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Chin. Phys. B, 2019, Vol. 28(1): 016103    DOI: 10.1088/1674-1056/28/1/016103
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

Effects of deuteration on the structure of NH4H2PO4 crystals characterized by neutron diffraction

Baoan Liu(刘宝安)1, Lili Zhu(朱丽丽)2, Fafu Liu(刘发付)3,4, Xun Sun(孙洵)3, Xiping Chen(陈喜平)4, Lei Xie(谢雷)4, Yuanhua Xia(夏元华)4, Guangai Sun(孙光爱)4, Xin Ju(巨新)1,4
1 Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
2 School of Materials Science and Engineering, Shandong Jiaotong University, Jinan 250357, China;
3 State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;
4 Neutron Physics Laboratory, China Academy of Engineering Physics, Mianyang 621900, China
Abstract  

A series of deuterated ammonium dihydrogen phosphate (DADP) crystals were grown and their structures were investigated by using powder neutron diffraction method. In the entire composition range, the deuterated level in the crystals is lower compared with the aqueous growth solution. The deuterium segregation coefficient in the crystals decreases with increasing deuterium content of the solution. The deuterium content in the NH4+ group is higher than that in H2PO4- group. In addition, the variations of lattice parameters are shown here.

Keywords:  DADP crystal      neutron diffraction      deuteration level  
Received:  18 October 2018      Revised:  11 November 2018      Published:  05 January 2019
PACS:  61.05.F- (Neutron diffraction and scattering)  
  61.50.-f (Structure of bulk crystals)  
  81.10.Dn (Growth from solutions)  
Fund: 

Project supported by the National Natural Science Foundation of China (Grant No. 51402173), Shandong Provincial Natural Science Joint Foundation with Universities and Scientific Research Institution, China (Grant No. ZR2017LEM006), the Neutron Physics Laboratory, China Academy of Engineering Physics (Grant No. 2014BB07), and the Fundamental Research Funds for Central Universities, China (Grant No. FRF-TP-15-099A1).

Corresponding Authors:  Lili Zhu     E-mail:  zhullcrys@163.com

Cite this article: 

Baoan Liu(刘宝安), Lili Zhu(朱丽丽), Fafu Liu(刘发付), Xun Sun(孙洵), Xiping Chen(陈喜平), Lei Xie(谢雷), Yuanhua Xia(夏元华), Guangai Sun(孙光爱), Xin Ju(巨新) Effects of deuteration on the structure of NH4H2PO4 crystals characterized by neutron diffraction 2019 Chin. Phys. B 28 016103

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