Two-Sublattice Model of Ferroelectric Phase Transitions
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X-Ray Studies of Polyethylene under High Pressure
The phase diagram, growth processes of extended-chain crystal and high pressure phase, and the temperature dependency of lattice parameter in polyethylene have been studied under high pressure up to 6000 kg/cm 2 using a new high pressure X-ray diffraction apparatus. The high pressure phase diagram obtained by micro-DT…
Crystal structure of zirconium monochloride. A novel phase containing metal-metal bonded sheets
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure of zirconium monochloride. A novel phase containing metal-metal bonded sheetsDouglas G. Adolphson and John D. CorbettCite this: Inorg. Chem. 1976, 15, 8, 1820–1823Publication Date (Print):August 1, 1976Publication History Published online1 May 2002Published…
High-performance transistors with arsenic-implanted polysil emitters
Integrated high-frequency transistors (f/SUB T/>3 GHz) with an arsenic implanted polysil emitter have been investigated. The results are compared with data of bipolar transistors made with the conventional planar technique. It is shown that better emitter efficiency higher current carrying capability, and improved emi…
Some Studies on Tuft Weight Distribution in the Opening Room
A complete individualization of cotton tufts produced in an opening room is not easy, and hence the tuft weight distribution can be largely influenced by the technique used for tuft separation. Various research workers have arrived at different types of tuft weight frequency distribution. The present study describes a…
Crystal Field Induced Spin Rotation Observed by Magnetization Study of Polycrystalline NdCo2
Abstract Magnetization measurements of polycrystalline NdCo 2 are reported as a function of temperature (4.2 to 200 K) and magnetic field (0.2 to 26 koe). Anomalies in the temperature dependence of the magnetization are attributed to a [110] to [100] spin rotation around 40 K. Single‐ion crystal field calculations whi…
An Anomalous Behavior of the Longitudinal Magnetoresistance in Semimetals
An anomalous longitudinal magnetoresistance which decreases with increasing magnetic field in an appropriate specimen geometry has been investigated for semimetals. An intuitive explanation of this phenomenon is given in terms of geometry of inhomogeneous currents under the influence of a magnetic field. Experimental…
The ligand hyperfine interaction with rare earth ions. II. Calculation of the paramagnetic NMR shift
The isotropic and anisotropic 19F NMR shifts for Yb3+ doped into alkaline earth fluorides is calculated using a covalent model for the spin transfer. The good agreement between theory and experiment is strong evidence for the covalent model being the correct model in the case of Yb3+. The calculations reveal that the…
Electrochemical Behavior of Sulfur and Sulfide in Molten Sodium Tetrachloroaluminate Saturated with NaCl
The electrochemical behavior of sulfur and sulfide in molten NaAlCl 4 saturated with NaCl has been investigated at different temperatures and with different electrode materials. In melts containing sulfur one reduction and one oxidation wave are seen at tungsten and glassy carbon electrodes. At platinum two reduction…
Photolysis of Desmosine and Isodesmosine by Ultraviolet Light
1. Desmosine and isodesmosine were separated by ion-exchange and paper chromatography, after acid hydrolysis of purified elastin from beef ligamentum nuchae. The fractions obtained by ion-exchange chromatography were clearly mixtures of related compounds. The desmosine fraction could be resolved into seven compounds a…
Constantes cristallographiques de CuSe2O5, CuSeO3et Cu2SeO4
Crystal data of three compounds in the system SeO2–CuO have been determined from X-ray single-crystal and powder studies. CuSe2O5 is monoclinic, space group Cc or C2/c, with a = 12.254 (5), b = 4.858 (3), c = 7.960 (3) Å, β = 110.7 (1)°, Z = 4. CuSeO3 is monoclinic, space group P21/c, with a = 7.718 (2), b = 8.266 (3)…
Transition metal ions in high formal oxidation states. Structural characterization of the nickel and copper complexes of the 1,1-dicarboethoxy-2,2-ethylenedithiolate ligand
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransition metal ions in high formal oxidation states. Structural characterization of the nickel and copper complexes of the 1,1-dicarboethoxy-2,2-ethylenedithiolate ligandD. Coucouvanis, F. J. Hollander, and M. L. CafferyCite this: Inorg. Chem. 1976, 15, 8, 1853–1860Publica…
The effect of alloying on 485°C embrittlement
An examination has been made of the effects of carbon, nitrogen, molybdenum, titanium, and niobium on the occurrence of 485°C embrittlement in 25%Cr ferritic stainless steels. All these alloying additions increase the rate of precipitation, as measured by the rate of age hardening. In general the tensile strength and…
Temperature Dependence of the Heat Capacity in BaTiO3
Heat capacity of BaTiO 3 has been measured in the vicinity of the ferroelectric-to-paraelectric transition temperature by using both the crystal grown by the top-seeded solution technique and that grown by the flux method. It is found that the temperature dependence of the heat capacity over a rather wide temperature…
Reconstitution of collagen‐fold structure with stretching of gelatin film
Abstract The gelatin film is stretched more 100% over 75% relative humidity, while the dried gelatin extended only several percent. In this experiment the gelatin film was stretched in a solution of water and ethanol. The sample was extended to 650% of its initial length when ethanol/water was 1.5(w/w) at 30°C. The wi…
Corrosion Inhibition of Copper by Tolyltriazole
A review is given of the use of tolyltriazole (also called tolutriazole, but more strictly 4-, 5-, or 6-methyl-1 H-benzotriazole) as an inhibitor for copper and brass in a variety of corrosive environments. The effect of a pretreatment with an aqueous solution of tolyltriazole was not as effective as one with benzotri…
The Effects of Soft Modes on the Structure and Properties of Materials
Gallium is a metal that literally melts in your hand. It has low toxicity, near-zero vapor pressure, and a viscosity similar to water. Despite possessing a surface tension larger than any other liquid (near room temperature), gallium can form nonspherical ...Read More
Optical and Electrical Spectroscopy of Zinc Oxide Crystals Simultaneously Doped with Copper and Donors
Abstract In Cu‐doped ZnO crystals the Fermi level is varied by additional donor doping (In or H) in the energy range 0 to 250 meV below the bottom of the conduction band. The results of optical absorption and electrical conductivity measurements carried out in these crystals can be explained by using the model in whic…
Zur Strukturchemie der Alkalisalze der Tetrathiosäuren der Elemente der 5. Hauptgruppe
Abstract Die wasserfreien Tetrathioantimonate von K + , NH 4 + und Na + kristallisieren kubisch im (NH 4 ) 3 SbS 4 ‐Typ, während bei den bisher bekannten Alkalitetrathioarsenaten und ‐phosphaten der (NH 4 ) 3 AsS 4 ‐Typ beobachtet wird. Die Ausbildung der beiden unterschiedlichen Strukturtypen wird auf Packungseffekte…
Shell Growth in the Marine Environment: Approaches to the Problem of Marginal Calcification
Although marine waters are usually found to be supersaturated with respect to both calcite and aragonite, natural precipitation of these carbonate minerals is very restricted. This is apparently due to the occupancy and effective removal of lattice sites by random organic molecules present in natural seawater. Despite…