Zur Neuuntersuchung des Phasendiagramms InI—SnI2

Redetermination of the Phase Diagram InI—SnI₂ The phase diagram of the system InI—SnI₂ was redetermined with DTA and X-ray methods. We found that the compound given in the literature by the formula In₄SnI₆ is not formed. Instead of this a phase with lower InI content and having the composition In₃SnI₅ could be established, which crystallizes in three different low temperature polymorphs. This compound transforms to yet another, high temperature polymorph to 247^°C. Additionally a ternary compound with the formula Insn₂I₅ could be observed in the system InI—SnI₂, which has the tetragonal NH₄Pb₂Br₅ structure.