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引言 矿物的标准生成自由能(△G_f~0)是通过以下三个途径获得的:①由矿物反应进行理论计算;②由量热数据或③由水溶液溶解度数据计算。然而。在大多数情况下,△G_f~0是基于矿物的理想结构式而不是基于由特定的矿物样品的化学分析得到的实际矿物分子式来计算的。因为结晶构造中的离子取代在矿物中是普遍存在的,所以矿物的成份一般与理想的不一致。因此依据理想分子式计算的自由能会有误差,当用于制作矿物的稳定图时将产生误解。本文的目的是:(1)由
INTRODUCTION The standard free energy of formation of minerals (ΔG_f ~ 0) is obtained by the following three ways: ①theoretical calculation by mineral reaction; ②calculation by calorimetric data or ③water solubility data. however. In most cases ΔG_f ~ 0 is based on the ideal structure of the mineral rather than on the actual mineral formula obtained from the chemical analysis of the particular mineral sample. Because ionic substitution in crystalline structures is ubiquitous in minerals, the composition of the minerals is generally not in accordance with the ideal. Therefore, the free energy calculated according to the ideal formula will be inaccurate and misunderstood when used to make the stable map of minerals. The purpose of this article is: (1) By