Materials Literature
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excellent description of the delicate tubular structure which invests each striated muscle fiber, and is especially replete with elaborate sketches of various muscle fibers from a comparative point of view. Subsequently many papers have been published using the light microscope in conjunction with various histological…
Single crystals of sodium nitrite were irradiated with Co60 gamma rays at 77°K and studied by the paramagnetic resonance method. An anisotropic three-line hyperfine spectrum associated with a single paramagnetic species was observed. The hyperfine structure arises from a nitrogen nucleus in the paramagnetic species at…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPHASE EQUILIBRIA IN THE BINARY SYSTEMS PuCl3—RbCl AND PuCl3—CsCl1R. Benz and R. M. DouglassCite this: J. Phys. Chem. 1961, 65, 8, 1461–1463Publication Date (Print):August 1, 1961Publication History Published online1 May 2002Published inissue 1 August 1961https://pubs.acs.org…
Abstract Aus den IR‐ und R AMAN ‐Spektren von Na 2 S 2 O 7 und K 2 S 2 O 7 wird mit Hilfe der Auswahlregeln für das S 2 O 7 ″‐Ion eine Struktur der Punktgruppe C 2v abgeleitet. Die beobachteten Frequenzen lassen sich größtenteils den Normalschwingungen zuordnen. Aus den erhaltenen Kraftkonstanten errechnet sich nach d…
Self-diffusion coefficients of crystal-bar zirconium have been measured between 1500 °C and 1100 °C, using radioactive Zr 95 as a tracer. The results may be represented by[Formula: see text]The pre-exponential factor is about three orders of magnitude smaller than that measured in most close-packed systems and the act…
The diffusion of nickel into grain boundaries of various tilt angles in copper bicrystals was studied. The concentration contours from the grain boundary and the lateral lattice diffusion were measured by means of electron-probe microanalysis. The product of grain-boundary width and diffusion coefficient were calculat…
The theory of the propagation of sound in a homogeneous gas including the effect of heat conduction is presented for the purpose of clarifying the underlying thermodynamic process. The propagation of sound in a liquid with a homogeneous and isotropic distribution of gas bubbles is then considered. The bubbles are assu…
A Taylor series expansion of the intermediate coupling energy levels for Nd3+ and Er3+ was calculated. New energy levels can be calculated without rediagonalizing the matrix. A calculation for NdCl3 is discussed as an example.
Abstraft As a part of a detailed study of the structures and crystal chemistry of the aluminum silicate minerals the crystal structure of andalusite, Al 2 SiO 5 , has been refined. Twelve cycles of least-squares refinement on the IBM 704 computer reduced the disagreement factor, R , for 354 hkl reflections from an ini…
Im ersten Teil der vorliegenden Arbeit werden die theoretischen Grundlagen für die Bestimmung des Fernordnungsgrades nematischer kristallinflüssiger Schmelzen aus Messungen der diamagnetischen Suszeptibilitäten, der Brechungsindizes, des Dichroismus und der Protonenresonanzen behandelt. Im zweiten Teil werden diese Me…
The infra-red spectra of layer structures synthesized under controlled high-temperature, high-pressure conditions in sealed noble-metal systems have been examined in the region 400–5000 cm −1 (25–2 μ ). By complete replacement of an ion, e.g., Mg 2+ by Ni 2+ or Fe 2+ , Al 3+ by Ga 3+ or Fe 3+ , and Si 4+ by Ge 4+ it w…
The electron spin resonance of one of the defects produced by fast neutron irradiation of crystalline quartz is analyzed. The g tensor and hyperfine tensors deduced from these results imply that the defect electron is in a nonbonding tetrahedral hybrid orbital on a silicon. It is suggested that the instability of the…
Samples of Ca 2 SiO 4 were prepared by three different methods. These samples were examined by differential thermal analysis, high‐temperature X‐ray diffraction, and air quenching of pellets. It was found that the β modification, during cooling, converted completely and rapidly to the γ modification and “dusted” only…
Article A handbook of lattice spacings and structures of metals and alloys. was published on August 1, 1961 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 115, issue 3-4).
Ceramic dielectrics capable of field-enforced antiferroelectric-to-ferroelectric transitions from below -60°C to over 100°C have been made. The transition manifests itself by a D/E hysteresis figure with a linear central region and loops showing saturation on either end. Previously studied materials have exhibited thi…
This paper is concerned with the effects of orientation on the combinatorial term g for the number of ways to pack together Nx linear polymers (x mers). Accordingly g is evaluated as a function of the number of molecules in each permitted direction for the case of straight rigid rods. The permitted directions can be c…
The behavior of a stream of electrons penetrating a solid target is studied with a view to determining the proportion which return to the surface and pass back into space. Two existing theories (diffusion and large-angle single elastic scattering) are adapted to this end. These theories predominate for high and low at…
Diamond growth occurs at high temperatures and pressures in the presence of certain molten metals which serve as solvent catalysts. The zones of pressure and temperature in which diamond growth occurs have been determined for a number of metals. These zones are bounded on the low-temperature side by the melting point…
It is shown that the Debye-Scherrer method can be used successfully on an x-ray spectrogoniometer by removing the bisecting mechanism. Complete profiles of the diffraction lines have been recorded and the center of gravity (CG) determined with an accuracy of ±0.005°2θ. Monochromated CuKα1 radiation was employed and th…
A surface-active aqueous solution was foamed up a glass column, removed, collapsed, and returned as down-coming liquid to drain countercurrently against the rising foam. This deliberate refluxing action greatly increased the degree of separation of the surfactant over that obtainable without reflux. The effects of alt…