Crystal Structure of LiH2PO4 Studied by Single-Crystal Neutron Diffraction

被引：17

作者：

Oh, In Hwan ^{[1
,2
,3
]}

Lee, Kwang-Sei ^{[4
]}

Meven, Martin ^{[5
]}

Heger, Gernot ^{[6
]}

Lee, Cheol Eui ^{[1
,2
]}

机构：

[1] Korea Univ, Dept Phys, Seoul 136713, South Korea

[2] Korea Univ, Inst Nano Sci, Seoul 136713, South Korea

[3] Korea Atom Energy Res Inst, Div Neutron Sci, Taejon 305353, South Korea

[4] Inje Univ, Dept Nano Syst Engn, Gimhae 621749, South Korea

[5] Tech Univ Munich, FRM 2, D-85747 Garching, Germany

[6] Rhein Westfal TH Aachen, Inst Kristallog, D-52056 Aachen, Germany

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2010年 / 79卷 / 07期

关键词：

neutron diffraction; hydrogen bond; crystal structure; LiH2PO4 (LDP); proton conductor; PROTON CONDUCTIVITY; PHASE-TRANSITION; TEMPERATURE; PARAMETERS; PHOSPHATES; KH2PO4; STATE;

D O I：

10.1143/JPSJ.79.074606

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Structure of a LiH2PO4 (LDP) single crystal has been studied at room temperature and at 100 K by means of neutron diffraction. The LiO4 tetrahedra in LDP are linked by vertices forming chains along the a-axis, and a three-dimensional network is formed by PO4 groups connected by two different hydrogen bonds. The Li+ ions in this structure were found to be quite immobile in spite of their very light mass; The very high proton conductivity in the system may have directly to do with the relatively weak hydrogen bonds and the relatively long interoxygen distances facilitating reorientation of the proton acceptor complexes, rather than with the Li+ ionic motions.

引用

页数：4

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