Sub- and supersolidus phase relations of formamidinium-cesium polyiodides.

[Display omitted] It has been demonstrated that formamidinium–cesium polyiodides are facile reagents for converting metallic lead into perovskite at temperatures of 20–90 °C. For the first time, a tentative phase diagram of the [HC(NH 2) 2 ]I–I 2 binary system was proposed, and sub- and supersolidus phase relations in the [HC(NH 2) 2 ]I–CsI–I 2 ternary system were discussed. [ABSTRACT FROM AUTHOR]