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In this article, the authors demonstrate the experimental findings of the effect of dynamic shock waves on the crystallographic structural stability and the optical properties of l-tartaric acid (LTA) single crystal such that it has been characterized by single-crystal X-ray diffraction and UV–Visible spectroscopic techniques. To start with, seven identical title crystals have been examined against different number of shock pulses such as 3, 6, 9, 12, 15, 18, and 21, respectively, and the optical transmittance spectra of the pristine and shock-wave-exposed crystal samples have been recorded. The pristine, 12th and 21st shocked samples have been subjected to the single-crystal diffraction study so as to confirm the crystallographic structural stability at shocked conditions. According to the outcome of the optical results, there is no change in the absorption edge positions whereas considerable changes are observed in optical transmittance due to the surface morphological changes. Single crystal XRD data show that the test crystal could retain its original P21 space group even at the 21st shock pulse-loaded condition, and hence, it is suggested that LTA crystal could be a good fit for the applications of micro-electronic device fabrications. [ABSTRACT FROM AUTHOR]

In recent years, the investigation of the effect of shock waves on crystalline materials has emerged as a prolific research area in materials science branch. The impact of shock waves on K 2 SO 4 was investigated such that the molecular and structural stabilities under pre and post-shock wave loaded conditions at Mach number 2.2 with 50 and 100 shocks were established. Molecular stability of the test samples has been identified making use of FTIR spectrometer and the structural stability of the samples has been investigated by a Powder X-ray diffractometer (PXRD) which reveals that shock waves induce lattice orientational changes and micro distortions but, the original crystal system is not affected. The above-mentioned crystallographic studies show the impressive physical properties of K 2 SO 4 which also has a stable crystal structure under shock wave loaded conditions. A comparison of single and poly-crystalline structural responses has been made with respect to the number of shock pulses. The fascinating findings of the shock wave impacts on K 2 SO 4 samples are clearly discussed in this article. • Crystallographic phase stability of the poly-crystalline and single crystalline K 2 SO 4 at shocked conditions is reported. • FT-IR and XRD results show the stable crystal structure of poly-crystalline samples at shocked conditions. • Poly-crystalline K 2 SO 4 sample has relatively high structural stability and shock resistance compared to the single crystal. [ABSTRACT FROM AUTHOR]

As per the literature reports available so far, there are numerous experiments that have been conducted and demonstrated on the crystallographic phase stability of a variety of materials such as metals, inorganic and organic materials by the impact of the shock waves. In the present course of work, we have selected one of the simple metal complex hydrate materials of copper sulfate pentahydrate (CuSO 4 ·5H 2 O) for shock wave recovery experiment so as to examine the phase stability and shock wave induced dehydration process since it has a high possibility of undergoing phase transition with the sequence of 5H 2 O/3H 2 O/H 2 O. The molecular and crystallographic phase details have been examined by Raman spectroscopy and powder X-ray diffractometry (PXRD). Surprisingly, as per the observed spectroscopic and diffraction studies, the title material has not undergone any phase transition. [Display omitted] • Crystallographic phase stability of the poly-crystalline CuSO 4 ·5H 2 O at shocked conditions is reported. • Raman and XRD results show the stable crystal structure of poly-crystalline samples at shocked conditions. • Poly-crystalline CuSO 4 ·5H 2 O sample has high structural stability and shock resistance. [ABSTRACT FROM AUTHOR]

This article carries the findings of the effect of shock waves on glycine phosphite (GPI) powder samples which have been investigated under pre and post shock loaded conditions with the shock pulses of 50 and 100 at the Mach number of 2.2. Molecular structural stability and crystal structural stabilities have been established by Fourier transform infrared spectroscopy (FTIR) and powder X-ray diffractometry (XRD). From XRD studies, it has been observed that there is change in crystalline peak intensity, peak distortion and formation of new peaks in shock wave loaded samples whereas no alteration in the original crystal system. There is no change observed in FTIR profiles at shock loaded conditions. The obtained crystallographic studies prove with substantial evidence that the crystal has molecular stability and stable crystallographic structure against the impact of applied shock waves. On the other hand, many of the crystalline planes have disappeared and re-appeared with respect to number of shock waves but maintaining the same crystallographic phase. From the shock wave impact study; the authors suggest that GPI crystal, particularly (21-1) orientation, is suitable for devices used in harsh environment and high power laser application due to the relative stability of the crystalline properties. Image 1 • Molecular and crystallographic phase stabilities on GPI powder samples at shocked conditions are reported. • FTIR results reveal that, GPI sample has spectacular molecular stability at shocked conditions. • XRD results show that stable crystal structure stability at shocked conditions. • Particularly (21-1) orientation is highly suitable for device applications due to high shock resistance. [ABSTRACT FROM AUTHOR]

[Display omitted] • Crystallographic phase stability of the poly and single crystalline lead nitrate at shocked conditions is reported. • XRD and Raman results show the stable crystal structure of poly-crystalline samples at shocked conditions. • Poly-crystalline lead nitrate sample has relatively high structural stability and shock resistance compared to the single crystal. In the present work, we report the crystallographic structural stability of the poly-crystalline lead nitrate samples at shocked conditions with which a systematic comparison is made for the previously reported single-crystalline lead nitrate crystal at shocked conditions. X-ray diffractometry (XRD) and Raman spectroscopic measurements have been performed to assess the crystallographic structural stability of poly-crystalline Pb(NO 3) 2 samples at shocked conditions and the observed XRD and Raman results disclose that the title poly-crystalline samples retain the original crystallographic structure even at 100 shocked conditions interacting with the shock waves of 2.2 Mach number. But the single crystals of Pb(NO 3) 2 undergo crystalline to amorphous phase transition at shocked conditions. Based on the observed results, poly-crystalline samples have higher-structural stability than that of single crystals. The outcome of this work provides glimpses of possible further contributions to crystal engineering for the design of new materials with specific physical and chemical properties. [ABSTRACT FROM AUTHOR]