Pressure-induced structural transition and low-temperature recovery of sodium pentazolate  

作　　者：赵梓彤 刘然 郭琳琳 刘爽 隋明宏 刘波 姚震 王鹏 刘冰冰 Zitong Zhao;Ran Liu;Linlin Guo;Shuang Liu;Minghong Sui;Bo Liu;Zhen Yao;Peng Wang;Bingbing Liu(State Key Laboratory of Superhard Materials,College of Physics,Jilin University,Changchun 130012,China)

机构地区：[1]State Key Laboratory of Superhard Materials,College of Physics,Jilin University,Changchun 130012,China

出　　处：《Chinese Physics B》2023年第4期529-533,共5页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China(Grant No.2018YFA0305900);the National Nat-ural Science Foundation of China(Grant Nos.12174143,11634004,11847094,and 11804384);JLU Science and Technology Innovative Research Team(Grant No.2017TD-01)。

摘　　要：Pentazolate compounds have attracted extensive attention as high energy density materials.The synthesis and recovery of pentazolate compounds is of great importance for their potential applications.Here,we report the synthesis of Pmn2_(1)-NaN_(5)and Pm-Na_(2)N_(5)through compressing and laser heating pure NaN_(3)at~60 GPa.Upon decompression,the pressureinduced structural transition from Pmn2_(1)-NaN_(5)into Cm-NaN_(5)is observed in the pressure range of 14-23 GPa for the first time.The cyclo-N_(5)^(-)can be traced down to 4.7 GPa at room temperature and recovered to ambient pressure under low temperature condition(up to 160 K).The Pm-Na_(2)N_(5)is suggested to decompose into the P4/mmm-NaN_(2)at 23 GPa,and be stable at ambient conditions.This work provides insight into the high-pressure behaviors of pentazolate compounds and an alternative way to stabilize energetic polynitrogen compounds.

关 键 词：sodium pentazolate high pressure laser heating structural transition 

分 类 号：TQ131.12[化学工程—无机化工]