Na7Fe4(PO4)(6): A mixed-valence iron phosphate containing a tetramer of edge-sharing FeO6 octahedra

被引：23

作者：

Lii, KH

机构：

[1] Institute of Chemistry, Academia Sinica, Taipei

来源：

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1996年 / 06期

关键词：

D O I：

10.1039/dt9960000819

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A novel mixed-valence iron phosphate, Na7Fe4(PO4)(6), has been synthesized by a high-temperature, high-pressure hydrothermal method and characterized by single-crystal X-ray diffraction and Mossbauer spectroscopy. The compound crystallizes in the trigonal space group R(3) over bar c with a=13.392(2), c=17.858(3) Angstrom, U=2773.7(8) Angstrom(3), Z=6 and R=0.0179. The structure consists of tetrameric units of edge-sharing FeO6 octahedra, which are connected by corner-sharing PO4 tetrahedra to form a three-dimensional framework structure, enclosing a network of cavities where the sodium cations reside. Mossbauer spectroscopy supports the presence of one Fe-II and three Fe-III in a tetrameric unit.

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页码：819 / 822

页数：4

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