The structure of the mixed crystal [K(NH)]H(SO) as obtained from single-crystal neutron diffraction is compared with the previously reported room-temperature neutron structure of crystalline KH(SO). The two structures are very similar, as indicated by the high value of their isostructurality index (94.8%). It was found that the replacement of even a small amount (3%) of K with NH has a significant influence on the short strong hydrogen bond connecting the two SO ions. Earlier optical measurements had revealed that the kinetics of the superionic transition in the solid solution [K(NH)]H(SO) are much faster than in KH(SO); this reported difference in the kinetics of the superionic phase transition in this class of crystal is explained on the basis of the difference in strength of the hydrogen-bond interactions in the two structures.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1107/S2052520617008642 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Crystal growth, structural phase transitions and optical gap evolution of FAPb(BrCl) hybrid perovskites (FA: formamidinium ion, CH(NH)).
Discov Nano
January 2025
Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049, Madrid, Spain.
Chemically tuned organic-inorganic hybrid halide perovskites based on bromide and chloride anions CH(NH)Pb(BrCl) (CH(NH): formamidinium ion, FA) have been crystallized and investigated by neutron powder diffraction (NPD), single crystal X-ray diffraction (SCXRD), scanning electron microscopy (SEM) and UV-vis spectroscopy. FAPbBr and FAPbCl experience successive phase transitions upon cooling, lowering the symmetry from cubic to orthorhombic phases; however, these transitions are not observed for the mixed halide phases, probably due to compositional disorder. The band-gap engineering brought about by the chemical doping of FAPb (BrCl) perovskites (x = 0.
View Article and Find Full Text PDFUltra-fast single-crystal CVD diamonds in the particle time-of-flight (PTOF) detector for low yield burn-history measurements on the NIF (invited).
Rev Sci Instrum
January 2025
Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
The Particle Time of Flight (PTOF) diagnostic is a chemical vapor deposition diamond-based detector and is the only diagnostic for measuring nuclear bang times of low yield (<1013) shots on the National Ignition Facility. Recently, a comprehensive study of detector impulse responses revealed certain detectors with very fast and consistent impulse responses with a rise time of <50 ps, enabling low yield burn history measurements. At the current standoff of 50 cm, this measurement is possible with fast 14 MeV neutrons from deuterium-tritium (DT) fusion plasmas.
View Article and Find Full Text PDFAdvancing dynamic quantum crystallography: enhanced models for accurate structures and thermodynamic properties.
IUCrJ
January 2025
Faculty of Chemistry, University of Warsaw, Pasteura 1, Warsaw, 02-093, Poland.
X-ray diffraction (XRD) has evolved significantly since its inception, becoming a crucial tool for material structure characterization. Advancements in theory, experimental techniques, diffractometers and detection technology have led to the acquisition of highly accurate diffraction patterns, surpassing previous expectations. Extracting comprehensive information from these patterns necessitates different models due to the influence of both electron density and thermal motion on diffracted beam intensity.
View Article and Find Full Text PDFFerrotoroidicity in CsFeCl·DO.
Sci Rep
December 2024
Institut Laue-Langevin, 71, av des Martyrs CS 20156, Grenoble, 38042, France.
The promise of antiferromagnetic spintronics largely relies on the possibilities of electrical manipulation of antiferromagnetic states, which requires the exploration of innovative material platforms to meet the challenge. Erythrosiderite-type compounds constitute a class of non-oxide materials presenting magneto-electric couplings ranging from multiferroicity to linear magneto-electric behaviour. In this communication, we demonstrate that Cs[FeCl(DO)] shows evidence of another ferroic order, ferrotoroidicity, providing an alternative way of manipulating the magnetic states.
View Article and Find Full Text PDFEfficient soft-chemical synthesis of large van-der-Waals crystals of the room-temperature ferromagnet 1T-CrTe.
J Mater Chem A Mater
December 2024
Department of Quantum Matter Physics, University of Geneva 24 Quai Ernest-Ansermet CH-1211 Geneva Switzerland
We herein report on a fast and convenient soft-chemical synthesis approach towards large 1T-CrTe van-der-Waals crystals. This compound is formed X-ray diffraction pure, with a complete conversion within just over 2 h from flux-grown LiCrTe crystals using diluted acids. Due to the availability of high-quality single crystals, we have confirmed the crystal structure for the first time by single-crystal X-ray diffraction experiments.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!