Root-Mean-Square Displacements of Atoms in the B2-Phase of Titanium Nickelide

Abstract

Using of MoK_α radiation, on a single crystal of a titanium nickelide intensities of 15 structural and 11 superstructural reflections of the B2-phase are measured. Structural factors of scattering for these reflections are calculated, and root-mean-square displacements of atoms of nickel and atoms of titanium from positions of equilibrium are determined. The mean square of displacements of atoms of nickel is equal ⟨u²⟩_Ni=(8.7±0.6)×10⁻⁴ nm², atoms of titanium −⟨u²⟩_Ti=(3.9±0.3)×10⁻⁴ nm².