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Interest in the deformation behavior and phase transformations of rare earth orthophosphates (REPO4s) spans several fields of science—from geological impact analysis to ceramic matrix composite engineering. In this study, the phase behavior of polycrystalline, xenotime DyPO4 is studied up to 21.5(16) GPa at ambient temperature using in situ diamond anvil cell synchrotron X-ray diffraction. This experiment reveals a large xenotime–monazite phase coexistence pressure range of 7.6(15) GPa and evidence for the onset of a post-monazite transformation at 13.9(10) GPa to scheelite. The identification of scheelite as the post-monazite phase of DyPO4, though not definitive, is consistent with REPO4 phase transformation pathways reported in both the experimental and the computational literature.

X-ray diffraction (XRD) analysis has been carried out on Se19Te81-xZnx (x = 0, 3, 6, 9) samples and their diffractograms are analyzed to obtain information about various crystallographic aspects. XRD traces of all samples are taken at room temperature which shows almost similar trends. These traces confirm the formation of alloys of Se19Te81-xZnx. The presence of sharp structural peaks in these XRD patterns confirmed the polycrystalline nature of the material. In all the samples the average particle size of the alloy is found to be 4.4778 μm and mean density is found to be 120.73 g/cc. [ABSTRACT FROM AUTHOR]

Copper and cobalt complexes derived from 3-(N-phenyl)-thiourea-pentanone-2 were characterized by elemental, XRD, FTIR, UV-Vis, SEM and 1H NMR spectroanalytical studies. The X-ray diffraction studies indicate that 3-(N-phenyl)-thiourea-pentanone-2 and complexes with copper and cobalt are crystalline in nature with simple cubic lattice structure. IR spectroscopic data were used to assign characteristic vibrational frequencies of groups present in these compounds. Scanning electron micrograms were used to assign morphology and particle size. [ABSTRACT FROM AUTHOR]