硅酸盐熔体结构的研究进展和问题

doi:10.11867/j.issn.1001-8166.1999.02.0168

地球科学进展 ›› 1999, Vol. 14 ›› Issue (2): 168 -171. doi: 10.11867/j.issn.1001-8166.1999.02.0168

硅酸盐熔体结构的研究进展和问题

王永强 ^①,张招崇 ^②,徐培苍 ^①,刘民武 ^①

①中国地质科学院西安地质矿产研究所,陕西西安 710054；②中国地质科学院地质研究所,北京 100037

收稿日期:1998-07-10 修回日期:1998-09-28 出版日期:1999-04-01
通讯作者: 王永强,男,1963年6月出生,副研究员,主要从事拉曼光谱的实验和研究。
基金资助:
国家自然科学基金项目“冀北印支期碱性—偏碱性杂岩体形成和演化的动力学机制”(项目编号:49402025)资助。

AVDANCE IN THE STRUCTURE STUDIES ON SILICATE MELTS

WANG Yongqiang ^①,ZHANG Zhaochong ^②,XUPeicang ^①,LIUMinwu ^①

①Xi’an Institute ofGeology andMineral resources,Chinese Academy ofGeological Sciences,Xi’an 710054,China；②Institute ofGeology,Chinese Academy ofGeological Sciences,Beijing 100037,China

Received:1998-07-10 Revised:1998-09-28 Online:1999-04-01 Published:1999-04-01

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概括地介绍了硅酸盐熔体结构的三种研究途径和方法,从硅酸盐熔体的分子聚合结构单元测试、阳离子和挥发份的结构作用、物理化学性能测试及量子化学研究等五个方面,阐明了硅酸盐熔体结构研究的主要成就,指出了该研究领域中存在的主要问题。

关键词: 硅酸盐熔体, 结构研究

Three kinds ofways and methods about the studies on structure of silicate melts are introduced in this paper. The main achievements and some problems about the structure of silicate melts are illustrated and pointed out from five research fields of silicate melts, which are molecular polymerization, the structural roles of cations and volatiles, the measurementof physical properties and chemical bonds in quantum chemistry:①“Polymerization model”is an established theory of silicate melts, however, the short quantitative description has not been carried out.②The quantitative determination of polymers in silicate melts is the keyto comprehend the“polymerizationmodel”and the properties of silicate melts quantitatively. If the three methods (TMS, MAS NMR, LR) are performed synthetically, the quantitative
measurement for polymes of silicate melts will be improved.③For the melts with high temperature and high pressure,until nowthere is no insufficient evidence to showthe translation of aluminumfromfour-coordination to six-coordination,or laboratory study aboutthe relation between the forming conditions of silicate melt and itsT-O-Tbond-angel. The above studies are important to understand abnormal viscosity and density change of silicate melts under high-pressure condition.④Two-stage dissolvingmodel of H2O in silicate melt has been put forward, but the quantitative dissolvingmodel of CO2 and other volatileswait for further studies.⑤Split phases are extensively existent in silicate melts, however the relation between split phases and structural stability in silicate melt has not been performed.

Key words: Silicate melt, Structure studies.

中图分类号:

P583

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