And considerable work has been done hi the growth behaviour in the tetrachloride solution concluding studies of crystal growth and growth kinetics . a crystal of dimensions 20mm x 20mm x 1mm was produced hi the tetrachloride solution by lowing temperature . and bcf spiral growth mechanism for the surface diffusion model was analyzed using the kinetic data 本文以苯为溶剂溶液降温法培养出了60mm 40mm 3mm大尺寸hhm单晶；另外探讨了hhm在四氯化碳溶液中的生长行为，溶液降温法培养出了20mm 20mm 1mm的较大尺寸单晶，并用动态循环体视显微镜观察法测定了其在不同的过饱和下主要显露晶面的法向生长速率，在较大过饱和度范围内考察了其bcf表面扩散螺位错生长机制。
