A Mössbauer powder diffractometer was used to measure diffraction patterns from polycrystalline foils of Fe3Al. The intensities of Bragg diffractions were measured as a function of the energy of the incident photon. The bcc fundamental diffractions showed large changes in intensity as the incident energy was tuned through the nuclear resonances. These variations of diffraction intensity with in...

The power of the state-of-the-art neutron powder diffractometer suite at the Institut Laue–Langevin for investigating the structure of nondeuterated materials is presented using gypsum, CaSO4 2H2O, as a reference material. It is shown that flexible modern neutron powder diffraction instruments at reactorbased sources can yield data with sufficient counting statistics above the incoherent scatte...

One of the smallest molecular cocrystals consisting of acetylene and ammonia is grown in situ on the X-ray diffractometer. The resulting 1:1 molecular cocrystal is composed of antiparallel layers of zigzag chains. Subunits of the crystal structure are already stable as small molecular aggregates as shown by ab initio calculations. These aggregates may be considered as infant stages of cocrystal...