| 亚稳碘化汞(β-HgI2M)晶体生长与相变 |
| Growth and Phase Transformation of Metastable β-HgI2M |
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| 摘要: 采用溶液法，以α-HgI2为原料，在DMSO和H2O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Cmc21；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。 |
| 关键词: 碘化汞 亚稳态晶体 晶体生长 晶体结构 相变 |
| 基金项目: 国家自然科学基金（No.51502234，11404251）、陕西省教育厅科研计划项目（No.15JS040）和西安工业大学省级重点实验室开放基金（No.ZSKJ201414）资助。 |
| Abstract: 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 Cmc21 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. |
| Keywords: mercuric iodide metastable crystal crystal growth crystal structure phase transformation |
| 投稿时间：2016-03-07 修订日期：2016-05-18 |
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| 许岗,李俊英,谷智,南瑞华,冯亚西.亚稳碘化汞(β-HgI2M)晶体生长与相变[J].无机化学学报,2016,32(7):1135-1140. |
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