Pressure-induced phase transition of Fe2TiO4: X-ray diffraction and Mössbauer spectroscopy

Pressure-induced phase transition of Fe2TiO4: X-ray diffraction and Mössbauer spectroscopy
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Fe2TiO4 的压力诱导相变:X 射线衍射和穆斯堡尔谱

DOI:
10.1016/j.jssc.2011.10.045
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发表时间:
2012
影响因子:
3.3
通讯作者:
S. Qin
S. Qin
中科院分区:
化学3区
文献类型:
--
作者:
Ye Wu;Xiang Wu;S. Qin

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利用x射线衍射和Mössbauer光谱研究了高压下fe2tio4的结构稳定性。在室温下,使用金刚石砧细胞进行了高达约24GPa的测量。实验结果表明,fe2tio4在8.7GPa时经历了从立方(Fd3)到四方(I41/amd),再到16.0GPa时的正交结构(Cmcm)的一系列相变。将fe2tio4的高压相(Cmcm)减压至环境压力。在Fe2TiO4的所有多晶态中,铁离子在高压下不与钛离子发生电荷交换,表现出高自旋亚铁的性质。
X-ray diffraction and Mössbauer spectroscopy were employed to investigate structural stability of Fe2TiO4under high pressure. Measurements were performed up to about 24GPa at room temperature using diamond anvil cell. Experimental results demonstrate that Fe2TiO4undergoes a series of phase transitions from cubic (Fd3̄m) to tetragonal (I41/amd) at 8.7GPa, and then to orthorhombic structure (Cmcm) at 16.0GPa. The high-pressure phase (Cmcm) of Fe2TiO4is kept on decompression to ambient pressure. In all polymorphs of Fe2TiO4, iron cations present a high-spin ferrous property without electric charge exchange with titanium cations at high pressure supported by Mössbauer evidences.
DOI: 10.1088/0953-8984/16/15/021
发表时间: 2004-04
期刊: Journal of Physics: Condensed Matter
影响因子: --
作者:
T. Seda;G. Hearne
通讯作者: T. Seda;G. Hearne
DOI: 10.1029/jb091ib05p04673
发表时间: 1986-04-10
期刊: JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS
影响因子: --
作者:
MAO, HK;XU, J;BELL, PM
通讯作者: BELL, PM