Abstract:
Recent discovery of colossal negative thermal expansion (NTE) behaviour in Silver
Hexacyanocobaltate Ag3[Co(CN)6] has triggered interest among researchers to understand the
basic mechanism causing such an unusual behaviour. This report presents our results on the
behaviour of Ag3[Co(CN)6] using in-situ high pressure Raman and FTIR spectroscopy. The
reported trigonal-monoclinic phase transition occurring in this compound is observed at 0.2
GPa. Upon increasing the pressure further, Ag3[Co(CN)6] becomes irreversibly amorphous
above 13 GPa.
