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论文题目: Modeling H, Na, and K diffusion in plagioclase feldspar by relating point defect parameters to bulk properties
全部作者: Zhang, Baohua; Shan, Shuangming; Wu, Xiaoping
第一作者: Zhang, Baohua
联系作者: Zhang, Baohua
刊物名称: PHYSICS AND CHEMISTRY OF MINERALS
发表年度: 2016
卷:
期: 43 (2)
页码: 151-159
摘要: Hydrogen and alkali ion diffusion in plagioclase feldspars is important to study the evolution of the crust and the kinetics of exsolution and ion-exchange reactions in feldspars. Using the available PVT equation of state of feldspars, we show that the diffusivities of H and alkali in plagioclase feldspars as a function of temperature can be successfully reproduced in terms of the bulk elastic and expansivity data through a thermodynamic model that interconnects point defect parameters with bulk properties. Our calculated diffusion coefficients of H, Na, and K well agree with experimental ones when uncertainties are considered. Additional point defect parameters such as activation enthalpy, activation entropy, and activation volume are also predicted. Furthermore, the electrical conductivity of feldspars inferred from our predicted diffusivities of H, Na, and K through the Nernst-Einstein equation is compared with previous experimental data. 
论文链接: https://link.springer.com/article/10.1007%2Fs00269-015-0782-5