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物理学报. 1990, 39(2): 231-236.
doi: 10.7498/aps.39.231.
安康矿一维无公度调制结构的电子衍射研究
- 收稿日期: 1989-03-17
- 刊出日期: 1990-01-05
摘要: 用电子衍射方法研究了我国新发现的矿物安康矿(Ba0.827(Ti5.827V2.294Cr0.053)O16)的一维无公度调制结构。确定了其平均结构属四方晶系,平均结构的晶胞参数为a=10.2?,c=2.96?。沿c方向的调制波长为λ=2.30c。详细分析了安康矿电子衍射花样的特征,讨论了安康矿无公度调制结构的可能机制,提出一个空位-位移型调制结构的模型,并讨论了因位移函数初始位相各处不一而引起的
English Abstract
ELECTRON DIFFRACTION STUDY OF THE ONE DIMENSIONAL INCOMMENSURATE MODULATED STRUCTURE IN ANKANGITE
- Received Date:
17 March 1989
- Published Online:
05 January 1990
Abstract: The one-dimensional incommensurate modulated structure of ankangite (Ba0.827(Ti5.827V2.294Cr0.053)O16), a mineral recently discovered in China, has been studied by electron diffraction. Its average structure belongs to tetragonal system and unit cell parameters of the average structure are a= 10.2?, c=2.96?. The modulated wave spreading along direction c has the wave length of λ = 2.30c. The features of electron diffraction patterns are analysed in detail. The possible mechanism of the incommensurate modulated structure in ankangite is discussed and a modulated structure model of vacancy-displacive type is proposed. The disorder structure caused by the difference among initial phases for displacement functions from place to place is discussed.
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