds were
determined and compared with related B-deficient
perovskite structures.
Liquidus surface projection of the Cs3Sb2Br9–Cs3Sb2I9–Cs2TeBr6–õIõ
system.
Keywords
Halide perovskite / Phase equilibria
/ Solid solution / Liquidus projection / Crystal
structure