Determination of Dendrite Morphology and Its Crystallographic Orientation in Li[AlSiO₄]-SiO₂ Systems

• 责任者：Wang Lijie (Faculty of Earth Sciences ; China University of Geosciences ; Wuhan 430074 ; China) ; Zhao Shanrong
• 刊名：Journal of Mineralogy and Petrology
• 出版年：2010
• 卷期：30(2)
• 关键词：晶体生长 ; crystal growth
• 页码：p.14-20
• 图表：5 illus., 2 tables, 12 refs.
• 分类号：0700
• issnNo：ISSN1001-6872
• isbnNo：CN51-1143/TD

The dendrite morphology, the crystallographic orientation of dendrite and the crystallization capacity of Li[AlSiO₄]-SiO₂ system are studied on the basis of observation of polar light microscopy( PL)and scanning electron microscopy (SEM). It is shown that cross-shaped dendrite belongs to keatite solid solution and the snow-shaped dendrite belongs to β-quartz solid solution. In comparison of Li[AlSiO₄]-SiO₂ system with K[AlSi₃O₈]-SiO₂ system, it is found that crystallization capacity is different between these two systems. The crystalline content of Li[AlSiO₄]-SiO₂ system is bigger than that of the K[AlSi₃O₈]-SiO₂ system, and the dendrite branch is also thicker. Therefore, Li-ion is more effective than K-ion in the crystallization of framework silicate melt.