Pressure Induced Rhombohedral Phase in ScF3 shows Enhanced Negative Thermal Expansion

Negative thermal expansion (NTE) is a counterintuitive phenomenon, in which materials undergo contraction as they are heated. ScF3, a well-known NTE material has been reported to show NTE coefficients up-to 1000K. At ambient conditions, ScF3 crystallizes in a cubic symmetry (Pm-3m space group) same as that in the ReO3-type structures.... Show more