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Unusually clear, accessible introduction to contemporary theories of solid-state physics. Nonmathematical treatment of heat, atomic motion, electrons in solids, many other topics. "Excellent." — Choice. 1965 edition.
It is now ten years since it was first convincingly shown that below 1 K the ther mal conductivity and the heat capacity of amorphous solids behave in a way which is strikingly different to that of crystalline solids. Since that time there has been a wide variety of experimental and theoretical studies which have not only defined and clarified the low temperature problem more closely, but have also linked these differences between amorphous and crystalline solids to those suggested by older acoustic and thermal experiments (extending up to 100 K). The interest in this somewhat restricted branch of physics lies to a considerable extent in the fact that the differences were so unexpected. It might be thought that as the tempera ture, probing frequency, or more generally the energy decreases, a continuum de scription in which structural differences between glass and crystal are concealed should become more accurate. In a sense this is true, but it appears that there exists in an amorphous solid a large density of additional excitations which have no counterpart in normal crystals. This book presents a survey of the wide range of experimental investigations of these low energy excitations, together with a re view of the various theoretical models put forward to explain their existence and nature.
Understandable by anyone concerned with crystals or solid state properties dependent on structure Presents a general system using simple notation to reveal similarities and differences among crystal structures More than 300 selected and prepared figures illustrate structures found in thousands of compounds
This text offers basic understanding of the electronic structure of covalent and ionic solids, simple metals, transition metals and their compounds; also explains how to calculate dielectric, conducting, bonding properties.
Worldwide research on ancient glass began in the early 20th century. A consensus has been reached in the community of Archaeology that the first manmade or synthetic glasses, based on archaeological findings, originated in the Middle East during the 5000-3000's BC. By contrast, the manufacturing technology of pottery and ceramics were well developed in ancient China. The earliest pottery and ceramics dates back to the Shang Dynasty - the Zhou Dynasty (1700 BC-770 BC), while the earliest ancient glass artifacts unearthed in China dates back to the Western Han Dynasty. Utilizing the state-of-the art analytical and spectroscopic methods, the recent findings demonstrate that China had already developed its own glassmaking technology at latest since 200 BC. There are two schools of viewpoint on the origin of ancient Chinese glass. The more common one believes that ancient Chinese glass originated from the import of glassmaking technology from the West as a result of Sino-West trade exchanges in the Western Han Dynasty (206 BC-25 AD). The other scientifically demonstrates that homemade ancient Chinese glass with unique domestic formula containing both PbO and BaO were made as early as in the Pre-Qin Period or even the Warring States Period (770 BC-221 BC), known as Yousha or Faience.This English version of the previously published Chinese book entitled Development History of Ancient Chinese Glass Technology is for universities and research institutes where various research and educational activities of ancient glass and history are conducted. With 18 chapters, the scope of this book covers very detailed information on scientifically based findings of ancient Chinese glass development and imports and influence of foreign glass products as well as influence of the foreign glass manufacturing processes through the trade exchanges along the Silk Road(s).
Although much work has been performed on measure ments and interpretation of light absorption by opaque or nearly opaque solids, it is surprising to note that until recently relatively little reliable experimental data, and much less theoretical work was available on the nature of transparent solids. This, in spite of the fact that a vast majority of engineering and device ap plications of a solid depend on its optical transparency. Needless to say, all solids are both transparent and opa que depending on the spectral region of consideration. The absorption processes that limit the transparency of a solid are either due to lattice vibrations, as in ionic or partially ionic solids, or due to electronic transi tions, both intrinsic and impurity-induced. For most materials, a sufficiently wide spectral window exists be tween these two limits, where the material is transpar ent. In general, the absorption coefficient, in the long wavelength side of, but sufficiently away from, the fun damental absorption edge, is relatively structureless and has an exponential dependence on frequency. Recent evi dence suggests that in the short wavelength side of the one-phonon region, but beyond two- or three-phonon sin gularities, the absorption coefficient of both polar and nonpolar solids is also relatively structureless and de pends exponentially on frequency.
Considering the high level of our knowledge concerning covalent bond formation in the organic chemistry of molecules, our understanding of the principles involved in organic solid design is almost in its infancy. While chemists today are able to synthesize organic molecules of very high complexity using sophisticated methods of preparation, they lack general approaches enabling them to reliably predict organic crystalline or solid structures from molecular descriptors - no matter how simple they are. On the other hand, nearly all the organic matter surrounding us is not in the single-molecule state but aggregated and condensed to form liquid or solid molecular assemblages and structural arrays giving rise to the appearances and properties of organic compounds we usually observe. Obviously, the electrical, optical or magnetic properties of solid organic materials that are important requirements for future technologies and high-tech applications, as well as the stability and solubility behavior of a medicament depend on the structure of the molecule and the intramolecular forces, but even more decisively on the intermolecular forces, i. e. the packing structure of the molecules to which a general approach is lacking. This situation concerned ]. Maddox some years ago to such a degree that he described it as "one of the continuing scandals in the physical sciences" [see (1998) Nature 335:201; see also Ball, P. (1996) Nature 381:648]. The problem of predicting organic solid and crystal structures is very dif- cult.