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Abstract  

Mössbauer spectra of (Fe0.5Zn0.5)PS3, which is isomorphous with FePS3, were measured at 300 and 80 K, and were compared with those of FePS3. We succeeded in preparing (Fe0.5Zn0.5)PS3 intercalated with pyridine. In the XRD pattern of the intercalate the diffraction peaks corresponding to (Fe0.5Zn0.5)PS3 were completely missing, suggesting that the intercalation was completely performed with pyridine. The Mössbauer spectra were changed significantly by the intercalation suggesting the charge transfer from guest molecules to the host matrix. The replacement of iron by zinc has no influence on the electronic state of the iron atom, except for the magnetic interaction.

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Abstract  

Fullerenes, C60 and C70, were irradiated by 8 and 10 MeV deuterons. The irradiated samples were dissolved in CS2 and filtered to remove insoluble by-products. Finally, radioactive fullerenes and products, such as fullerene dimers, trimers labeled with13N, were isolated and detected in the liquid phase by radiochromatography. This suggests that the energy rich13N atoms successfully incorporated into the fullerene cages and that the disrupted cages reacted with neighboring cages.

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Abstract  

The composition of superconducting oxide, BaPb1–xBixO3 (BPB), was analyzed in order to decide the accurate x value. Oxygen and barium were determined non-destructively by3He and neutron activation analysis. Lead and bismuth were determined by substoichiometric isotope dilution analysis. Precision was within 3%. The x value determined xd, was larger than the initial composition, x.

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Journal of Thermal Analysis and Calorimetry
Authors:
H. Shigematsu
,
Y. Akishige
,
T. Matsui
,
T. Tojo
,
H. Kawaji
, and
T. Atake

Summary The phase diagram of the mixed crystal (K1-xRbx)2SeO4 was determined by means of thermal analysis and neutron scattering experiments. The hexagonal to orthorhombic phase transition line exists for any x. The normal-incommensurate phase transition temperature decreases continuously with increasing Rb content. However, the incommensurate-commensurate phase transition was not observed except for K2SeO4. According to the clear softening of the Σ2- Σ 3 phonon branches and the finite frequency at 0 K for x>0.34, an existence of the hypothetical phase transition was confirmed.

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