Materials Literature
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The AlKα emission wave length is determined by the state of coordination of Al atoms and a clear distinction can be made between Al atoms in fourfold and in sixfold coordination to oxygen and also between Al atoms in fourfold coordination to oxygen and to nitrogen. Measurements of Δ(2θ) (the difference in diffraction…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCOLLOIDAL ALUMINA—THE CHEMISTRY AND MORPHOLOGY OF COLLOIDAL BOEHMITEJohn BugoshCite this: J. Phys. Chem. 1961, 65, 10, 1789–1793Publication Date (Print):October 1, 1961Publication History Published online1 May 2002Published inissue 1 October 1961https://pubs.acs.org/doi/10.1…
The absorptions of natural MgAl 2 O 4 spinels which have been heated to various temperatures suggest that a structural change takes place between 800° and 900°. A decrease in the lattice constant of 0.004 Å occurs at the same temperature. Comparisons between the absorptions of LiAl 5 O 8 with ordered and disordered Li…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic Studies of High-spin Cobaltous Compounds. VII. Some Thiocyanate ComplexesF. A. Cotton, D. M. L. Goodgame, M. Goodgame, and A. SaccoCite this: J. Am. Chem. Soc. 1961, 83, 20, 4157–4161Publication Date (Print):October 1, 1961Publication History Published online1 May 2…
Experiments have been carried out on the photolysis of methyl azide and methyl-d3 azide at high dilution in solid argon (4.2°K) and carbon dioxide (∼50°K). Photolysis of these species in argon and carbon dioxide matrices results in the appearance of a number of new spectral features in the 3300–600 cm—1 region. The sp…
The structure of 4-nitroaniline has been refined three-dimensionally with visually-estimated Cu Ka data. Positional and thermal parameters for the carbon, nitrogen, and oxygen atoms, and positional parameters for the hydrogen atoms, were obtained by least squares. The standard errors in bond lengths not involving hydr…
It was found that there exists a new ferromagnetic phase in Cu poor Mn–Al–Cu alloy in the composition range of 25 to 45 at % Mn, 37.5 to 50 at % Al and 12.5 to 25 at % Cu. The crystal structure is CsCl type and the lattice parameter is 2.984Å. This structure is the same as the κ phase in Mn–Al–Fe system. The magnetic…
Examines the crystalline structure of the diamond and the chemical and industrial processes involved in its synthesis.
Abstract Some silica modification such as carplex and ground quartz particle, gives rise to the bands near 950 cm−1. This band has no relation with the skeletal structure of Si–O bond and can not be explained as overtone or combination tone. It is reasonable to assign this band to O–H deformation vibration of silanol…
The electrical conductivity σ of single crystals of cuprous oxide was measured from 25° to 1100°C and at oxygen pressures PO2 from 10—5 to 760 mm. Except at very low PO2 the σ at all T is due entirely to positive holes associated with native defects (cation vacancies). The different activation energies which occur in…
Abstract Experimental details are given for the preparation of 1,1′‐ferrocenedicarboxylic acid and 1,1′‐ferrocenedicarbonyl chloride. Ferrocenedicarbonyl chloride was used to prepare novel condensation polymers containing the ferrocene nucleus as part of the main polymer chain. Interfacial polycondensation was used fo…
Theories of several elastic effects resulting from the contribution of electrons to the strain energy function of germanium are presented. They show that the elastic properties are appreciably changed by doping with donor and acceptor impurities. The properties considered are: (1) volume, (2) elastic constants of dege…
In addition to the well‐known zinc orthotitanate (Zn 2 TiO 4 ) and zinc metatitanate (ZnTiO 3 ), the study of solid‐state reactions in the system ZnO‐TiO 2 disclosed a previously unrecognized compound, Zn 2 Ti 3 O 8 . This compound was obtained when sulfate‐containing hydrous titanium oxide of anatase structure was re…
Infrared absorption measurements of a number of metal oxides with spinel structure have been carried out in the range of 10 to 30 μ . All spinels show mainly two chief groups of absorption ( A and B ). By preparing a number of mixed crystal series it was possible to determine the mutual relations of A and B and the de…
A review is made of the work on reduced and ``doped'' rutile performed since the appearance of Grant's survey article in the Reviews of Modern Physics (1958). Measurements of electrical and optical properties, and of electron spin resonance spectra are discussed. A model of electronic bound states and conduction level…
ADVERTISEMENT RETURN TO ISSUEPREVArticleProgress in Semiconductors.FREDERICK SEITZCite this: J. Am. Chem. Soc. 1961, 83, 20, 4304Publication Date (Print):October 1, 1961Publication History Published online1 May 2002Published inissue 1 October 1961https://pubs.acs.org/doi/10.1021/ja01481a062https://doi.org/10.1021/ja01…
The experimental information relevant to the band structure of the compounds InSb, InAs, GaSb, GaAs, GaP, AlSb and some of their alloys is synthesized and interpreted in terms of a consistent theoretical picture which exploits the close relationship linking the band structures of the group 4 and 3–5 semiconductors. It…
This paper reviews the work which has been carried out in these Laboratories during the past two years on single crystals of bismuth telluride and its alloys. The combination of experiments on Faraday rotation with those performed previously on galvanomagnetic effects has established that there are 3- and 6-valley ban…
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1961.
The conditions necessary in metals for the presence or absence of localized moments on solute ions containing inner shell electrons are analyzed. A self-consistent Hartree-Fock treatment shows that there is a sharp transition between the magnetic state and the nonmagnetic state, depending on the density of states of f…