固体,融体およびガラス状態の物性とク-ロン力

概要

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ln order to show the limit of the congruently melting compound formation in binary solid state and to estimate the ionicity of random state systems, introduction of a parameter is proposed in this paper. The parameter is defined by P = n1P1/(n1P1 + n2P2) where P1 and mi are the polarization power of catio (P1>P2) and the mole fraction of the i-th salt respectively. When the congruently melting compound is formed in the binary solid system of alkali chlorides the values of P are found to fall into the range 0.5-0.95. Further, a linear relation is found between the equivalent conductivity of the fused ThCl4-KCl and PbCl2-KCl systems and the parameter P. The same relation is also found between a square of wave number of Raman spectra and the parameter P in glassy SiO2-PbO and GeO2-PbO systems. Ionic character of random state system can hold in linear part region. A discontinuous change in the slope is observed at the point where the congruently melting compound is formed. A relative force constant F by Raman spectra measurement can be related to coulombic force of the non bonded halogen atoms in tetrahedron type metal halogenides.
長崎大学教育学部の論文