The highest-quality X-ray optics can be made of single-crystal materials such as silicon, germanium, or, even better, diamond. Unfortunately, have one drawback: diffraction losses or the “glitch effect”. This effect manifests itself follows: at some energies X-rays, intensity transmitted beam drops due to fact that crystalline planes satisfied condition. Diffraction are usually observed in spec...

Recrystallisation of paracetamol from a solution in methanol at a pressure of 0.62 GPa gives a new 1:1 solvate that has been characterised by single crystal X-ray diffraction.

A novel sol–gel process suitable for depositing thin-film lead barium titanate has been developed. X-ray diffraction analysis showed perovskite phase crystallization to occur at a temperature as low as 400°C with single-phase Pb0.5Ba0.5TiO3 (PBT) resulting at a temperature as low as 500°C. Small concentrations of barium carbonate were evident by X-ray diffraction at 400°C, and indications of mi...

X-ray diffraction and Raman spectroscopy were employed to study the phase diagram of SF6 at pressures up to 32GPa. The known phase transformation of SF6 phase I to phase II at around 2GPa was confirmed. Discontinuities in the pressure dependence of the Raman frequencies and positions of X-ray reflections indicate further phase transitions at 10(1) and 19(1)GPa. The crystal structures of phases ...

The crystal structure solution of modulated compounds is often very challenging, even using the well established methodology of single-crystal X-ray crystallography. This task becomes even more difficult for materials that cannot be prepared in a single-crystal form, so that only polycrystalline powders are available. This paper illustrates that the combined application of transmission electron...

X-ray Bragg diffraction in sagittal geometry on a Y-cut langasite crystal (La3Ga5SiO14) modulated by Λ = 3 µm Rayleigh surface acoustic waves was studied at the BESSY II synchrotron radiation facility. Owing to the crystal lattice modulation by the surface acoustic wave diffraction, satellites appear. Their intensity and angular separation depend on the amplitude and wavelength of the ultrasoni...