A new structure type of the thernary sulfide Eu1.3Nb1.9S5

被引:3
作者
Khasanova, NR
Van Tendeloo, G
Lebedev, OI
Amelinckx, S
Grippa, AY
Abakumov, AM
Istomin, SY
D'yachenko, OG
Antipov, EV
机构
[1] Univ Antwerp, RUCA, EMAT, B-2020 Antwerp, Belgium
[2] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119899, Russia
基金
俄罗斯基础研究基金会;
关键词
D O I
10.1006/jssc.2001.9501
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The structure model for the Eu1.3Nb1.9S5 compound is determined based on high-resolution electron microscopy evidence. This compound crystallizes in a hexagonal unit cell with a = 8.8732(8) Angstrom and c = 23.45(1) Angstrom. Its structure is built up as an alternating sequence of trigonal-prismatic NbS2 layers of formula [Nb7S14] and [Nb(Eu3S4)(2)] slabs along the c-direction. In the [Nb(Eu3S4)(2)] block the stacking of two close-packed (Eu3S4) layers creates octahedral interstices formed by S atoms; these cavities are occupied by Nb cations. The model is compared with structures of other Eu-containing niobium sulfides, such as Eu0.167NbS2 and the misfit compound [(EuS)(1.5)](1.15)NbS2. (C) 2002 Elsevier Science (USA).
引用
收藏
页码:345 / 353
页数:9
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