Chem. J. Chinese Universities ›› 2004, Vol. 25 ›› Issue (10): 1813.

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Hydrothermal Synthesis and Characterizations of Na6In4[P7O24(OH)5]·4H2O

MAO Shao-Yu1, LI Man-Rong2, CHEN Hao-Hong2, HUANG Ya-Xi1, MI Jin-Xiao1, ZHAO Jing-Tai2   

  1. 1. College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;
    2. State Key Lab of High Performance Ceramics and Superfine Structure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2003-09-18 Online:2004-10-24 Published:2004-10-24

Abstract: A new sodium indium phosphate Na6In4[P7O24(OH)5]·4H2O was synthesized under a mild hydrothermal condition and its structure was determined by means of single-crystal X-ray diffraction methods. The title compound crystallizes in a hexagonal system, space group P63, with a= 0.950 23(5) nm, b=0.950 23(5) nm, c=1.694 2(2) nm, α=90°, β=90°, γ=120°, V=1.324 8(2) nm3, Z=8, structure refined to R=0.052 8 and wR=0.116 5 for2 134 independent observed reflections. The three-dimensional network structure consists of helical chains formed by apex-sharing polyhedra. The connection of the chains results in 4- and 8-polyhedral rings and cages centered by three indium metal connecting oxygen atoms formed by three 4-rings. The three-connected oxygen atom is firstly observed in indium phosphate systems.

Key words: Hydrothermal synthesis, Indium phosphate, Crystal structure

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