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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Grüneisen parameter ： ウィキペディア英語版 Grüneisen parameter The Grüneisen parameter, γ, named after Eduard Grüneisen, describes the effect that changing the volume of a crystal lattice has on its vibrational properties, and, as a consequence, the effect that changing temperature has on the size or dynamics of the lattice. The term is usually reserved to describe the single thermodynamic property γ, which is a weighted average of the many separate parameters γi entering the original Grüneisen's formulation in terms of the phonon nonlinearities. == Thermodynamic definitions == Because of the equivalences between many properties and derivatives within thermodynamics (e.g. see Maxwell Relations), there are many formulations of the Grüneisen parameter which are equally valid, leading to numerous distinct yet correct interpretations of its meaning. Some formulations for the Grüneisen parameter include: $\backslash gamma\; =\; V\; \backslash left(\backslash frac\backslash right)\_V\; =\; \backslash frac\; =\; \backslash frac\; =\; \backslash frac$ where V is volume, $C\_P$ and $C\_V$ are the principal (i.e. per-mass) heat capacities at constant pressure and volume, E is energy, α is the volume thermal expansion coefficient, $K\_S$ and $K\_T$ are the adiabatic and isothermal bulk moduli, $v\_s$ is the speed of sound in the medium, and ρ is density. The Grüneisen parameter is dimensionless. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Grüneisen parameter」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.