Refinement of the cation distribution in Nb-Mo double oxide

Refinement of the cation distribution in Nb-Mo double oxide
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Nb-Mo 双氧化物中阳离子分布的细化

DOI:
10.1007/s10947-008-0097-1
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
A. Shmakov
A. Shmakov
中科院分区:
--
文献类型:
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作者:
T. Kardash;L. Plyasova;V. M. Bondareva;A. Shmakov

文献摘要

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利用同步辐射和反常散射效应对Nb_2Mo_3O_(14)复合氧化物的粉末数据进行了结构修正,发现该材料的空间群为P21。结果表明,在参数a = 23.173 μ m,c= 4.0027 μ m的四元晶胞中,Nb ~(5+)和Mo ~(6+)离子以Mo_5 O_(14)型多边形网络结构的Mo_6八面体和Mo_7五角双锥的形式随机分布。
The structure of Nb2Mo3O14double oxide is refined from powder data using synchrotron radiation and the anomalous scattering effect; space groupP21mis found for the material. It is demonstrated that in the tetragonal unit cell with parametersa= 23.173 Å,c= 4.0027 Å Nb5+and Mo6+ions are stochastically distributed in MO6octahedra and MO7pentagonal bipyramids of the polygonal network structure of the Mo5O14type.