Phase transitions in Rb2 BI4 (B=Mn, Fe)

Abstract We performed crystal growth of two iodide compounds, Rb2FeI4 and Rb2MnI4 by Bridgman method. In Rb2FeI4, a first-order transition point around 400K was found. In Rb2MnI4 other than the α–β transition around 500K already reported, one phase transition point at 105K in the a-modification and two phase transition points at 190K and 515K in the β-modification were found.