Modern Theory of Solids. I

Abstract

(Mit 6 Abbildungen) InhaltsiibersiehtEs sollen die Ergebnisse der vorangehenden Arbeit ") verwertet werden bei der Berechnung der Energiebander nach der Zellenmethode von Wigner und Seitzs)') bzw. Slater9)O) und nach dem Variationsverfahren. Im ersten Fall wird der .Kristall in E ementarzellen zerlegt, SO -A u +~V U =~E U .(1) 1) Dissertation, GieSen ; vorgetragen auf dem Deutschen Physikertag Berlin 1962.

Ionized states of molecular crystals

“…Seitz 1940) expected in molecular crystals are of two types, in which (i) the electron is free within the crystal, and (ii) the electron is bound to an individual molecule.…”

An Investigation of Finite Strain in an Isotropic Material Subjected to Hydrostatic Pressure and its Seismological Applications

“…The atomic theory of solids (Seitz 1940;Fiirth 1944) gives some important evidence on the compression of materials at high pressures. In its simplest form the theory will give only indicative results and cannot be considered as rigorous.…”

“…It has been shown (Seitz 1940) that for lithium fluoride n=6 so that 0=3, and further it has been determined that 0 increases with increasing atomic weight. It appears that the values obtained for the alkali metals in Tables 2, 3, and 4 are not inconsistent with these results.…”

Comments on ``Perturbation Theory of the Heats of Mixing of Fused Salts'' by Davis and Rice

“…For example, if one uses the silver ion radius of Pauling, then the molar volumes of molten AgN0 3 , AgCl, and AgBr 8 are all smaller than the close packed volume of the ions involved. Although there is a range of ambiguity for the radius of Ag+, it is clear that the Pauling radius is (unambiguously) impossible in the cases cited, whereas the value of 0.95 A is in reasonable accord with the steric requirements of solid 9 and molten 8 silver salts and with the relative molar volumes of sodium and silver salts.…”