402. The reactions of carbon monoxide and nitric oxide with tertiary phosphine complexes of iron(II), cobalt(II), and nickel(II)
G. Booth and J. Chatt, J. Chem. Soc., 1962, 2099 DOI: 10.1039/JR9620002099
Materials Literature
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Minimum Detectable Power of a Pyroelectric Thermal Receiver
For a ferroelectric crystal, the rate of change of polarization with temperature is large, especially close to the Curie point where a phase transition occurs. Thus, a change of polarization due to an incident radiation flux gives rise to a large pyroelectric voltage output. The ``minimum detectable power'' Wm is calc…
Theory of the Optical Properties of Quartz in the Infrared
A theoretical study has been carried out of the eight non-degenerate optical vibrations of $\ensuremath{\alpha}$ quartz including the problem of their infrared and Raman intensities. The investigation consists of three parts: First, the atomic motions and frequencies are calculated on the basis of a valence force mode…
The Bonds between Thiolignin and Synthetic Rubber
クラフトパルプエ業廃液よりpHによってチオリグニンの分別沈殿を試みた。沈殿剤としては, pH9以上の領域ではNaHCO3飽和溶液を使用し, それからpH7まではCO2を, 酸性領域では, 塩酸を使用して, 合計10フラクションに分別した。次に各フラクションのリグニン中の二三の官能基の量を比較したところ, 沈殿pHが低下するにつれて,(1) フェノール性水酸基およびカルボキシル基は, 漸次増大するが, 後都の増加率は, 前者に比して著しく大きい。(2) カルボニル基は, 漸次減少するが, 特に酸性フラクションでの低下は著しい。(3) グアヤシル基は, 第1フラクション (最高pHフラクション) のみ若干低いが, 他のフラクションでは…
Some characteristics of the hydration of 3CaO.Al2O3 in the presence of CaSO4.2 H2O
Abstract Experiments on the hydration of 3CaO.Al 2 O 3 in a solution of Ca(OH) 2 in the presence of CaSO 4 .2H 2 O are described. An approximate theoretical treatment of the retarded stage of this reaction is offered on the basis of water transport through a calcium hydrosulphatoaluminate (ettringite) layer on the 3Ca…
The Mechanism of the Niobium Reaction with Water Vapor and with Oxygen
The low‐temperature oxidation of niobium in water vapor and in oxygen occurs by diffusion of oxygen into the metal and formation of and on the surface. forms a porous scale on , growing linearly from the oxide‐oxide interface. Solution of oxygen in the metal and the growth of on niobium are believed to be diffusion co…
Recent Progress of Crystal Field Theory
A brief account is given concerning the theoretical framework of the molecular orbital treatment of crystal field theory. Indirect and direct experimental evidences of electron delocalization are summarized. A historical survey is given of the theoretical treatment of cubic crystal field splitting. Finally, a molecula…
Über WO3‐Umwandlungen bei der thermischen Zersetzung der Ammoniumparawolframate
Abstract An Hand von röntgenographischen Untersuchungen, insbesondere mit der UNICAM‐Hochtemperaturkamera sowie mit Hilfe differentialthermoanalytischer Untersuchungen und Kapazitätsmessungen konnte nachgewiesen werden, daß die thermische Zersetzung aller Ammoniumparawolframate zum WO 3 zunächst über einen röntgenamor…
The heat of formation and entropy of BOF
The first page of this article is displayed as the abstract.
The Effects of Oxide Additions upon the Structure Sensitive Properties of Lead Silicate Melts
In a previous paper, studies of the various physical properties of molten lead silicates were reported. Observation of the effects of the structure sensitive properties of lead silicate melts resulting from addition of various metallic oxides as a third element should be of great importance in order to understand the…
Thermal oxidation of polyethylene
N. T. Notley, Trans. Faraday Soc., 1962, 58, 66 DOI: 10.1039/TF9625800066
Copper Corrosion
Experimental methods are described for studying rates of formation of soluble and insoluble corrosion products of copper exposed to water containing dissolved oxygen and carbon dioxide. Coulometric reduction indicates that the films formed on copper under these conditions are predominantly of cuprous oxide. Generation…
Copper Corrosion
The oxidative dissolution of copper in acidic, aqueous media is limited in rate by the presence at the metal‐solution interface of a growing film of cuprous oxide. A brief survey of what is known about the nature and modes of growth of such films provides the basis for a "duplex film" model of the corroding copper sys…
Multiple Rate Transitions in the Aqueous Corrosion of Zircaloy
The weight gain of Zircaloy‐2, ‐3, and low nickel Zircaloy‐2 during water and steam corrosion is shown to go through two or more repetitive cycles. The evidence indicates these weight gain curves truly represnt the corrosion kinetics. Several corrosion mechanisms are considered in the light of these kinetics. While no…
Transition metal alloys
A particular interest in the properties of transition metal alloys at the present time is the problem of the occurrence of localised electron spins. There is also, particularly in the first period, the problem of ordered magnetic states. Recent work has established that suppression of localised spin may occur in mater…
The crystal structures of Pd4Se and Pd4S
The compounds Pd4Se and PdaS are isostruetural, space group P421c(D~d ), with eight palladimn atoms in general positions and two selenium (sulfur) atoms in positions 0, 0, 0; , , . For Pd4Se the palladium coordinates were determined to be x =0.374, y =0.232, z =0.154, and for Pd4S to be x =0.358, y =0.230, z =0.155. I…
Lattice constants and thermal expansion of silicon up to 900 °C by X‐ray method
Abstract A detailed study of the thermal expansion of silicon is made using an X‐ray powder technique, between room temperature and 900 °C. The values only agree with those of MAISSEL below 700 °C, the present values being higher above this temperature. It is found that Grüneisen's two‐constant formula cannot fit the…
Heats of polymeric reactions. II. Thermochemical data on more vinyl monomers
Abstract Heats of polymerization of twelve vinyl monomers have been determined on an isothermal distillation calorimeter working at 74.5°C. Polar monomers were found to have their molar heats of polymerization appreciably dependent on the extent of association of the monomeric state in the medium of polymerization and…
Devolatilization of Viscous Polymer Systems
The removal of residual volatile components from polymers is an operation of some importance in the plastics industry. A generalized, although somewhat idealized, model for continuous, wiped-film devolatilization of viscous polymer melts is presented which relates devolatilization capability to important geometry, ope…
Magnetic Susceptibility of Potassium Hexachlororhenate (IV) and Potassium Hexabromorhenate (IV) from 5° to 300°K
The Curie points of K2ReCl6 and K2ReBr6 obtained from magnetic susceptibility measurements are 12.4±0.5° and 15.3±0.5°K, respectively, which confirm that cooperative-type transitions observed in the heat capacities of these compounds with maxima at 11.9±0.1° and 15.2±0.1°K, respectively, represent transitions to the a…