Department Chemie, Lehrstuhl für Anorganische Festkörperchemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377 München (Germany) http://www.cup.uni-muenchen.de/ac/schnick.
Angew Chem Int Ed Engl. 2015 Mar 27;54(14):4388-91. doi: 10.1002/anie.201410526. Epub 2015 Feb 9.
The chemical and physical properties of phosphorus oxonitride (PON) closely resemble those of silica, to which it is isosteric. A new high-pressure phase of PON is reported herein. This polymorph, synthesized by using the multianvil technique, crystallizes in the coesite structure. This represents the first occurrence of this very dense network structure outside of SiO2 . Phase-pure coesite PON (coe-PON) can be synthesized in bulk at pressures above 15 GPa. This compound was thoroughly characterized by means of powder X-ray diffraction, DFT calculations, and FTIR and MAS NMR spectroscopy, as well as temperature-dependent diffraction. These results represent a major step towards the exploration of the phase diagram of PON at very high pressures and the possibly synthesis of a stishovite-type PON containing hexacoordinate phosphorus.
氧化磷氮（PON）的化学和物理性质与硅相似，是等电子体。本文报道了一种新的 PON 高压相。这种多晶型物是通过多砧技术合成的，结晶为柯石英结构。这是在 SiO2 之外首次出现这种非常密集的网络结构。在 15 GPa 以上的压力下，可以批量合成纯相柯石英 PON（coe-PON）。通过粉末 X 射线衍射、DFT 计算、FTIR 和 MAS NMR 光谱以及温度相关衍射对该化合物进行了彻底的表征。这些结果是朝着探索非常高压下 PON 相图以及可能合成具有六配位磷的 stishovite 型 PON 的方向迈出的重要一步。
