Internal pressure in alkali halides.

by Maija Ahtee

Publisher: Suomalainen Tiedeakatemia in Helsinki

Written in English
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  • Alkali metal halide crystals.

Edition Notes

Bibliography: p. 7.

SeriesAnnales Academiae scientiarum Fennicae. Series A. VI: Physica, 302
LC ClassificationsQ60 .H529 no. 302
The Physical Object
Pagination7 p.
ID Numbers
Open LibraryOL4366510M
LC Control Number78458528

Since the high-pressure P6/mmm phase is novel for alkali metal azides, it is essential to investigate the properties of P6/mmm structure in detail. The ratios of a/a 0 and c/c 0 for the P6/mmm structure seen in Fig. 3a exhibit that the compression is anisotropic with the reduction of lattice parameter a by % over the pressure studied, while lattice parameter c decreases by %.   In Table , we compare physical properties of the chlorides of elements in Groups I and II to the chlorides of the elements of Groups IV, V, and VI, and we see enormous differences. All of the alkali halides and alkaline earth halides are solids at room temperature and have melting points in the hundreds of degrees centigrade. Providing in a single volume all essential information on the physical properties of alkali halides, this book will be a valuable reference for solid-state physicists and materials scientists. Rating: (not yet rated) 0 with reviews - Be the first. Subjects.   Alkali Halides: A Handbook of Physical Properties (Springer Series in Materials Science 49) - Kindle edition by Sirdeshmukh, D.B., Sirdeshmukh, L., Subhadra, K.G.. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Alkali Halides: A Handbook of Physical Properties (Springer Series in Materials Manufacturer: Springer.

Conductance of the alkali halides. XI. Cesium bromide and iodide in water at deg. Kai-Li Hsia; and ; Solvent effect on stability of crown ether complexes of alkali-metal cations. Analytical Chemistry , 62 (10), The Distribution of Internal Distances for Ionic . First members in alkyl halide series are in gaseous state due to less molecular weight, but alkyl halides with high molecular mass are in liquid state. Alcohols are prepared by the reaction of alkyl halides and aqueous alkali. The halogen group is substituted by hydroxyl ion. In this reaction hydroxyl group behaves as a nucleophile. Ethyl.   Measurements from three laboratories of the inelastic scattering of alkali halides by rare gases are consistent with the formation of a short‐lived complex. The results from transfer of large or small amounts of translational energy to or from the internal modes can be fitted by calculations based on a simple statistical model. Chemical shifts, line shapes, linewidths, and lin intensities were measured as a function of pressure and crystal structure from 1 to 10/sup 4/ kg/ cm/sup 2/ at room temperature for both metal and halide nuclei in alkali halide pressed powder pellets.

  The effect of pressure to kbar has been measured on the luminescent properties of a series of alkali halides doped with Pb ++ and Sn ++ in both the fcc and simple cubic (sc) phases. In a few cases absorption or excitation data are also presented. For selected cases the results are analyzed in terms of a single‐configuration coordinate diagram and the possibilities and limitations are. Upon applying pressure on alkali halide model-crystals of B1 structure, the oscillation of TA[] mode becomes unstable. Due to deformation of TA[] mode, the repulsive force between the nearest neighbor ions is weakened, energy is lowered, and the instability sets in. For the discussion of onset of instability, the internal energy and Gibbs free energy lead to the same conclusion. From this fact, Barlow suggested that the alkali halides adopted structures in which the two kinds of atoms were arranged either in the body-centered or simple cubic structures. In , the Braggs carried out the first structure determination by X-ray diffraction; the materials they chose to study - alkali halides - had exactly the structures. Get this from a library! Alkali Halides: a Handbook of Physical Properties. [D B Sirdeshmukh; L Sirdeshmukh; K G Subhadra] -- The alkali halide crystals have always been at the centre stage of solid-state physics. They have been "model crystals" for testing many solid-state theories. In recent decades, they have also proved.

Internal pressure in alkali halides. by Maija Ahtee Download PDF EPUB FB2

Milton Ohring, in Engineering Materials Science, Point Defects in Ionic Compounds. In alkali halides and metal oxides where positive and negative ions populate lattice sites, point defect structures are more complex.

Maintenance of charge neutrality is the reason. To visualize the issues involved let us consider Fig. B which depicts an electrically neutral lattice composed of.

PH VS I CAL REVIEW VOr. UME i 64, NUMBER 1 5 DECEMBER 1 9 6 "tp' Luminescence Internal pressure in alkali halides. book Il Centers in Alkali Halides under Hydrostatic Pressure* A.

BloTHERs wwo D. Lewd lnstitnte for Atomic Itesearch and Department of Physics, lotoa State Unieersity, Ames, iowa (Received 7 June ) P-center luminescence spectra have been measured at 78'Kin NaC1, KC1, KBr, KI, RbCl, and CsBr.

The pressure has been calculated at different relative non-isothermal compression volume ranges (1–) at different temperatures from T = to temperature close to the melting temperature for solid alkali halides (NaF, NaCl, NaBr and NaI) using the Kumar General EOS Eq.

The input parameters are listed in Table relationships between compression and pressure (P) at Author: Ibtisam Y. Alkammash. The parameterC 1=[∂(1/K T)/∂P]T, which describes the pressure variation Internal pressure in alkali halides.

book the compressibility, has been examined correlating the thermodynamical and interatomic potential approaches employing fewer approximations than has been usual heretofore. Also, the relationship αT m = hold true for molten alkali halides, similar to the relationship for polymer melts.

An attempt has been made to find the isochoric contribution from the temperature coefficient of volume expansivity, internal pressure on the sound speed in the molten by:   Eq.

due to Gilvarry and Lindemann, and Eq. due to Stacey and Davis have been used to calculate the pressure derivatives of mel The results are given in Table 2 and compared with the experimental data.A special feature of the present calculations is that the values of γ m, α m and K T m at T=T m (given in Table 1) have been determined corresponding to melting temperature of alkali halides.

Single crystals of alkali halides doped with BH − 4 and BD − 4 were grown from the melt. Previously unreported bands in the infrared spectra of BH − 4 and BD − 4 isolated in different alkali halides are interpreted in terms of summation bands of internal and external modes of vibration.

This has allowed the torsional and translational modes of the impurity ion to be identified. Internal pressure in the alkali-halides The alkali halides are compressible enough to allow an evaluation of the parameters a and p'/ Vo from the measurements by Bridgman.

The results of an earlier evaluation [4] are reproduced in Table I. The parameters of the Na- and Cs-halides. Books. Publishing Support. Login. Reset your password. If you have a user account, you will need to reset your password the next time you login.

You will only need to do this once. Find out more. IOPscience login / Sign Up. Please note. The internal pressure parameter α, first derived from the compressibility of metals and alkali-halides, is interpreted as α = dW/dV where W is the potential energy and V the volume.

This expression enables the evaluation of α from measurements on thermal energy and thermal expansion. With now available experimental results α-values can in this way be obtained for most metals at ordinary.

The effect of pressure and temperature has been measured on the ``A''. bands in KI:Tl and in three alkali halides containing Pb++ impurity. The effect of temperature is to impose a red shift on the. Pressure variation of melting temperatures of alkali halides Article in International Journal of Modern Physics B 31(05) November with 36 Reads How we measure 'reads'.

17 Harold H. Demarest, Extrapolation of elastic properties to high pressure in the alkali halides, Journal of Geophysical Research,77, 5, Wiley Online Library 18 Harold H. Demarest, Lattice model calculations of elastic and thermodynamic properties at high pressure and temperature, Physics of the Earth and Planetary Interiors, The surface tension of alkali halide melts has been correlated with the bulk modulus and with the internal pressure.

These are similar to those found earlier for liquid metals. The relationships, along with the volume expansion coefficients, can be used to calculate. stant pressure, spherical droplets of a liquid phase are formed in it [9]. These droplets (hereafter, clusters) T 0 Specific Heats of Alkali Metal Halides and Universal Estimates of the Surface Tension of Their Melts Based on the Thermal Properties of Critical Clusters A.

Cherevko Siberian State University of Telecommunications and. Purchase Alkali Halide Vapors - 1st Edition. Print Book & E-Book. ISBNAlkali Halide Vapors: Structure, Spectra, and Reaction Dynamics highlights the various studies done in the subject area of alkali halide chemistry. These studies have resulted to providing many relevant insights and paving the way for the study of more complex chemical systems.

This book ultimately reviews and summarizes the said studies. Some theoretically derived parameters have also been included.

All the important literature from to has been surveyed. Providing in a single volume all essential information on the physical properties of alkali halides, this book will be a valuable reference for solid-state physicists and materials scientists.

acid (COO-) Hence it is found that the present study shows there is variation in the internal pressure of the three halides. Key words: Alkali Halide, Amino Acids, Ultrasonic, Internal Pressure.

_____ INTRODUCTION Isoleucine (abbreviated as Ile or I) is an α-amino acid with the chemical. Alkali metal halides, or alkali halides, are the family of inorganic compounds with the chemical formula MX, where M is an alkali metal and X is a compounds are the often commercially significant sources of these metals and halides.

The best known of. Equation 1 has been checked against all the alkali halides, and the calculated values were found in good agreement with the reported data (Table 1) [7,[10][11] [12] [13][14][15][16][17][18][19][ High-Pressure Phase Transition in Some Alkali Halides Using Interatomic Potential Model Harun Re˘sit YAZAR Department of Physics, K r kkale University,Yah˘sihan, K r kkale-TURKEY e-mail: [email protected] Received Abstract We have predicted the phase transition pressure in some alkali halides NaCl and KCl using an.

@article{osti_, title = {Potential function and dissociation energy of alkali halide}, author = {Srivastava, Abhay P. and Pandey, Brijesh K., E-mail: [email protected] and Pandey, Anjani K.}, abstractNote = {Dissociation energy of some alkali halides have been calculated by using different interaction potential function such as Born-Mayer, Varshani-Shukla and L{sub 5} potential model.

@article{osti_, title = {High-pressure melting curves of alkali halides}, author = {Boehler, R and Ross, M and Boercker, D B}, abstractNote = {The melting curves of CsI, KCl, and KBr were measured in a diamond-anvil cell to temperatures of K and pressures up to kbar.

pressure P are given in Table 2 along with the volumes versus pressure for sixteen alkali halides. It Table 2 — Melting temperatures for sixteen alkali halides at different pressures calculated using the Lindemann– Gilvarry model (Eq. 15) LiF LiCl P(GPa) V/V0 Tm(K) GPa) P(V/V0 Tm(K) 0 1 0 1 The thermal conductivities of molten alkali fluorides (LiF, NaF, and KF) and their mixtures (LiF–NaF, LiF–KF, and NaF–KF binaries and LiF–NaF–KF ternary) are predicted using molecular dynamics simulation with the Green–Kubo method.

A polarizable ion model is used to describe the interionic interactions. All the systems except LiF–KF and LiF–NaF–KF mixtures follow a scaling. Internal pressure in solids Internal pressure in solids Borelius, Gudmund GUDMUND BORELIUS Royal Institute o Technology, Stockholm, Sweden f The content of this contribution has been fully treated in the following publications: G.

Borelius, â The Internal Pressure in Alkali Metals and Alkali Halides,â Arkiv for Fysik, 28, (). The melting curves of the alkali chlorides and the sodium halides have been determined at high pressures.

Book Search tips Selecting this option will search all publications across the Scitation platform Selecting this option will search all publications Effect of Pressure on the Melting Points of Eight Alkali Halides J.

Chem. Phys. alkali halides under pressure [1], as well as for the use of alkali halides as reference materials. in pressure determinations with high-pressure x-ray diffraction, it appeared necessary to. Since superconducting film thermal detectors are used, this temperature must be compatible with the operating temperature of the detector used (approx.

°K). This condition is approximately met by several of the alkali halides. For aqueous solutions of the alkali halides 27 having a given cation, the osmotic coefficient increases with the anion size (the crystal radius 28).For example, the osmotic coefficient increases in the order LiCl.THE variation with pressure of the dielectric constant of the alkali halides has been measured, for selected salts, by Mayburg1 and Jarman2, whose work is summarized in Table 1.

Jarman deduced.F-center luminescence spectra have been measured at 78°K in NaCl, KCl, KBr, KI, RbCl, and CsBr under hydrostatic pressure to kbar. From a comparison between the shift of the emission peak with pressure and the shift with temperature, it is concluded that most of the latter arises from the electron-lattice interaction and not from thermal expansion.