The goal of this work is to report a systematic and balanced review of the progress made in recent years on the high-pressure behavior of iodates, a group of materials with multiple technological applications and peculiar behaviors under external compression. This review article presents results obtained from multiple characterization techniques which include: X-ray diffraction, Raman and infrared spectroscopy, optical-absorption, resistivity, and second-harmonic generation measurements. The discussion of the results from experiments will be combined with density-functional theory calculations which have been shown to be a very useful tool for the interpretation of experimental data. Throughout the manuscript many of the phenomena observed will be connected to the presence of a lone electron pairs of the iodine atoms in the studied iodates. The presence of the lone electron pairs plays a crucial role in the high-pressure behavior of iodates and it is associated with many of the phenomena discussed here, in particular with the pressure-induced changes in the character of iodine-oxygen bonds, which causes many physical properties to behave nonlinearly. Towards the end of this review, a discussion of current problems that remain unsolved is presented as well as proposals for possible avenues for future studies.

这项工作的目标是报告对近年来碘酸盐高压行为取得的进展的系统和平衡的回顾，碘酸盐是一组具有多种技术应用和在外部压缩下具有特殊行为的材料。这篇评论文章介绍了通过多种表征技术获得的结果，这些技术包括：X 射线衍射、拉曼和红外光谱、光吸收、电阻率和二次谐波产生测量。对实验结果的讨论将与密度泛函理论计算相结合，密度泛函理论计算已被证明是解释实验数据的非常有用的工具。在整个手稿中，观察到的许多现象将与所研究的碘酸盐中碘原子的孤电子对的存在有关。孤电子对的存在在碘酸盐的高压行为中起着至关重要的作用，它与这里讨论的许多现象有关，特别是与压力引起的碘氧键特性变化有关，这导致许多物理特性表现出非线性。在本次审查的最后，提出了对当前尚未解决的问题的讨论以及对未来研究可能途径的建议。