Materials Literature
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The electrostatic contribution to the lattice energy of some ordered spinels is calculated. It is made plausible that also in the case of certain spinels that do not show any long-range ordering, a considerable amount of short-range order is to be expected. As a consequence the lattice energy of ``inversed'' spinels c…
Abstract Durch gemeinsames Tempern der entsprechenden Sulfide und Halogenide des dreiwertigen Antimons und Wismuts unter Luftabschluß wurden Kristalle folgender Thiohalogenide dargestellt: Sb 4 S 5 Cl 2 , SbSBr, SbSJ, BiSCl, BiSBr und BiSJ. Die Präparate kristallisieren rhombisch‐holoedrisch mit vier Molekülen in der…
ADVERTISEMENT RETURN TO ISSUEPREVArticleThe Determination of Bond Dissociation Energies by Pyrolytic Methods.M. SzwarcCite this: Chem. Rev. 1950, 47, 1, 75–173Publication Date (Print):August 1, 1950Publication History Published online1 May 2002Published inissue 1 August 1950https://doi.org/10.1021/cr60146a002Request r…
The effects of stress on the internal structure and energy characteristics of metals are discussed with relationship to their influence on corrosion reactions. The nature and importance of residual stresses and the non-homogeneity of worked metals are emphasized. Recent concepts of the nature of grain boundaries are r…
Abstract In 2 S 3 wurde mit BeS, MgS, CaS, SrS, BaS, ZnS, CdS, HgS, SnS, PbS, TiS, VS, CrS, MnS, FeS, CoS und NiS im molaren Verhältnis 1:1 bei Temperaturen zwischen 900 und 1200° C umgesetzt. Bei sämtlichen Versuchen wurde eine Umsetzung beobachtet. Eindeutig wurde jedoch nur die Bildung der Verbindungen MgIn 2 S 4 ,…
A systematic treatment is given of the energies and widths of domain boundaries in ferromagnetics; it covers cubic crystals, with positive or negative magneto-crystalline anisotropy coefficients, and crystals with a single easy direction of magnetization. This extends the investigations of Bloch (1932), Landau and Lif…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanical Properties of Substances of High Molecular Weight. VI. Dispersion in Concentrated Polymer Solutions and its Dependence on Temperature and ConcentrationJohn D. FerryCite this: J. Am. Chem. Soc. 1950, 72, 8, 3746–3752Publication Date (Print):August 1, 1950Publicatio…
Abstract Vor 10 Jahren wurde das erste magnetische und das erste elektrostatische Übermikroskop von den Berliner Entwicklungsstellen der Praxis übergeben. Die deutsche Forschungs‐ und Entwicklungsarbeit findet jetzt ihre internationale Unterstreichung dadurch, daß in Paris vom 14. bis 22. September 1950 ein internatio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMutual Solubilities of Hydrocarbons. III. Systems cis-Decahydronaphthalene—trans-Decahydronaphthalene, cis-Dehydronaphthalene—Tetracosane, cis-Decahydronaphthalene—DotriacontaneWilliam F. Seyer, Sun Yip, and Gordon PyleCite this: J. Am. Chem. Soc. 1950, 72, 7, 3162–3164Publi…
Measurements have been made of the magnetic susceptibility of fairly pure uranium and of 5 and 10 atomic per cent alloys of iron with uranium. Using a modification of the Curie method, with special pole-pieces and electromagnetic dynamometer control, the specimens were found to be paramagnetic with no trace of ferroma…
The formal theory, based on the concept of thermal activation of domain processes, previously proposed to account for the phenomenon of magnetic viscosity, has been extended to describe time decrease of permeability Within certain limits the predictions of the theoretical analysis are verified by measurements made on…
Repu/e 8 dgcembre 1949
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Thomas F. Anderson; The Use of Critical Point Phenomena in Preparing Specimens for the Electron M…
Recent experiments by Warburg in collaboration with B. S. Hendricks and Dean Burk of the National Cancer Institute were conducted on the maximum quantum efficiency of photosynthetic processes which have been disputed since the middle 1930's. These latest experiments, unfortunately, are not included in the last chapter…
Es wird uber die Entdeckung eines Magnesiumwasserstoffs, MgH 2 , berichtet, der durch thermische Zersetzung von Magnesium-dialkylen oder durch Umsetzung von Magnesium-dialkylen mit Diboran darstellbar ist und eine weiße, feste, wasserempfindliche, nicht selbstentzundliche, ätherunlösliche, nicht flüchtige und im Vakuu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeat Capacities at Low Temperatures and Entropies of Zirconium, Zirconium Nitride, and Zirconium TetrachlorideS. S. ToddCite this: J. Am. Chem. Soc. 1950, 72, 7, 2914–2915Publication Date (Print):July 1, 1950Publication History Published online1 May 2002Published inissue 1 J…
fl form corresponds to the simple formula To(CHa)zI ~.The demonstration of our supposition could explain the anomaly observed in the determination of the number of molecules per unit cell.Further investigations are being carried out.
This paper presents a study of the sequence of events by which cracks ``grow.'' A careful investigation was made of the origin, development, and characteristic pattern of level-difference markings left by rapidly moving fractures in a wide variety of materials. Characteristic markings indicating discontinuous propagat…
It is shown that lattice parameters of non-cubic crystals can be accurately determined by linear extrapolation against the function ½(cos e 0/sin 0-b cos ~ 0/0) by selecting lines with suitable indices.Use can be made of the slope of the extrapolation curve of one of the parameters to derive the slope of the extrapola…
One measure of the filamentous algae present in a microscope field is the total length of all the algal filaments. This is usually estimated by superimposing a measuring grid upon the field either by a micrometer eyepiece or a ruled counting cell. The inherent difficulty in such a method is in estimating lengths of se…