Norihiko L. Okamoto, Takuya Hatakeyama, Hongyi Li and Tetsu Ichitsubo
Discovery of thermal storage materials that can utilize low-temperature waste heat
We have discovered that layered manganese dioxide (birnessite, δ-MnO₂) can store/release heat through an intercalation mechanism in which water molecules in a moist atmosphere are deintercalated/intercalated between the layers. The material has been found to have an excellent balance...
3D ED/microED has been attracting much attention because it enables structure analysis of crystals smaller than 1 μm. In this article, examples of crystal structure analysis and some applications of MicroED/3D ED will be presented.
Despite increasing demand for 3D ED/MicroED, measurement and analysis with this analytical technique has not been...
Takashi Matsumoto, Akihito Yamano, and Takashi Sato
X-ray solution scattering experiments have been utilized to analyze structures and conformational changes of biological macromolecules. Those experiments employ X-ray scattering data in a small-angle region, a technique called Small Angle X-ray Scattering (SAXS). SAXS experiments often focus on the macroscopic shapes and sizes of molecules. However, in principle, the...
In the past, total scattering data was used to obtain the pair distribution function (PDF) G(r). However, it has become clear that it is also possible to calculate characteristic values related to the physical properties of materials from the total scattering data. In this paper, we introduce two applications using...
Helium gas is becoming more difficult to obtain these days due to decreased supply and increased demand. In X-ray fluorescence analysis, helium gas is often used in the analysis of liquid samples, while processing samples as solids is possible under a vacuum. In this article we introduce two liquid sample...
This article describes the principles and applications of iterative reconstruction in X-ray computed tomography. We use several real examples to show how iterative reconstruction can produce higher-quality reconstructed images than the conventional reconstruction method.
This article describes the principles and applications of iterative reconstruction (IR) methods. Section 2 describes the...
NEX CG II is a multi-element, multi-purpose energy dispersive X-ray fluorescence (EDXRF) spectrometer that performs rapid qualitative and quantitative trace elemental analyses and addresses needs across many industries. This next-generation, high-end spectrometer is ideal for trace heavy metal and halogen analysis, which is in increasing demand for several sectors. These...
Measurement and analysis software is the crucial interface between the user and an analyzer. Its ease of operation affects how efficiently users achieve their goals. In pursuit of better usability and improved functionality, Rigaku has developed a new measurement and analysis program called “Vullios.”
MILabs B.V. (Headquarters: The Netherlands, hereinafter MILabs), which joined the Rigaku Group in August 2021, is a leading global manufacturer of preclinical imaging systems. Preclinical research, as the name suggests, is a crucial step in the drug discovery process that usually uses mice and rats in advance of clinical trials...
Atsushi Ohbuchi, Takahiro Kuzumaki, Miki Kasari and Tetsuya Ozawa
X-ray diffractometry is widely used for quality control and process control in cement. This article presents an accurate and precise quantification method for free lime in a clinker material and an accurate quantification method of the admixtures in a blended cement. The partial accumulation measurement was used to make a...
Three-dimensional real-space modeling for hierarchical materials by matching experimental and simulated small-angle X-ray scattering patterns is proposed. The positional arrangements of small primary particles in the cell are estimated by the reverse Monte Carlo modeling and the simulated SAXS patterns are derived from these models. This modeling has been applied...
X-ray diffraction (XRD) has traditionally been utilized mainly in the R&D field. Recently, however, opportunities to use XRD in the QA/QC field are increasing since the XRD technique has become easier to use with the popularization of desktop X-ray diffractometers and high-speed 1D semiconductor strip detectors (1D SSD). Rigaku has...