No changes in the lattice constant or standard parameters due to statistical displacements of atoms from their ideal positions at room temperature were revealed during a study of the atomic structure of GaAs crystals gettered by Y. Nevertheless, the effect observed for conventional non-gettered crystals, and associated with the influence of point defects on the phonon spectrum, disappeared.

Effect of Gettering on the Atomic Structure of Gallium Arsenide. A.A.Vapolin, A.T.Gorelenok, V.N.Mdivani, É.A.Ilichev: Physics of the Solid State, 2007, 49[2], 220-2