High-Pressure Spectroscopy Study of Zn(IO<sub>3</sub>)<sub>2</sub> Using Far-Infrared Synchrotron Radiation
oleh: Akun Liang, Robin Turnbull, Enrico Bandiello, Ibraheem Yousef, Catalin Popescu, Zoulikha Hebboul, Daniel Errandonea
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2020-12-01 |
Deskripsi
We report the first high-pressure spectroscopy study on Zn(IO<sub>3</sub>)<sub>2</sub> using synchrotron far-infrared radiation. Spectroscopy was conducted up to pressures of 17 GPa at room temperature. Twenty-five phonons were identified below 600 cm<sup>−1</sup> for the initial monoclinic low-pressure polymorph of Zn(IO<sub>3</sub>)<sub>2</sub>. The pressure response of the modes with wavenumbers above 150 cm<sup>−1</sup> has been characterized, with modes exhibiting non-linear responses and frequency discontinuities that have been proposed to be related to the existence of phase transitions. Analysis of the high-pressure spectra acquired on compression indicates that Zn(IO<sub>3</sub>)<sub>2</sub> undergoes subtle phase transitions around 3 and 8 GPa, followed by a more drastic transition around 13 GPa.