Structural transitions in NaNH2 via recrystallization under high pressure

被引：0

作者：

黄艳萍 ^{[1
]}

黄晓丽 ^{[1
]}

王鑫 ^{[1
]}

张文亭 ^{[1
]}

周迪 ^{[1
]}

周强 ^{[1
]}

刘冰冰 ^{[1
]}

崔田 ^{[1
]}

机构：

[1] College of Physics, State Key Laboratory of Superhard Materials, Jilin University

来源：

Chinese Physics B | 2019年 / 09期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

high pressure; sodium amide; phase transition; recrystallization;

D O I：

暂无

中图分类号：

TB34 [功能材料];

学科分类号：

080501 ;

摘要：

Multiple phase transitions are detected in sodium amide(NaNH), an important hydrogen storage material, upon compression in diamond anvil cells(DAC) by using Raman spectroscopy and x-ray diffraction(XRD) measurements.Additional Bragg reflections appear on lower and higher angle sides of the original ones at ～1.07 GPa and 1.84 GPa,accompanied by obvious changes in Raman spectroscopy, respectively.It reveals that NaNHundergoes the high-pressure phase sequence(α–β–γ) up to 20 GPa at room temperature.Spectral analysis indicates an orthorhombic structure with PBAN space group for the γ phase.We also experimentally observe high pressure induced recrystallization in alkaline amide compounds for the first time.

引用

页码：325 / 329

页数：5

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