By D. Panke, E. Wölfel (auth.), Academician N. N. Sirota (eds.)

ISBN-10: 1468416863

ISBN-13: 9781468416862

ISBN-10: 146841688X

ISBN-13: 9781468416886

The current 4 volumes, released below the collective identify of "Chemical Bonds in Solids," are the interpretation of the 2 Russian books "Chemical Bonds in Crystals" and "Chemical Bonds in Semiconductors." those comprise the papers provided on the convention on Chemical Bonds held in Minsk among could 28 and June three, 1967, including a couple of different papers (denoted by way of an asterisk) that have been especially included. past collections (also released through the Nauka i Tekhnika Press of the Belorussian Academy of Sciences) have been entitled "Chemical Bonds in Semiconductors and Solids" (1965) and "Chemical Bonds in Semiconductors and Thermody­ namics" (1966) and come in English versions from experts Bureau, manhattan (pub­ lished in 1967 and 1968, respectively). the topic of chemical bonds in crystals, together with semiconductors, has lately develop into hugely topical and has attracted the curiosity of a large circle of physicists, chemists, and engineers. till lately, the main profitable description of the homes of solids (including semi­ conductors) has been supplied via the band thought, which nonetheless dominates the physics of solids. however, it truly is transparent that the main common process is that in line with the overall concept of chemical bonds in crystals, within which info of the electron distributions among atoms and of the wave capabilities look particularly expliCitly.

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Additional resources for Chemical Bonds in Solids: Volume 3: X-Ray and Thermodynamic Investigations

Example text

For the weakly bonded carbides. Group VI and higher. the C K bands are broad and have a shape close to that of the C K band from graphite. The C K bands from MC x carbides show an increase in asymmetry with decreasing values of x. Introduction Although the electronic properties and structure of transition metal carbides have been investigated extensively by other techniques such as magnetic susceptibility, resistivity, thermoelectric power, Hall effect, and x-ray diffraction. soft x-ray spectroscopy affords another important experimental method for studying bonding and electron distribution in these carbides.

M. Karal'nik, Izv. Akad. , 20:818 (1956). A. T. Shuvaev, Dissertation for Candidate's Degree [in Russian], Rostov-on-Don (1964). Ya. A. Ugai and E. P. Domashevskaya, Dokl. Akad. Nauk SSSR, 156:430 (1964). C. Froese, Proc. Cambridge Phil. , 53 :206 (1957). E. Clementi, A. D. McLean, D. L. Raimondi, and M. Yoshimine, Phys. , 133:A1274 (1964). D. A. Kleinman and W. G. Spitzer, Phys. , 118:110 (1960). B. Szigeti, Trans. , 45:155 (1949). B. SZigeti, Proc. Roy. , London, A204:51 (1950). K. B. Tolpygo, in: Chemical Bonds in Semiconductors and Solids, Consultants Bureau, New York (1967), pp.

No difference was observed in the emission bands from the two targets. The determination of x in the MC x carbides by sample measurements from one position of the target was not adequate. This is because in MCx carbides the value of x varied throughout the target. For example, the intensity of the C K band from a single crystal of NbCx (1/4 in. dia by 1/2 in. 85 at the other. The x values were determined by lattice parameter measurements. Pure stoichiometric carbides could not be obtained for groups IV and V transition metal carbides and the highest amount of carbon present in these carbides corresponds to approximately MC O• 95 which is referred to as stoichiometry in the text.

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Chemical Bonds in Solids: Volume 3: X-Ray and Thermodynamic Investigations by D. Panke, E. Wölfel (auth.), Academician N. N. Sirota (eds.)

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