Determination of goslarite-bianchite equilibria by the humidity-buffer technique at 0.1 MPa

被引：27

作者：

Chou, IM ^{[1
]}

Seal, RR ^{[1
]}

机构：

[1] US Geol Survey, Reston, VA 20192 USA

来源：

CHEMICAL GEOLOGY | 2005年 / 215卷 / 1-4期

关键词：

hydrated zinc sulfates; humidity; experimental; goslarite; bianchite;

D O I：

10.1016/j.chemgeo.2004.06.047

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Goslarite-bianchite equilibria were determined along four humidity-buffer curves at 0.1 MPa and between 27 and 36 degrees C. Results, based on tight reversals along each humidity buffer, can be represented by ln K (+/- 0.005) = 19.643-7015.38/T, where K is the equilibrium constant and T is temperature in K. Our data are in excellent agreement with several previous vapor-pressure measurements and are consistent with the solubility data reported in the literature. Thermodynamic analysis of these data yields 9.634 (+/- 0.056) kJ mol(-1) for the standard Gibbs free energy of reaction, which is in good agreement with the value of 9.658 kJ mol(-1) calculated from the thermodynamic data compiled and evaluated by Wagman et al. Published by Elsevie B.V.

引用

页码：517 / 523

页数：7

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