Study of structural defects in γ-MnO2 by Raman spectroscopy
Study of structural defects in γ-MnO2 by Raman spectroscopy
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DOI：
10.1002/jrs.838
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发表时间：
2002-04-01
影响因子：
2.5
通讯作者：
Guyomard, D
中科院分区：
文献类型：
--
作者：
Julien, C;Massot, M;Guyomard, D
γ - mno2的结构排列目前被解释为软锰矿层在ramsdellite基体中的随机共生。利用x射线粉末衍射和拉曼散射光谱研究了具有不同结构参数Pr的多种γ - mno2样品的结构。我们证明了用拉曼散射光谱定量测定γ - mno2中存在的结构紊乱是准确的。具有γ型结构的二氧化锰的拉曼数据采用局部环境模型处理，该模型允许人们考虑与结构De Wolff缺陷对应的软锰矿共生的带波数之间的关系。版权所有:John Wiley Sons, Ltd。
The structural arrangement of gamma-MnO2 is currently explained by a random intergrowth of pyrolusite layers in a ramsdellite matrix. The structures of a large variety of gamma-MnO2 samples with various structural parameters Pr were studied by x-ray powder diffraction and Raman scattering spectroscopy. We show that elucidation of the quantitative determination of the structural disorder present in gamma-MnO2 is accurate by Raman scattering spectroscopy. The Raman data for manganese dioxides with the gamma-type structure are treated by a local environment model, which allows one to consider the relationship between the band wavenumber and the pyrolusite intergrowth that corresponds to the structural De Wolff defects. Copyright (C) 2002 John Wiley Sons, Ltd.