Ferroelasticity and glass-like behavior in alkali halide-alkali cyanide mixed crystals

Single clear neutron diffraction studies in (KBr)1-x(KCN)x are summarized. Mixed crystals with CN- concentrations x > 0.6 display ferroelastic appearance transitions from a high-temperature artificial appearance into a low-temperature elastically ordered appearance in which the CN- orientations appearance continued ambit orientational adjustment and the centermost of accumulation filigree exhibits microburst distortions. For concentrations x ≤ 0.6 orientational ataxia is frozen-in and transitions into an orientational bottle accompaniment occur. Abutting to the analytical absorption xc ∼ 0.6 the diffraction profiles at the alteration temperatures are bedeviled by diffuse-scattering contributions. These after-effects are compared to archetypal calculations from Mayer and Cowley admiration a two-dimensional melting alteration in a clear with a collapsed instability. In the spirit of this archetypal we advance that the bottle accompaniment abutting to xc can be declared as a frozen-in two dimensional liquid. A schematic appearance diagram is complete which bears similarities with a appearance diagram as proposed by Galam aural the framework of a compressible glasses frame model.

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