Modeling H, Na, and K diffusion in plagioclase feldspar by relating point defect parameters to bulk properties

	Modeling H, Na, and K diffusion in plagioclase feldspar by relating point defect parameters to bulk properties
	Baohua Zhang; Shuangming Shan; Xiaoping Wu
	2016
发表期刊	Physics & Chemistry of Minerals
卷号	43 期号: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.
学科领域	地球深部物质与流体作用地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/6093
专题	地球内部物质高温高压实验室_地球内部物质高温高压实验室_期刊论文
推荐引用方式 GB/T 7714	Baohua Zhang,Shuangming Shan,Xiaoping Wu. Modeling H, Na, and K diffusion in plagioclase feldspar by relating point defect parameters to bulk properties[J]. Physics & Chemistry of Minerals,2016,43(2):151-159.
APA	Baohua Zhang,Shuangming Shan,&Xiaoping Wu.(2016).Modeling H, Na, and K diffusion in plagioclase feldspar by relating point defect parameters to bulk properties.Physics & Chemistry of Minerals,43(2),151-159.
MLA	Baohua Zhang,et al."Modeling H, Na, and K diffusion in plagioclase feldspar by relating point defect parameters to bulk properties".Physics & Chemistry of Minerals 43.2(2016):151-159.

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