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用高温晶体生长实时观察装置,发现了KABO晶体生长形态随着生长体系过饱和度的增大从六方形态逐渐向三角形态过渡,然后又从三角形态逐渐向六方枝蔓晶形态过渡的过程.通过KABO生长溶液高温拉曼谱的测试结果,证明了溶液中存在[BO3]3-三角形、[AlO4]5-四面体生长基元.运用负离子配位多面体生长基元理论模型,分析了KABO晶体上述生长形态演化的机理.发现KABO的生长形态是由其内部结构和生长基元共同决定的,在不同过饱和度溶液中,KABO生长基元的种类和维度将会发生变化,由此相应引起了KABO的生长形态从六方形态到三角形态,又从三角形态向六方枝蔓晶形态的演变过程.
The growth of KABO crystal was observed from the hexagonal phase to the triangular phase with the increase of the supersaturation of the growth system, and then the transition from the triangular phase to the hexagonal dendrite phase was also carried out by using the real-time observation device of high temperature crystal growth. The experimental results of the Raman spectra of the growth solution show that the [BO3] 3-triangle and [AlO4] 5-tetrahedral growth motifs exist in the solution. The mechanism of morphological evolution was found that the growth morphology of KABO is determined by its internal structure and growth motifs. KABO growth motif types and dimensions will change in different supersaturated solutions, and thus KABO Of the growth pattern from the hexagonal to the triangular morphology, but also from the triangular morphology to hexagonal dendrite morphology evolution.