A New High-Pressure Modification of Nb2O5
A New High-Pressure Modification of Nb2O5
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DOI：
10.1006/jssc.1998.7954
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发表时间：
1998-11
影响因子：
5.4
通讯作者：
I. Zibrov;V. Filonenko;P. Werner;B. Marinder;M. Sundberg
中科院分区：
文献类型：
--
作者：
I. Zibrov;V. Filonenko;P. Werner;B. Marinder;M. Sundberg
用环形高压室在5.0和8.0GPa压力下，在800- 1400 ℃温度范围内研究了H-Nb{sub 2}O{sub 5}的相变。在P = 8.0 GPa，T = 800- 1100 ℃处理1- 10 min后，发现了B-Nb {sub 2}O{sub 5}和一种新的五氧化二铌七配位体（记为Z-Nb{sub 2}O{sub 5}）的混合物。热重分析表明样品没有还原。
The transformation of H-Nb{sub 2}O{sub 5} has been studied by using a toroid-type high-pressure chamber at pressures of 5.0 and 8.0 GPa in the temperature region 800--1400 C. A mixture of B-Nb{sub 2}O{sub 5} and a new modification of niobium pentoxide (denoted Z-Nb{sub 2}O{sub 5}) with seven-coordinated niobium was found in the samples after treatment at P = 8.0 GPa, T = 800--1100 C for 1--10 min. The structure was determined and refined by the Rietveld method from X-ray powder diffraction data. The thermogravimetric analysis showed no reduction of the sample.