首页 | 本学科首页   官方微博 | 高级检索  
     


Synthesis and Structure of the New Ammonium Indium Phosphate (NH4)In(OH)PO4
Authors:A.A. FilaretovM.G. Zhizhin  L.N. KomissarovaV.P. Danilov  V.V. ChernyshevB.I. Lazoryak
Affiliation:
  • a Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 117907, Moscow, Russia
  • b Department of Chemistry, Moscow State University, 119899, Moscow, Russia
  • Abstract:A new ammonium indium phosphate (NH4)In(OH)PO4 was prepared by hydrothermal reaction in the In2O3-NH4H2PO4-NH3/OH system (T=200°C, autogenous pressure, 7 days). The formula (NH4)In(OH)PO4 was determined on the basis of chemical and thermal analysis (TG/DSC), X-ray powder diffraction and IR-spectroscopy. (NH4)In(OH)PO4 crystallizes in the tetragonal system with space group P43212 (No. 96); a=9.4232(1) Å, c=11.1766(1) Å, V=992.45(2) Å3; Z=8. The crystal structure was refined by the Rietveld method (Rw=6.35%, Rp=5.10%). The second-harmonic generation study confirmed that structure of (NH4)In(OH)PO4 does not have a center of symmetry. The cis-InO4(OH)2 octahedra form helical chains, parallel to the c-axis. The In-O-In bonds are nearly equidistant. The chains are interconnected by phosphate tetrahedra and create tunnels containing the NH4+ ions along the c-axis. (NH4)In(OH)PO4 is isostructural with RbIn(OH)PO4.
    Keywords:indium phosphate   crystal structure   Rietveld method   IR spectroscopy   second harmonic generation.
    本文献已被 ScienceDirect 等数据库收录!
    设为首页 | 免责声明 | 关于勤云 | 加入收藏

    Copyright©北京勤云科技发展有限公司  京ICP备09084417号