摘要
通过组成 -自由能关系曲线的分析 ,提出斜方顽火辉石 -正铁辉石 (MgSiO3 -FeSiO3 )固溶体出溶的临界温度约为 75 3K ;组成XFe为 0 .82左右的富铁辉石固溶体处于介稳态 ,出溶作用有利于系统自由能降低 ;出溶作用是以Fe2 + 、Mg2 + 离子逆扩散的方式进行的 ;出溶作用的推动力是上凸区域介稳相与平衡相之间的化学位差。
By analyzing composition free energy relation curves, it was proposed that the critical exsolution temperature of orthoenstatite ortheferrosilite solid solution is 753 K. Orthopyroxene on the Fe rich joinis metastable; exsolution is favourable to the decrease of free energy. Exsolution proceeds in a way of anti diffusion of Fe 2+ and Mg 2+ cations. The impetus of exsolution is the difference in chemical potential between the metastable phase and the equilibrium phases.
出处
《矿物学报》
CAS
CSCD
北大核心
2002年第3期275-279,共5页
Acta Mineralogica Sinica
基金
江苏省教育厅教育基金
