Materials Literature
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Neutron diffraction studies have been carried out on powder samples of NiZrH3 and NiZrD3. The x-ray space group and heavy atom positions are confirmed. Hydrogen atoms are located in 4 fold and 8 fold positions of the orthorhombic space group Cmcm. The 8 fold hydrogen atoms have three Zr and one Ni close neighbor while…
Lattice parameters of the high-pressure forms of the alkali halides were determined. The lattice parameters were used to compare the lattice energies of the NaCl and CsCl type structures at the transition pressure. An analysis of the effect of experimental uncertainties on the calculated lattice energies showed that i…
New x‐ray intensity data from synthetic beryllium oxide crystals have verified the distorted wurtzite‐type structure previously reported by Jeffrey, Parry, and Mozzi. The oxygen z parameter obtained from the refinement is compared to 0.375 for the undistorted structure. The resulting structure has a bond distance of p…
The liquidus, solidus, and subsolidus in the system MgO‐MgCrz04 were redetermined. Petro‐graphic studies indicated that 47 wt% Cr203 could enter into the periclase lattice at about 235OO C. X‐ray and optical data showed that the solid solution decreased to 32 wt% Cr202 at 2165OC, 11 wt% at 1600°C, 5 wt% at 1400°C, 2.5…
The volatile products of the reaction between a molecular beam of room-temperature chlorine and a polycrystalline nickel surface have been identified; their formation rates have been measured by a mass-spectrometric technique at surface temperatures between 1000° and 1600°K and beam fluxes equivalent to pressures of 1…
Abstract An einem SrTiO 3 ‐Einkristall wurde im Temperaturbereich von 15 bis 80 °K die Dielektrizitätskonstante in Abhängigkeit von einer überlagerten Gleichspannung untersucht. Dabei wurden Maxima der Dielektrizitätskonstanten festgestellt, wie sie auch bei normalen Ferroelektrika, die einen Phasenübergang zweiter Or…
J. Bregman, K. Osaki, G. M. J. Schmidt and F. I. Sonntag, J. Chem. Soc., 1964, 2021 DOI: 10.1039/JR9640002021
By examining passivated silicon integrated circuits in the scanning electron microscope, the surface contours of p‐n junctions have been mapped, potential drops across integrated resistors have been observed, and physical characteristics of the oxide surface, evaporated leads, and bonded gold wires have been determine…
Abstract Radiation annealing is considered for the particular case of spontaneous recombination of a vacancy and an interstitial which lie closer together than a certain critical distance. By employing a simplified statistical method, a generalized theoretical dose curve is obtained. The theoretical results are applie…
The influence of the particle factor and lattice factor on the positions of the small-angle reflections of polymer crystalline samples is investigated. Since a single-crystal cake or a polymer solid crystallized from melt supposedly consists of stacks of nearly parallel plate-like lamellae, one may describe the scatte…
Abstract Die Infrarotspektren von 25 Sulfaten und Phosphaten bekannter Kristallstruktur wurden aufgenommen. Die Auswahlregeln der site‐Symmetrie werden befolgt gefunden mit Ausnahme von K‐, Rb‐ und Cs‐Verbindungen und im Gegensatz zu vollständig hydratisierten Salzen. Zusätzliche Korrelationsfeldaufspaltung wird beoba…
Z. S. Basinski, Discuss. Faraday Soc., 1964, 38, 93 DOI: 10.1039/DF9643800093
A simple nondestructive method of measuring the refractive index and thickness of transparent films on reflective substrates has been developed. The technique involves the use of a microscope equipped with a monochromatic filter on the objective and a stage that can be rotated so that the reflected light is observed a…
T. A. Stephenson, E. Bannister and G. Wilkinson, J. Chem. Soc., 1964, 2538 DOI: 10.1039/JR9640002538
Electron microscopy has been employed to investigate the structures of various face-centered cubic solid solutions, particularly austenitic alloys, which are susceptible and nonsusceptible to transgranular stress corrosion cracking. It has been found that susceptibility is associated with those alloys in which disloca…
M. I. Al-Joboury and D. W. Turner, J. Chem. Soc., 1964, 4434 DOI: 10.1039/JR9640004434
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D. Cordischi, A. Mele and A. Somogyi, J. Chem. Soc., 1964, 5281 DOI: 10.1039/JR9640005281
E. V. Aroskar, M. T. Chaudhry, R. Stephens and J. C. Tatlow, J. Chem. Soc., 1964, 2975 DOI: 10.1039/JR9640002975
Following the previous reports on borate and silicate systems, we studied the glass-formation range of germanate systems. Germanate glass has a structure similar to that of silicate However, these systems have not been sufficiently studied and practically utilized, because germanium is a rare element. The molecular we…