SONIC STUDIES OF THE PHYSICAL PROPERTIES OF LIQUIDS. II. THE VELOCITY OF SOUND IN SOLUTIONS OF CERTAIN ALKALI HALIDES AND THEIR COMPRESSIBILITIES

1931 ◽  
Vol 53 (4) ◽  
pp. 1313-1320 ◽  
Author(s):  
Egbert B. Freyer
Keyword(s):  
Physical Properties ◽  
Alkali Halides ◽  
Velocity Of Sound

The relationship between crystal ionicity and some physical properties of the alkali halides

1975 ◽  
Vol 142 (3-4) ◽  
Author(s):  
Sergio Deganello
Keyword(s):  
Thermal Expansion ◽  
Potential Energy ◽  
Physical Properties ◽  
Linear Dependence ◽  
Alkali Halides ◽  
Quantitative Prediction ◽  
Interatomic Distances ◽  
Crystal Properties ◽  
Thermal Vibrations ◽  
The Relationship

AbstractIn the alkali halides a linear dependence is found between the values of crystal ionicity, spectroscopically determined, and crystal properties such as interatomic distances, potential energy and amplitudes of atomic vibration. Such a correlation appears to allow a quantitative prediction of coefficients of thermal expansion and amplitudes of thermal vibrations of the atoms.

scholarly journals Ultrasonic Properties of Plastically Deformed Ice

1975 ◽  
Vol 15 (73) ◽  
pp. 161-169 ◽  
Author(s):  
J. Tatibouet ◽  
R. Vassoille ◽  
J. Perez
Keyword(s):  
Plastic Deformation ◽  
Physical Properties ◽  
Sound Velocity ◽  
Single Crystals ◽  
Stress Waves ◽  
Ultrasonic Waves ◽  
Velocity Of Sound ◽  
Propagation Characteristics ◽  
Ultrasonic Properties ◽  
Crystalline Materials

AbstractMany authors have used propagation of ultrasonic waves in ice for glaciological studies. This propagation is characterized by the velocity of sound and by the attenuation of stress waves. In crystalline materials, these two characteristics depend on structural slate. In particular plastic deformation gives velocity and attenuation variations.We have measured the sound velocity and attenuation of ultrasonic waves in strained specimens of ice (single crystals and polycrystals). These measurements done between 100 and 273 K at a frequency of 5 MHz show that plastic deformation leads to an increase of attenuation arid an increase of velocity. Annealing treatments at 271 K cause recovery of propagation characteristics. The variation in attenuation can be interpreted by the theory of dislocations and this interpretation is supported by our data on the influence of frequency on this increase of attenuation induced by plastic deformation, but the theory of dislocations implies a decrease of modulus, i.e. of velocity, hence we must postulate that an added phenomenon screens the effect of dislocations. That phenomenon could be connected with ageing effects observed on different physical properties of ire and may be due to modification of protonic arrangement or creation of interstitials during plastic deformation. Thus our experiments show that it is necessary to be careful in using results determined from the propagation of ultrasonic waves in ice.

VII. The influence of stress and strain on the physical properties of matter. Part I. Elasticity— continued . The velocity of sound in metals, and a comparison of their moduli of torsional and longitudinal elasticities as determined by statical and kinetical methods

1887 ◽  
Vol 42 (251-257) ◽  
pp. 362-364
Keyword(s):  
Physical Properties ◽  
Stress And Strain ◽  
Velocity Of Sound

The principal object of the investigation was to ascertain whether the values of the moduli of torsional and longitudinal elasticities, as determined by statical methods, would be the same as when determined by kinetical methods, provided the deformations produced were very small.

Physical properties of mixed crystals of alkali halides

1986 ◽  
Vol 21 (12) ◽  
pp. 4117-4130 ◽  
Author(s):  
D. B. Sirdeshmukh ◽  
K. Srinivas
Keyword(s):  
Physical Properties ◽  
Alkali Halides ◽  
Mixed Crystals

Coordination numbers and physical properties in molten salts and their mixtures

2016 ◽  
Vol 190 ◽  
pp. 471-486 ◽  
Author(s):  
Dario Corradini ◽  
Paul A. Madden ◽  
Mathieu Salanne
Keyword(s):  
Relaxation Time ◽  
Physical Properties ◽  
Metal Cations ◽  
Alkali Halides ◽  
Coordination Shell ◽  
Atomic Scale ◽  
Trivalent Metal ◽  
Shear Relaxation ◽  
Glass Forming Materials ◽  
The Relationship

Mixtures of trivalent metal halides with alkali halides are involved in many technologies but, from a more fundamental and general perspective, are worthy of study as interesting systems in which to examine the relationship between atomic-scale structure and physical properties. Here we examine the relationship between the viscosity and local and longer range structural measures in such mixtures where the trivalent metal cations span a significant size range and exhibit different behaviours in the dependence of their viscosity on the mixture composition. We characterise the structure and dynamics of the first coordination shell and the relationship between its structural relaxation time and the shear relaxation time of the mixture (the Maxwell relaxation time). We are then led to an examination of the structure of the networks which progressively form between the trivalent metal cations as their concentration increases in the mixtures. Here we find significant differences between small and larger cations, sufficient to explain the different behaviour of their viscosities. We draw attention to the similarities and differences of these networks with those which form in highly viscous, glass-forming materials like BeF2:LiF.

scholarly journals The influence of strees and strain on the physical properties of matter. Part I. Elasticity— continued . The velocity of sound in metals and a comparison of their moduli of longitudinal and torsional elasticities as datermined by statical and kinetical methods

1888 ◽  
Vol 43 (258-265) ◽  
pp. 88-108
Keyword(s):  
Physical Properties ◽  
The Other ◽  
Velocity Of Sound ◽  
Heating And Cooling ◽  
Transverse Vibrations ◽  
Cooling Effects

We owe to Wertheim a series of carefully executed experiments on the longitudinal elasticity of metals both by statical extension and by longitudinal and transverse vibrations. Prom these researches it would appear that the values of the moduli of longitudinal elasticity as determined for several metals by the first of these three methods are, as might be expected, less than those obtained by the other two. The differences, however, are very much greater than can be accounted for by the heating and cooling effects of contraction and elongation, and the author has already pointed out what he believes to have been in a great measure the cause of these discrepancies.

A Physical Model of Molten Salt Data

2008 ◽  
Vol 63 (7-8) ◽  
pp. 462-466 ◽  
Author(s):  
Alexander Redkin ◽  
Yurii Zaikov ◽  
Olga Tkatcheva ◽  
Anatoly Shuryghin
Keyword(s):  
Physical Properties ◽  
Molten Salt ◽  
Molar Volume ◽  
Physical Model ◽  
Alkali Halides ◽  
Ionic Systems ◽  
Property Changes

Molten alkali halides can be regarded as model ionic systems. Physical properties of molten alkali halides and their mixtures depending on molar volume and temperature are considered. The properties under examination are divided into two groups: cation-dependent and anion-dependent ones. The character of property changes with temperature and molar volume is different for these groups.

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