Materials Literature
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Benavidesite, Pb4(Mn, Fe)Sb6S14 with Mn > Fe, is a new mineral which belongs to the jamesonite serie. It has been simultanously discovered in Uchucchacua (Peru) and in Sàtra (Sweden). Benavidesite is monoclinic, probable space group is P21/a with a = 15.74, b = 19.14, c = 4.06 Â, P = 91.5°, Z = 2, dcalc = 5.60. Mai…
Abstract An electron microscope observation was made on the binary Sm‐Co alloy. One‐dimensional lattice images of Sm 5 Co 19 taken with the incident beam parallel to the [010] and [110] directions of the hexagonal axis showed many stacking faults. The intergrowth with the Sm 2 Co 7 phase was observed in the matrix of…
The soil has mechanisms which serve as buffers or ionic reservoirs which remove nutrient ions from and return them to the soil solution and thus regulate their availabilities to higher plants. Yet relative amounts of each type of cation‐exchange bond are evidently so different from soil to soil that basic cation satur…
Modern railway transportation, progressing towards ever higher speeds, higher axle loads and greater traffic volumes, places high demands on rail steel. The rails should have a high resistance to wear and fatigue, be weldable, and display safety against fracture.Steel producers have met these requirements with the hel…
A new electrovac with λ type D solution and with both Debever–Penrose vectors aligned along the real eigenvectors of the electromagnetic field is presented. The principal null directions are shearing and twisting. The existence of this solution, endowed with an O(2,1,R) symmetry, requires λ<0.
The removal of methyl iodide by adsorption onto silver mordenite was studied using a simulated off-gas from the fuel dissolution step of a nuclear fuel reprocessing plant. The methyl iodide adsorption of partially exchanged silver mordenite was examined for the effects of NO/sub x/, humidity, filter temperature, and d…
The crystal structure of a new sulfosalt, Tl 5 Sb 5 As 8 S 22 , has been determined. The crystal is monoclinic with space group P 2 1 / c . Four formula units are contained in a unit cell of dimensions a 0 = 17.441(5), b 0 = 7.363(2) and c 0 = 32.052(7) Å, β = 105.03(7)°. The structure was determined by direct methods…
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A new low-carbon 16Cr-5Ni stainless martensitic cast steel (S + C 4405) is presented as an advancement of CA6NM with improved corrosion resistance, excellent ductility, less susceptibility to hardening cracks, and good weldability, filling the gap between CA6NM and CF8M. The chemical composition is balanced so that a…
Dissolution at metal surfaces may be structurally or non-structurally dependent. The effects of grain boundaries, interfaces between discrete phases, non-metallic inclusions, and slip lines in promoting structurally dependent attack are considered in the context of a variety of metal-environment systems. Pitting and f…
Rare earth doping of CaF2 produces material which gives strong thermoluminescence signals. In an attempt to separate the influence of impurity and intrinsic defects CaF2 has been implanted with ions of Ce, Dy, Mn, Ca and F. Comparisons are made with chemically doped samples and the effect of thermal treatments have be…
The reaction of N4P4Cl8(1) with sodium phenoxide (or phenol in the presence of triethylamine) has been studied under a variety of experimental conditions. The chloro(phenoxy)-derivatives, N4P4Cl8–n(OPh)n[n= 1 or 2 (mixture of four non-geminal isomers), 3(mixture of non-geminal isomers), 4(mixture of isomers), 5(mixtur…
Structural, thermodynamic, and kinetic properties and phase diagrams of hydrogen in metals and alloys are presented in relation to materials development for the ‘hydrogen energy technology'. Among the materials considered special attention is paid to the hydrides of Li, Mg, Y, V, Nb, U, TiFe, and LaNi5. It is shown ho…
Abstract Symmetric and asymmetric EC cells are here fabricated using amorphous W0 3 ‐Mo0 3 ‐V 2 0 5 films vacuum‐evaporated on substrates prepared in electrolyte of lithium perchlorate and propylene carbonate. Dependences of the reflection spectra of symmetric cells and the transmission spectra of asymmetric cells on…
Unmodified kaolinitic clays have semi-reinforcement properties in natural rubber. The amount of kaolinite is favourable to reinforcement, the amounts of quartz and mica is prejudicial. Properties connected with crystallinity and consequently with fineness are the second reason why vulcanized products vary : these are…
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 F. Bauer; Behavior of ferroelectric ceramics and PVF2 polymers under shock loading. AIP Conf. Pro…
A brief historical view of the origin, development, and application of the light comparison microscope is given. Problems emanating from restricted depth of focus in light-microscopical techniques are eliminated by utilizing the scanning electron microscope. Various attempts have been made to use the scanning electron…
One-electron reduction of the title complex leads o an extremely stable ring-reduced radical which has been isolated and characterized; addition of a second electron leads to, among other products, the free base tetraphenylporphine via an internal electron transfer.
The crystal structure of a new sulfosalt, TlHgAs 3 S 6 , has been determined. The crystal is monoclinic with space group P 2 1 / n . Four formula units are contained in a unit cell of dimensions a 0 = 5.948(2) Å, b 0 = 11.404(6) Å, c 0 = 15.979(5) Å, β = 90.15(1)°. The structure was determined by direct methods and re…
Abstract Experience with polytype families of layered structures and the theory of OD structures consisting of layers made it possible to elaborate generally applicable principles for a full description of polytypes by symbols. According to these principles, the exact stacking sequence of building layers (BLs) in any…