Materials Literature
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Abstract An investigation has been made of occlusion of O2, A and N2, and of CH4, C2H6, C3H8, n- and iso-C4H10, n-, iso- and neo-C5H12, n-C6H14, n-C7H16, n-C8H18 and iso-C8H18 within the crystal lattice of dehydrated synthetic faujasite (Na2O. Al2O3. 2·67SiO2. mH2O). The three permanent gases are selectively occluded…
Abstract The absorption spectra of eight type I and three type IIa diamonds irradiated with neutrons, electrons or y-rays have been recorded at 80 and 290°K after various heat treatments in the temperature range 0 to 900°C. It is found that heating in the range 350 to 450°C causes a general reduction in the irradiatio…
For the purpose of studying the relation of magnetostriction to technical magnetization, we used a strain gauge to measure the magnetostriction of long rod single crystals of 3.2% Si-Steel, and compared the results with those which had formerly been obtained on the same samples by using a mechano-optical lever. The la…
The experimental data observed by Smith and Rasor in measuring the low-temperature thermal conductivity of several types of graphites are interpreted on the basis of a two-medium theory. The theory assumes that, in the artificial polycrystalline graphites, the nongraphitic regions are isotropic thermal conductors and…
Magnetic properties of complex salts containing paramagnetic ions of transition elements are studied on the crystalline field model. Strong cubic crystalline field splits d -orbital into d γ and d ε , and the magnetism is due to incomplete d ε shells. The crystalline field is assumed to have, besides cubic part, a com…
The determination of crystal structure was performed on the ferromagnetic nickel oxide obtained by the flame fusion method. Apart from a slight deviation of axial angle from 90°, it has a defect tetragonal structure belonging to the space group I 4 1 / amd ( D 4 h 19 ), the lattice constants being a =5.899 6 kX. and c…
The thermal conductivity of various graphites in the temperature interval 10\ifmmode^\circ\else\textdegree\fi{} to 300\ifmmode^\circ\else\textdegree\fi{}K has been determined and the effect of neutron irradiation and bromination investigated. The thermal conductivity of large crystallite natural graphite and of nonpit…
Received 19 September 1956DOI:https://doi.org/10.1103/PhysRev.104.1191©1956 American Physical Society
Manganous sulfide exists in three polymorphic forms. There are two cubic modifications, $\ensuremath{\alpha}$-MnS having the rock salt structure and $\ensuremath{\beta}$-MnS with the zinc blende structure. The third form is hexagonal $\ensuremath{\beta}$-MnS with the wurtzite structure. The magnetic susceptibilities o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnesium PolymetaphosphateR. Pfanstiel and R. K. IlerCite this: J. Am. Chem. Soc. 1956, 78, 21, 5510–5511Publication Date (Print):November 1, 1956Publication History Published online1 May 2002Published inissue 1 November 1956https://pubs.acs.org/doi/10.1021/ja01602a014https…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallographic Data. 139. 2-Amino-2-methyl-1,3-propanediolH. A. Rose and Ann. Van CampCite this: Anal. Chem. 1956, 28, 11, 1790–1791Publication Date (Print):November 1, 1956Publication History Published online1 May 2002Published inissue 1 November 1956https://pubs.acs.org/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies on the Chemistry of Halogens and of Polyhalides. IX. Electrical Conductance Study of Higher Polyiodide Complex Ions in Acetonitrile Solutions1,2Alexander I. Popov, Ralph H. Rygg, and Norman E. SkellyCite this: J. Am. Chem. Soc. 1956, 78, 22, 5740–5744Publication Date…
Abstract Das Verfahren zur Darstellung des als Rohsulfan bezeichneten, aus Na 2 S x −Lösungen mit Salzsäure zu erhaltenden Sulfangemisches wurde weiter entwickelt mit dem Ziele, laufend größere Mengen des Öles im Laboratorium zu gewinnen. Der Einfluß verschiedener Faktoren auf die Ausbeute und auf die Zusammensetzung…
Under similar conditions of transient loading the cavitation thresholds of syrup and olive oil are 130 × 10 6 dyne/cm 2 and 29 × 10 6 dyne/cm 2 respectively. For fluids with a viscosity (η) in the range 0.01 to 400 P the cavitation threshold pressure P c is given by the empirical relation P c = κη 0.2 . This result ca…
Minerals of the serpentine family are essentially divisible into two groups: chrysotile and antigorite types (the latter includes antigoritieal serpentines). Throughout, they are two-layer minerals. Their layers are formed by combining of a Si 2 O 5 layer and a brucite [ Mg ( OH ) 2 ]-like layer. The chemical formula…
Article Bemerkungen zur Systematik der Kristallstrukturen von Silikaten mit hochkondensierten Anionen was published on November 1, 1956 in the journal Zeitschrift für Physikalische Chemie (volume 206O, issue 1).
Some simple methods of preparing MgO thin films on Mg–Ag alloy with high secondary emission ratios are discussed. The oxidation procedure and a discussion of the underlying phenomena are presented. Films with a secondary yield of 12 at 600 v may be produced by oxidation in either oxygen or carbon dioxide. Results of a…
Abstract The effect of network density on pyrolysis of polymers and copolymers of styrene, divinylbenzene, and trivinylbenzene was studied over a wide range of temperature. Thermal stability of polymers and size of carbon residues increased with crosslink concentration as volatilization rates declined. Rate of gas evo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical Investigation of Foam DrainageW. M. Jacobi, K. E. Woodcock, and C. S. GroveCite this: Ind. Eng. Chem. 1956, 48, 11, 2046–2051Publication Date (Print):November 1, 1956Publication History Published online1 May 2002Published inissue 1 November 1956https://pubs.acs.o…
ABSTRACT The potentiality of clay minerals as useful indicators of the environment of their formation is summarized from the published literature on the origin of clay minerals. Caution must be observed when drawing geologic inferences from a rock or mineral concerning its origin because the rock or mineral may not ha…