中文摘要：

采用溶液法，以α-HgI2为原料，在DMSO和H20混合溶剂中生长了β-HgI2M晶体。通过XRD检测了晶体的结构特征，利用偏光显微镜研究了晶体生长的动态过程及β-HgI2M→α—HgI2的相变过程。研究表明，生长的晶体为β-HgI2M，空间结构为Cmc2 1；晶体生长界面夹角为65．02°，与β-HgI2M单胞中（110）和（110）夹角（65．16°）吻合；β-HgI2M→α-HgI2相变为结构重构的一级相变。

英文摘要：

Growth of β-HgI2M was successfully carried out in DMSO/H2O mix-solution at room temperature. XRD analysis was used to characterize the structure of the as-grown crystal. Successive crystal growth of β-HgI2M and phase transformation, β-HgI2M →α-HgI2, was recorded by micropolariscope. The results show that β-HgI2M belongs to Cmc2 1 space group, and the included angle of （110） and （110） during growth course of β-HgI2M is 65.02°, which is coincidence with 65.16° in unit cell of β-HgI2M. Moreover; its crystallizing morphology is controlled by crystal structure of β-HgI2M. Phase transformation of β-HgI2M→α-HgI2 is the first-order transition of structure reconstruction.