Experimental studies of interaction between water and albite melts  

作　　者：孙樯 谢鸿森 郑海飞 郭捷 丁东业 

出　　处：《Science China Earth Sciences》2002年第11期999-1007,共9页中国科学（地球科学英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 40103005 and 10032040)

摘　　要：On the basis of FTIR and Raman spectra studies on hydrous albite glasses, it is found that there exist two water solubility mechanisms in albite melts simultaneously. On the one hand, water interacts with Al -O°-Al to produce the Q3 Al-OH, leading to depolymerization, and this results in the appearance of 4500 cm(1 in FTIR spectra and 900 cm(1 in Raman spectra. On the other hand, the exchange of H+ in water with Na+ in albite melt as charge-balancing cation occurs at the same time. In the initial stage, the production of Al -OH is the dominant solubility mechanism, at the stage of higher water contents, the exchange of H+ with Na+ becomes the important dissolution mechanism. The dissolution of water into albite melt can be expressed as H2O+ 3NaAlSi3O8 = 2NaAl(OH)Si3O7.5 +HAlSi3O8 +NaOH.On the basis of FTIR and Raman spectra studies on hydrous albite glasses, it is found that there exist two water solubility mechanisms in albite melts simultaneously. On the one hand, water interacts with Al-O° -Al to produce the Q3 Al-OH, leading to depolymerization, and this results in the appearance of 4500 cm-1 in FTIR spectra and 900 cm-1 in Raman spectra. On the other hand, the exchange of H+ in water with Na+ in albite melt as charge-balancing cation occurs at the same time. In the initial stage, the production of Al-OH is the dominant solubility mechanism, at the stage of higher water contents, the exchange of H+ with Na+ becomes the important dissolution mechanism. The dissolution of water into albite melt can be expressed as H2O+ 3NaAlSi3O8 = 2NaAl(OH)Si3O7,5 +HAlSi3O8 +NaOH.

关 键 词：water  ALBITE glasses  SOLUBILITY mechanism. 

分 类 号：P578[天文地球—矿物学]