Phase transitions in i-butylammonium halogenoantimonate(III) and bismuthate(III) crystals

Diethylenetriaminium(3+) hexachlorobismuthate(III)

“…Ammonium chlorobismuthates(III) were first reported in 1982 (Remy & Pellens, 1928); such compounds are still of current interest owing to their ability to undergo phase transformations (Jakubas et al, 1997;Zarychta et al, 2004). Among the ammonium hexachlorobismuthates that have been crystallographically authenticated are the tris (dimethylammonium) hexachlorobismuthate-dimethylammonium chloride co-crystal (Herdtweck & Kreusel, 1993), tris-(diethylammonium) hexachlorobismuthate (Lazarini, 1987;Jarraya et al, 1993), sesqui(ethylenediammonium)hexachlorobismuthate dihydrate (Davidovich et al, 1996) and the tri (pyridinium) hexachlorobismuthate-potassium hexachlorobismuthate co-crystal (Zhang & Fang, 2004).…”

Ferroelectric properties and Raman spectroscopy of the [(C4H9)4N]3Bi2Cl9 compound

“…9,10 The phase transitions are usually connected with an appearance of interesting physical properties such as ferroelectricity and ferroelasticity, etc. [11][12][13] Thus, the paraferroelectric phase transitions are characterized by an "orderdisorder" mechanism related to the dynamical reorientation of the alkyl cation's chains. [14][15][16][17] This motion is substantially diminished on lowering temperature yielding ordered phases.…”