76. Bromo- and iodo-molybdenum(II) compounds
The first page of this article is displayed as the abstract.
Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Homogeneous and Inhomogeneous Mechanisms in the Dehydroxylation of Minerals
In attempts to postulate dehydroxylation mechanisms for the clay minerals, three assumptions have generally been made: that the elements of water are lost more or less uniformly from all over the crystal, that the tetrahedral parts of the structure are less likely to be disturbed than are the octahedral parts, and tha…
Anodic behaviour of the borohydride ion
J. P. Elder and A. Hickling, Trans. Faraday Soc., 1962, 58, 1852 DOI: 10.1039/TF9625801852
Calcium Carbonate Crystal Forms Formed from Sea Water by Inorganic Processes
This study was made to solve the following questions: (1) Which of the three crystal forms of calcium carbonate (calcite, aragonite and vaterite) is produced most predominantly from sea water by inorganic processes. (2) Which of the chemical constituents of sea water has the greatest influence on the polymorphic forma…
The crystal structure of calcium hydride
Neutron-diffraction patterns of CaH/sub 2/ and CaD/sub 2/ were measured to obtain more information on the positions of the hydrogen atoms. The results are in disagreement with those of Zintl and Harder, and calculations on the basis og a CaH/sub 2/ model were found to agree with the experimental data while those of Zi…
Pressure-Temperature-Composition Relationships of the Yttrium-Hydrogen System
Pressure‐temperature‐composition studies of the yttrium‐hydrogen system were made in the temperature range 900°–1350°C and the pressure range 1–760 mm Hg. The existence of a yttrium‐solid‐solution phase and a yttrium‐hydride phase, which approaches in composition, was established. These phases occur over a range of co…
Analysis of the stress-strain relationships in reactor grade graphite
Departure from linearity in the stress-strain relationships and plastic deformation are observed in reactor grade graphite at very small stresses. A model is put forward which describes the mechanical behaviour of such a material and a simple mathematical theory is derived which is shown to give an adequate descriptio…
Quantitative Analysis by X-ray Diffraction
Certain minerals in soil clays may be directly estimated from diffraction line intensity and the mass absorption coefficient of the sample to the radiation used. The main advantages of the method described are that no internal standards or calibration charts are required, and any dif-fraction line of the component to…
The Existence and Formation of the Solid B[sub 6]O
The suboxide of boron, B 6 O , has been prepared as a pure crystalline powder and in dense solid masses. The existence of B 6 O was substantiated from crystallographic, chemical, and density data. Information on x‐ray diffraction, chemical formation, oxidation resistance, and stability is also described. B 6 O was fou…
Generators for Simple Groups
The list of known finite simple groups other than the cyclic, alternating, and Mathieu groups consists of the classical groups which are (projective) unimodular, orthogonal, symplectic, and unitary groups, the exceptional groups which are the direct analogues of the exceptional Lie groups, and certain twisted types wh…
Sodium Borohydride, An Interesting Anodic Fuel (1)
Abstract not Available.
Electrical Properties of Pyrolytic Graphites
Pyrolized graphite samples are produced by pyroly tic deposition on substrates at temperatures of 1700 to 2500 deg C. A review is presented of the basal plane and c-direcion conductivities, electrical anisotropy, Hall coefficient, and magnetoresistance of these samples, as functions of the deposition temperature and t…
Cyanide complexes of the transition metals
W. P. Griffith, Q. Rev. Chem. Soc., 1962, 16, 188 DOI: 10.1039/QR9621600188
The Electrochemistry of Semiconductors
Abstract not Available.
Thermal decomposition of magnesium hydroxide
The first page of this article is displayed as the abstract.
Crystal Chemistry of Pyrochlore
Analyses of natural minerals suggest the wide variety of both cationic and anionic substitutions possible in the pyrochlore structure. Limits on the possibilities of ionic substitution in pyrochlore have been determined by the preparation of a large number of compounds. An important feature found is that substitution…
Precipitation of polyelectrolytes by salts
Abstract Precipitation of poly(acrylic acid) by added salts has been investigated under various conditions. The PAA was neutralized to various degrees of ionization α by tetra‐ n ‐butyl ammonium hydroxide. The minimum salt concentration C̄ s at which precipitation occurs was determined at various polymer concentration…
Direct structural evidence for weak charge-transfer bonds in solids containing chemically saturated molecules
The first page of this article is displayed as the abstract.
FOUNDATIONS OF ELASTIC SHELL THEORY
C O : P R LI IN RIE AN THE GEOMETRY OF A SURFACE Relationships between space and surface tensors and their derivatives in normal coor inates Deformation and strain Stress and couple result ts; equations of equilibrium The constitutive equations of the linear theory Remarks on the general theorems of the linear heoryAD…
Bremsstrahlung During the Collision of Low-Energy Electrons with Neutral Atoms and Molecules
Abstract : This Memorandum discusses the bremsstrahlung radiation emitted during the collision of low-energy electrons with neutral atoms and molecules. The discussion is limited to the case of low-energies E or = 1 ev, and soft photons, h omega E, where E is the electron kinetic energy, and omega is the radiation fre…