Hydrothermal investigations in the high silica region of the Na20-Y 203-Si60 15 system, carried out in a search for novel fast-ion conductors (FIC's), yielded the new compound trisodium yttrium hexasilicate, Na3 YSi60 15 • Single-crystal X-ray methods revealed that Na3 YSi60 15 crystallizes in space group Ibmm, has lattice constants a = 10.468 (2), b = 15.2467 (13) and c = 8.3855 (6) A, Z = 4, ...

Theory of the off-centre instability is developed for the impurity ions (Li', CuC, and Ag') in alkali halides on the basis of the charge transfer excitation model which is different in the involved electronic processes from the earlier theory based on the polarizable-point charge ion model. The lowest potential minima for the impurity ion along < 11 1 ), ( 110 ), and < 100 ) crystal axes are ca...

Alkali metal ion batteries, and in particular Li-ion have become a key technology for current future energy storage. The inherent complexity of batteries their components make computational approaches on different length time scales indispensable gaining atomistic insights as well predicting new materials with improved properties. In this comprehensive review, the theoretical concepts that unde...

Layered alkali-containing 3d transition-metal oxides are of the utmost importance in use electrode materials for advanced energy storage applications such as Li-, Na-, or K-ion batteries. A significant challenge field chemistry is understanding dynamics chemical reactions between alkali-free precursors and alkali species during synthesis these compounds. In this study, situ high-resolution sync...

A novel concept for ion blocking in gas-avalanche detectors was developed, comprising cascaded micro-hole electron multipliers with patterned electrodes for ion defocusing. This leads to ion blocking at the 10 level, in DC mode, in operation conditions adequate for TPCs and for gaseous photomultipliers. The concept was validated in a cascaded visible-sensitive gas avalanche photomultiplier oper...

Layered ƒÁ-titanium phosphate (ƒÁ-TiP), Ti(HP04)2.2H20, is well known as the host material of intercalation compounds and the inorganic ion-exchanger of H+/metal ion system. It was found to have high ion-exchange selectivity for Rb+ and Cs+ among alkali metal ions. The ionexchange reactions for these ions progressed in two steps according to pH. Part of water molecules in the mterlayer of ƒÁ-Ti...

The Watson-Crick structure of DNA is among the most well-known molecular structures of our time. However, alternative base-pairing motifs are also known to occur, often depending on base sequence, pH, or the presence of cations. Pairing of cytosine (C) bases induced by the sharing of a single proton (C-H(+)-C) may give rise to the so-called i-motif, which occurs primarily in expanded trinucleot...

With the exception of Milroy’sl work, no systematic attempt has been made, as far as the writer has been able to ascertain, to follow chemically the changes in alkaline reserve during the period immediately following hemorrhage. Since the Van. Slyke2 method has been devised, such a study has been greatly facilitated. Not only can more extensive data be obtained by the use of this method, due to...