K[AsW₂O₉], the first member of the arsenate-tungsten bronze family: Synthesis, structure, spectroscopic and non-linear optical properties

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• 作者：Evgeny V. Alekseev ; Olivier Felbinger ; Shijun Wu ; Thomas Malcherek ; Wulf Depmeier ; Giuseppe Modolo ; Thorsten M. Gesing ; Sergey V. Krivovichev ; Evgeny V. Suleimanov ; Tatiana A. Gavrilova ; Lev D. Pokrovsky ; Alexey M. Pugachev ; Nikolay V. Surovtsev ; Victor V. Atuchin
• 关键词：Bronze ; Tungsten ; Arsenic ; Non-linear optical properties
• 刊名：Journal of Solid State Chemistry
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：204
• 期：Complete
• 页码：59-63
• 全文大小：1549 K

文摘

K[AsW₂O₉], prepared by high-temperature solid-state reaction, is the first member of the arsenate-tungsten bronze family. The structure of K[AsW₂O₉] is based on a 3-dimensional (3D) oxotungstate-arsenate framework with the non-centrosymmetric P2₁2₁2₁ space group, a=4.9747(3) ?, b=9.1780(8)  ?, c=16.681(2)  ?. The material was characterized using X-ray diffraction, scanning electron microscopy (SEM), differential scanning calorimetry (DSC), Raman and infrared (IR) spectroscopic techniques. The results of DSC demonstrate that this phase is stable up to 1076 K. Second harmonic generation (SHG) measurements performed on a powder sample demonstrate noticeable (0.1 of LiIO₃) non-linear optical (NLO) activity.