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Even slight changes occurring in the lattice positions of solid materials enforced by the external forces may give rise to remarkable results in the crystallographic nature. The materials which undergo phase‐change without modifying their overall chemistry are the prominent candidates to be the driving forces for the applications involving phase transitions. In the present context, the authors present and demonstrate the switchable phase transition occurring between crystalline and amorphous nature of cadmium sulfate octahydrate single crystals (3CdSO4·8H2O) impacted by shock waves with which the transition is authenticated via diffraction, vibrational and optical spectroscopic techniques such as powder X‐ray diffractometry, Raman and UV‐Vis spectral analyses. Based on the results attained from diffraction and spectroscopic analyses, it is observed that the switchable phase transition sequence is crystalline–crystalline–amorphous–crystalline–crystalline with respect to the control, one, two, three, and four shock‐wave‐loaded conditions, respectively. Due to the outstanding switching behavior, the title material is strongly suggested for the applications of molecular switching and optical data storage systems. [ABSTRACT FROM AUTHOR]

[Display omitted] • Shock wave induced disorder into order graphite structure is reported. • The control and 750 shocked I D /I G ratio values are 0.709 and 0.251. • The correlation of the magnetic properties and degree of crystalline nature is discussed. • The proposed technique is highly suitable for the synthesis of large-scale crystalline graphite. The existence of the long-range order under extreme conditions is a highly unusual structural concept that remains one of the top-class fundamental questions for every high-pressure researcher to resolve. In the present study, it is probably the first time that we report the acoustical shock wave-induced conversion from disordered graphite (I D /I G - 0.709) to highly-ordered graphite (I D /I G - 0.251) at the 750-shocked condition and the obtained long-range ordering is comprehensively examined by a few representative microscopic observations which include the Raman spectroscopy, photoelectric X-ray spectrometry and transmission electronic microscopy. Furthermore, the shock wave-induced hot-spot nucleation mechanism for the graphitization is put forward in combination with the outcome of the obtained magnetic, electrical and thermal experimental data. All of these acquired results clearly demonstrate that by using the acoustical shock waves, it is possible to provide one distinctive insight into deeply disclosing the large-scale synthesis of crystalline graphite, which has the potential to be utilized extensively in future commercial applications. [ABSTRACT FROM AUTHOR]

Herein, the crystallographic phase stability of the polycrystalline sample of sodium sulfate (Na2SO4) crystal at dynamic shocked conditions is reported and the phase stability profile of this sample with respect to the number of shock pulses is drawn from the outcomes of the X‐ray diffraction and Raman spectroscopic results. Interestingly, the polycrystalline sample does not undergo any high‐temperature polymorphic phases even at 100 shocked conditions. Note that the single‐crystalline Na2SO4 sample does undergo the crystallographic phase transition at dynamic shocked conditions. Based on the overall observed data, the polycrystalline sample has high shock resistance compared to that of the single‐crystalline sample and the obtained results are discussed elaborately. In addition to that, the present work can provide a shadow of light on the flow stress occurring on materials due to the influence of shock waves with respect to their existing state. [ABSTRACT FROM AUTHOR]