Lattice dynamics of calcium oxide

The effect of the electronic extension on the electrostatic potential was first taken into account functionally by Birman. We have applied his model to the lattice dynamics of CaO, where the degree of the electronic extension w was defined and determined with the use of the electronic charge density distribution obtained from analysis of X-ray data. Our treatment shown here not only gives a physically meaningful model including the feature of the electronic extension, but also involves essentially the same very simple process as the conventional point-charge model but with fewer adjustable parameters. Good reproduction of calculated phonon dispersion curves was obtained by taking into account the electronic extension, although the degree of the electronic extension, w, used to fit the curve was a little larger than that derived from the observed data owing to the first rough approximation for the potential energy arising from the electronic extension.     

From discrete rotational bands to damped rotational motion

We present shell model calculations for warm rotating nuclei, combining the cranked Nilsson mean field and a residual surface-delta two-body interaction. The model is used to describe the transition from the region of well-defined rotational bands into the region dominated by rotational damping, and the results are in overall agreement with the experimental findings.     

Electronic structure of the organic conductors based on BMDT-TTF (BIS(methylenedithio)tetrathiafulvalene)

In the crystals of the cation radical salts based on the organic donor BMDT-TTF, the charge separation is observed. This comes from (1) nonequivalency of the site potential and (2) the long range electron-electron interaction, which are related to the two-dimensional nature of the molecular arrangement. The effects of the charge separation on the elctronic structure are discussed.     

Fluorescence reaction between o-hydroxyhydroquinonephthalein and vanadium in micellar media, and its application

Summary The formation of complexes amongst vanadium, o-hydroxyhydroquinonephthalein (Qnph), or/and chlorpromazine hydrochloride (CP · HCl), as a phenothiazine drug, in non-ionic surfactant micellar media was fluorometrically investigated in weakly acidic media. Fluorometric methods for the determination of vanadium and CP · HCl were respectively established by measuring the difference of relative fluorescence intensities (F) between Qnph and Qnph-vanadium solutions, andF between Qnph-vanadyl and Qnph-vanadyl-CP · HCl solutions at an emission wavelength of 540 nm with excitation at 400 nm in the presence of polyvinyl alcohol (PVA) micelles. The calibration graphs were linear in the ranges of 0–0.5 vanadium and 0–220 g CP · HCl per 10 ml of aqueous solution. The relative standard deviations (5 replicates) were 2.5% for 0.2 g vanadium and 1.3% for 100 g CP · HCl per 10 ml of aqueous solution, respectively. The applications to assays of vanadium in water and CP · HCl preparations were investigated, and the results were relatively good.

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Fluorescenzreaktion von o-Hydroxyhydrochinonphthalein und Vanadium in micellaren Medien und deren Anwendung

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Application of xanthene derivatives in analytical chemistry. Part LXXIII. Part LXXII see ref. [1]     

Heat capacities of copper(II) formate tetrahydrate and tetradeuterate: A comparative study of phase transitions in layer hydrate crystals

The heat capacities of copper(II) formate tetrahydrate and tetradeuterate have been measured from 12 to 300 K with an adiabatic calorimeter. They have sigmoidal temperature dependence except near the antiferroelectric-paraelectric transition temperatures, 235.78 ± 0.05 K and 245.64 ± 0.05 K, respectively. The corresponding enthalpy changes are 836.0 ± 1.0 J mol^?1 and 936.9 ± 0.5 J mor^?1. The entropy changes are 3.546 ± 0.005 JK^?1mol^?1 and 3.814 ± 0.002 JK^?1 mol^?1. The heat capacities are larger in the high temperature phase than in the low temperature phase, the difference amounting to 5.74 JK^?1 mol^?1 and 7.15 JK^?1 mol^?1 for the hydrate and the deuterate, respectively. The heat capacity anomaly is compared with those in tin(II) chloride dihydrate and potassium hexacyanoferrate trihydrate and discussed in relation to the structure of the hydrogen bond networks in these substances. The discussion is extended to include possible properties of the hydrogen bond frameworks in ices I_h and II.