Correlation Between Physical Properties of Metal Pairs and Magnitude Sequence of Young's Moduli and Melting Points

2007 ◽  
Vol 49 (10) ◽  
pp. 550-551
Author(s):  
Alfred Buch
Keyword(s):  
Physical Properties ◽  
Melting Points ◽  
Young’S Moduli

Structural, Electronic and Mechanical Properties of Perovskite Oxides LaMO3 (M = Mn, Ni) Compounds in the High and Low Symmetric Phases by First Principle Calculation

2018 ◽  
Vol 941 ◽  
pp. 2300-2305
Author(s):  
Oussama Bachir Bouiadjra ◽  
Ghouti Merad ◽  
Jean Marc Raulot ◽  
Hayet Si Abdelkader ◽  
Claude Esling
Keyword(s):  
Mechanical Properties ◽  
Transition Metal ◽  
Physical Properties ◽  
Transition Metal Oxides ◽  
Density Functional ◽  
Perovskite Oxides ◽  
Advanced Technology ◽  
First Principle Calculation ◽  
Young’S Moduli ◽  
Long Time

The widely investigated perovskite oxides has attracted for a long time a great interest on the physical properties, in their bulk structures as well as the heterostructures components. The Lanthanum transition metal oxides LaMO3(M= Transition metal) is part of, due to their potential use in advanced technology (including superconductivity, magnetoresistance, ionic conductivity, and a multitude of dielectric properties). Despite the broad exploration of the physical properties, we found a considerable lack in the investigation of the mechanical properties of the LaMO3compounds. By applying the Density Functional Theory (DFT), we shed light on the structural, electronic, and especially mechanical properties of the experimentally verified phases of The LaMnO3, and LaNiO3. We first calculated the structural and electronic properties, then we continue with the single-crystal elastic constants and mechanical properties, where the bulk, shear and Young’s moduli, and the Anisotropy indexes were deduced, in order to remedy the existing gap of the theoretical knowledge about the mechanical behavior of the LaMnO3, and LaNiO3compounds.

scholarly journals VI.—Bakerian Lecture.—The specific heats of metals, and the relation of specific heat to atomic weight

1900 ◽  
Vol 194 (252-261) ◽  
pp. 233-255 ◽  
Keyword(s):  
Physical Properties ◽  
Specific Heat ◽  
Pure State ◽  
Atomic Weight ◽  
Melting Points ◽  
Specific Heats ◽  
The Subject ◽  
The Difference ◽  
Melting And Solidification ◽  
Cobalt And Nickel

The experiments recorded in the following pages were begun nearly five years ago, at a time when opinion was still much divided as to the atomic weight of cobalt and nickel. It seemed to me that it would be a step in advance if it could be settled which of the two is the greater, for while perhaps the majority of chemists represented the atomic weight of cobalt as greater than that of nickel, some still assigned to them both the same value, while Mendeleeff did not hesitate to invert the order by making Co = 58·5 and Ni = 59. After taking into account all the best evidence on the subject, it appears certain that the atomic weight of cobalt is greater than that of nickel, but the fact remains that the values differ from each other by an amount which is less than the difference between any other two well established atomic weights, the respective numbers being variously represented by different authorities as follows :— The object of my experiments, however, soon developed into a wider field, for it appeared that the results obtained with these two metals might be made the means of further testing the validity of the law of Dulong and Petit, inasmuch as temperatures at which the specific heats would he determined are not only very remote, hut about equally remote, from the melting points of these two metals. Both metals are now obtainable in a pure state, and after melting and solidification under the same conditions are presumably in the same state of aggregation. Their atomic weights, though not known exactly, are undoubtedly very near together, as are also the densities of the metals and other of their physical properties.

Some physical properties of long chain hydrocarbons

1986 ◽  
Vol 64 (3) ◽  
pp. 481-483 ◽  
Author(s):  
L. T. Chu ◽  
Carmen Sindilariu ◽  
Aaron Freilich ◽  
Vojtech Fried
Keyword(s):  
Refractive Index ◽  
Physical Properties ◽  
Excess Volumes ◽  
Refractive Indices ◽  
Melting Points ◽  
Entire Concentration Range ◽  
Excess Viscosities ◽  
Long Chain

The densities, refractive indices, and viscosities of liquid n-nonadecane and n-nonadecyl benzene were investigated at temperatures not too far above their respective melting points. Except for the viscosities, no significant differences were observed in the behavior of the two hydrocarbons. The n-nonadecane + n-nonadecyl benzene system exhibits small positive excess volumes and small negative excess viscosities. The excess refractive index is zero in the entire concentration range.

XII. Relations between the atomic weights and certain physical properties (melting and boiling points and heats of formation) of elements and compounds

1879 ◽  
Vol 29 (196-199) ◽  
pp. 190-192 ◽  
Keyword(s):  
Periodic Function ◽  
Physical Properties ◽  
Heats Of Formation ◽  
Melting Points ◽  
Boiling Points ◽  
Halogen Compounds ◽  
Constituent Elements

The object of the present paper is to trace the influence of the atomic weights on the melting and boiling points and heats of formation of elements, and especially of their compounds. It is shown that, as regards the elements, the melting points are a periodic function of their atomic weights, whilst, for compounds, the following conclusions are drawn:— I. That the melting and boiling points and heats of formation of the s normal halogen compounds of the elements are a periodic function of the atomic weights of the constituent elements.

scholarly journals Correlation of Elastic Moduli and Serpentine Content in Ultramafic Rocks

Geosciences ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 494
Author(s):  
Aida Farough ◽  
Alexander K. Karrasch
Keyword(s):  
Physical Properties ◽  
Subduction Zones ◽  
Elastic Moduli ◽  
Oceanic Lithosphere ◽  
Ultramafic Rocks ◽  
Seismic Velocities ◽  
Rock Composition ◽  
Brittle Behavior ◽  
Young’S Moduli ◽  
Thin Crust

Understanding the physical properties of ultramafic rocks is important for evaluating a wide variety of petrologic models of the oceanic lithosphere, particularly upper mantle and lower crust. Hydration of oceanic peridotites results in increasing serpentine content, which affects lithospheric physical properties and the global bio/geochemical cycles of various elements. In understanding tectonic, magmatic, and metamorphic history of the oceanic crust, interpreting seismic velocities, rock composition, and elastic moduli are of fundamental importance. In this study, we show that as serpentine content increases, density decreases linearly with a slope of 7.85. Porosity of the samples does not show any systematic correlation with serpentine content, as it is more strongly affected by local weathering and erosional processes. We also correlate increase in serpentine content with a linear decline in shear, bulk, and Young’s moduli with slopes of 0.48, 0.77, and 0.45, respectively. Our results show that increase in serpentine content of mantle wedge and forearc mantle contributes to their brittle behavior and result in break-offs, obduction, and overthrusting. Therefore, serpentine content strongly affects tectonic processes at subduction zones, particularly serpentinization may be responsible for formation of weak fault zones. Also, serpentinization of fresh oceanic peridotite in slow and ultra-slow spreading ridges may be responsible for observed discontinuities in thin crust.

Novel phosphorus-containing halogen-free ionic liquids: effect of sulfonate anion size on physical properties, biocompatibility, and flame retardancy

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 52485-52494 ◽  
Author(s):  
Qiu-Xia He ◽  
Liang Tang ◽  
Teng Fu ◽  
Yue-Quan Shi ◽  
Xiu-Li Wang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Ionic Liquids ◽  
Physical Properties ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
Melting Points ◽  
Phosphorus Containing ◽  
Halogen Free ◽  
Sulfonate Anion

Phosphorus-containing sulfonate ILs with different anions size present different thermal stability, solubility, viscosity, melting points, and cytotoxicity. They show flame retardant effect for PA6 via accelerating decomposition of matrix.

scholarly journals II. Researches upon the specific volumes of liquids

1876 ◽  
Vol 24 (164-170) ◽  
pp. 298-308
Keyword(s):  
Molecular Weight ◽  
Physical Properties ◽  
Specific Volume ◽  
Arithmetic Mean ◽  
Iodine Monochloride ◽  
Melting Points ◽  
Molecular Weights ◽  
Boiling Points ◽  
Two Bodies ◽  
Specific Volumes

The molecular weight of bromine is, as is well known, nearly equal tc the arithmetic mean of the molecular weights of chlorine and iodine hence the molecular weights of bromine and of iodine monochloride (I Cl are nearly identical. These substances closely resemble each other ii physical properties. Both are dark-red liquids about three times heavie: than water. Bromine boils at about 59°-5, and solidifies at —240,5 iodine monochloride melts at +24°·5, and boils at 101°: the intern between the boiling- and melting-points of the two compounds is approximately equal. It appeared to me of interest to determine (1) if the specific volume of these liquids exhibit a relation similar to that which is shown by their molecular weights, and (2) if the relation in their specific volumes i preserved in analogous combinations of the two bodies. I have accordingly determined the specific gravities, boiling-points, and rates of expansion of bromine and iodine monochloride, and of the compound which these substances form by their union with ethene, C 2 H 4 . Th observations will also serve to determine if bromine and iodine mono chloride preserve, when in combination, the volumes which they posses in the free state.

scholarly journals Synthesis and Characterization of New heterocyclic Polyacrylamides from Derivatives 2-Aminobenzothiazole

2014 ◽  
Vol 11 (2) ◽  
pp. 407-418
Author(s):  
Baghdad Science Journal
Keyword(s):  
Physical Properties ◽  
1H Nmr ◽  
Synthesis And Characterization ◽  
Melting Points ◽  
Ft Ir ◽  
Ethyl Amine ◽  
Structure Confirmation

The present work involved preparation of new hetro cyclic polyacrylamides (1-9) using reaction of polyacryloyl chloride with 2-aminobenzothiazole which prepeard by thiocyanogen method in the presence of a suitable solvent and amount tri ethyl amine (Et3N) with heating. The structure confirmation of polymers were proved using FT-IR,1H-NMR,C13NMR and UV spectroscopy.Other physical properties including softening and melting points, and solubility of the polymers were also measured.

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