Crystal structures of the alkali aluminoboracites BAlOCl ( = Li, Na).

Acta Crystallogr E Crystallogr Commun

Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachoji, Tokyo 192-0397, Japan.

Published: February 2024

Single crystals of alkali aluminoboracites, BAlOCl ( = Li, Na), were grown using the self-flux method, and their isotypic cubic crystal structures were determined by single-crystal X-ray diffraction. NaBAlOCl is the first reported sodium boracite, and its lattice parameter [13.5904 (1) Å] is the largest among the boracites consisting of a cation-oxygen framework reported so far. For both crystals, structure models refined in the cubic space group 3, which assume that all cubic octant subcells in the unit cell are equivalent, converged with 1 factors of ∼0.03. However, the presence of weak reflections with odd and values indicates that refinements in the space group 23, which presume a checkerboard-like ordering of two types of subcells with slightly different atomic positions, are more appropriate.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10848984PMC
http://dx.doi.org/10.1107/S2056989024000501DOI Listing

Publication Analysis

Top Keywords

crystal structures
8
alkali aluminoboracites
8
aluminoboracites balocl
8
space group
8
structures alkali
4
balocl single
4
single crystals
4
crystals alkali
4
balocl grown
4
grown self-flux
4

Similar Publications

Phase diagrams and crystallography are standard tools for studying structural phase transitions, whereas acquiring kinetic information at the atomistic level has been considered essential but challenging. The η-to-θ phase transition of alumina is unidirectional in bulk and retains the crystal lattice orientation. We report a rare example of a statistical kinetics study showing that for nanoparticles on a bulk Al(OH) surface, this phase transition occurs nondeterministically through an ergodic equilibrium through the molten state, and the memory of the lattice orientation is lost in this process.

View Article and Find Full Text PDF

Planar 1D photonic crystals (1DPhCs), owing to their photonic bandgaps (PBGs) formed by unique structural interference, are widely utilized in light protection applications. Multifunctional coatings that integrate various light management functions are highly desired. In this study, we present the fabrication of dual-PBG 1DPhCs with high reflectance in both the blue and near-infrared (NIR) regions.

View Article and Find Full Text PDF

Enhanced high-energy proton radiation hardness of ZnO thin-film transistors with a passivation layer.

Nano Converg

January 2025

Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 29 Geumgu-gil, Jeongeup-si, Jeolabuk-do, 56212, Republic of Korea.

Metal-oxide thin-film semiconductors have been highlighted as next-generation space semiconductors owing to their excellent radiation hardness based on their dimensional advantages of very low thickness and insensitivity to crystal structure. However, thin-film transistors (TFTs) do not exhibit intrinsic radiation hardness owing to the chemical reactions at the interface exposed to ambient air. In this study, significantly enhanced radiation hardness of AlO-passivated ZnO TFTs against high-energy protons with energies of up to 100 MeV is obtained owing to the passivation layer blocking interactions with external reactants, thereby maintaining the chemical stability of the thin-film semiconductor.

View Article and Find Full Text PDF

ISB 1442 is a bispecific biparatopic antibody in clinical development to treat hematological malignancies. It consists of two adjacent anti-CD38 arms targeting non-overlapping epitopes that preferentially drive binding to tumor cells and a low-affinity anti-CD47 arm to enable avidity-induced blocking of proximal CD47 receptors. We previously reported the pharmacology of ISB 1442, designed to reestablish synthetic immunity in CD38+ hematological malignancies.

View Article and Find Full Text PDF

SARS-CoV-2 variant recurrence has emphasized the imperative prerequisite for effective antivirals. The main protease (Mpro) of SARS-CoV-2 is crucial for viral replication, making it one of the prime and promising antiviral targets. Mpro features several druggable sites, including active sites and allosteric sites near the dimerization interface, that regulate its catalytic activity.

View Article and Find Full Text PDF

Want 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!