Alkali Halides
A study of ytterbium and europium in the alkali halides
... There are numerous intrinsic point defect centres occuring in the alkali halides based upon the anion and cation vacancies. The most important of these consists of an electron trapped in the potential field ...
357
A Semi-Empirical Approach for the Cohesive Energy of the Alkali Halides
... Many formulae are available for the cohesive energy of the alkali halides. These have many terms and the predictions of most of these are not very accurate. We give a semi-empirical formula for the cohesive ...
6
Effect of Many Body Interactions on the Isothermal Bulk Modulus of Alkali Halides
... of alkali halides better, we have employed a model which includes van der Waals interactions and three body interactions and short- range repulsion effective up to the second neighbors in the frame work of ...
6
Optical spectra and energy levels of divalent ytterbium and samarium ions in some alkali halides
... in alkali halides which lead to the strong suggestions that the formation of divalent ion-cation vacancy is the major charge compensating mechanism [135-137,309-312], it appears reasonable to assume that ...
265
Cold ablation driven by localized forces in alkali halides
... In summary, we found evidence for a cold laser ablation process that takes place in alkali halides upon UV light photoexcitation of an extremely small fraction of halide centres. The observed dynamics ...
32
THERMOELASTIC INSTABILITY OF ALKALI HALIDES AT HIGH TEMPERATURE
... In present paper, I calculated the values of melting temperature(T m ) for Alkali halides, Isothermal bulk modulus. (K T ) using the Anderson formula[r] ...
11
THE LATTICE-RELAXATION ENERGY ASSOCIATED WITH SELF-TRAPPING OF A POSITIVE HOLE AND AN EXCITON IN ALKALI-HALIDES
... We have evaluated the upper and lower bounds to the lattice relaxation energy gained on the self-trapping of excitons, using experimental values of transition energies for free a[r] ...
8
Ion association and solvent interaction-conductance of alkali halides in chitosan solutions at four different temperatures
... the halides in chitosan ...of halides of potassium, sodium and ammonium has been measured in the concentration range of 4 x 10 -4 to 8 x 10 -2 mol dm -3 in ...
8
Ion association and solvent interaction-conductance of alkali halides in chitosan solutions at four different temperatures
... Chitosan is derived from chitin a polysaccharide, which is also cellulose like polymer consisting mainly an unbranched chains of N-acetyl-D-glucosamine. Since chitosan finds wide applications in agriculture, ...
10
INITIAL PRODUCTION OF DEFECTS IN ALKALI-HALIDES - F AND H CENTER PRODUCTION BY NON-RADIATIVE DECAY OF SELF-TRAPPED EXCITON
... The barrier to further separation of the F-H pair just mentioned can be overcome if the H centre is formed in an excited state (Itoh and Saidoh 1973). This F-H state may still have a [r] ...
13
A theoretical study of desorption induced by electronic transitions in alkali halides
... There are several terms which are identifiable (altered Madelung energies, surface dipoles arising from.. rumpling, image potential terms, etc.) though the broad pic[r] ...
17
Thermomodulation Study of Plasmons and Longitudinal Excitons in Alkali Halides
... Analysis of the differential dielectric and electron-energy-loss functions shows that the energy-loss peak generally attributed to the valence plasmon actually arises from the plasmon an[r] ...
6
A study of coloration and bleaching phenomena in alkali halides and sodalite
... Abstract Experiments are described in this thesis on the optical bleaching at room temperature of F centres in freshly cleaved single crystal KEr, coloured by tast electron ~50.. KV irra[r] ...
257
Microwave Assisted Ecofriendly Halogenation of Organic Compounds by Hypervalent Cr (VI) Reagents with Alkali Metal Halides in Acid Free Media
... and alkali metal halides in acid free media is been described in the present ...of alkali halides? and smooth high yield halogenations ...
9
tosi festschrift
... Here we are concerned with the surface of alkali halides, crystals well known for their unusually stable neutral (100) faces. Addressing a long time ago the NaCl (100) surface, bubble experiments by ...
9
Variation in susceptibility to microbial lignin oxidation in a set of wheat straw cultivars : influence of genetic, seasonal and environmental factors
... prepared alkali lignin samples from a set of 18 wheat cultivars, and examined the rates of microbial lignin oxidation using a UV-visible continuous ...The alkali lignins were characterized by FT-IR ...
16
A study of some organoarsenic and organoantimony halides
... The only known bismuth compounds o f type R^EX are the tetraphenyl compounds... They are obtained by..[r] ...
247
Understanding of alkaline pretreatment parameters for corn stover enzymatic saccharification
... Although alkaline pretreatment and chemical pulping share many similarities in reaction chemistry and substrate physicochemical changes, the desired outcomes from pretreatment and pulping are very different. The purpose ...
10
Laminaria digitata and palmaria palmata seaweeds as natural source of catalysts for the cycloaddition of CO2 to Epoxides
... This paper details an investigation of the use of two different seaweeds as one-component, natural catalysts for the formation of cyclic carbonates due to the high quantities of metal halides found in the plant ...
15
PERFORMANCE OF ALKALI ACTIVATED SLAG WITH VARIOUS ALKALI ACTIVATORS
... Copyright to IJIRSET www.ijirset.com 379 activated by OH - ions supplied in other ways such as addition of sodium hydroxide or silicate. Alkali activated slag is not a widely known and used construction material. ...
9