New concepts in the physics of solids
Subtitle: a monograph
By: Johannes N. Plendl
Contributors: Air Force Cambridge Research Laboratories (U.S.)
Series: Special reports -- no. 52; Special reports (Air Force Cambridge Research Laboratories (U.S.)) -- no. 52
Publisher: United States Air Force, Office of Aerospace Research, Air Force Cambridge Research Laboratories, Solid State Sciences Laboratory
Published: 1966
Place of publication: L.G. Hanscom Field, Bedford, Mass
Language: eng
Number of pages: 77
Subjects: Solids; Infrared spectra; Specific heat; Compressibility; Lattice dynamics; Hardness
Description: This work treats spectral and atomistic concepts derived from an analytical study of more than one hundred solids. The study deals with such characteristics as infrared spectra, specific heat, bulk-modulus, change of compressibility with pressure, lattice anharmonicity, exponent of repulsion, lattice cohesive energy, zero-point energy, hardness, and valence. Characterizing the lattice vibrations - that is, the infrared spectrum through one single frequency (the 'centro-frequency', defined by the center of gravity of the entire spectrum) - it is shown that an identical frequency may be derived as a mechanical analogy from the average velocity of sound determined, in this case, from the cubic compressibility. A thermodynamical analogy exists in the Debye frequency from specific heat. The 'centro-frequency' has proven to be the key to a successful formulation of the nonlinearity or anharmonicity of the attractive and repulsive forces in solids. The importance of anharmonicity for the understanding of the basic properties of solids from an atomistic point of view is shown through various applications. (Author).
Notes: "AFCRL-66-541."

"August 1966."

Solid State Sciences Laboratory Projects 5621, 0000."

"This research was partially supported by the Air Force In-House Laboratory Independent Research Fund."

Bibliography: p. 75-77.