易解石族矿物变生非晶态的高温X射线衍射和高温透射电镜的研究  

XRD AND TEM AT STUDIES OF THE METAMICT AESCHYNITE GROUP MINERALS AT ELEVATED TEMPERATURES

作　　者：贡伟亮[1] 史国顺 孙文华[3] 陈岩[3] 

机构地区：[1]中国科学院地球化学研究所,贵阳550002 [2]北京理化测试中心,北京100080 [3]武汉工业大学,武汉430070

出　　处：《矿物学报》1992年第2期120-126,T001,共8页Acta Mineralogica Sinica

基　　金：国家自然科学基金

摘　　要：本文运用高温X射线衍射和高温透射电镜等就位测量技术,动态研究了易解石族矿物变生非晶态的高温相变和晶化过程。结果表明,易解石相和黑稀金矿相为晶变和相转变的复杂关系,这种复杂关系受A组阳离子平均离子半径控制。本工作首次观察到变生非晶态MSⅠ向MSⅡ的结构弛豫作用并揭示了铈铌易解石变生非晶态的晶化动力学过程。Phase transition and recrystallization of some metamict minerals were studied by means of XRD and TEM at elevated temperatures in this paper. The complex relations are expected to be involved in morphotropy and phase transition between aeschynite and euxenite, depending on the average ionic radii of Group-A atoms in (Nb,Ti)_2O_8 crystals. The structural relaxation from metamict MSI of nioboaeschynite-(Ce) to MSⅡ (amorphous) was firstly reported, together with the results of crystallo-dynamics.

关 键 词：易解石 变生非晶态 X射线衍射 

分 类 号：P575[天文地球—矿物学]