High Pressure Phases of Terbium: Possibility of a THCP (Triple Hexogonal Closed Packed) Phase

摘要

High pressure phases of trivalent Tb studied by energy dispersive x-ray diffraction with synchrotron radiation exhibits the closed packed sequence (hcp -> Sm -> dhcp -> fcc) typical of the trivalent rare earth metals. Furthermore, a phase consistent with a triple hexogonal closed packed (thcp) structure was observed in a narrow pressure range around 30 GPa.