Acentric low-temperature superstructure of NaV2O5

被引：103

作者：

Lüdecke, J

Jobst, A

van Smaalen, S

Morré, E

Geibel, C

Krane, HG

机构：

[1] Univ Bayreuth, Crystallog Lab, D-95440 Bayreuth, Germany

[2] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[3] Univ Bonn, Mineral Petrol Inst, D-53115 Bonn, Germany

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.82.3633

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The low-temperature superstructure of alpha'-NaV2O5 is determined by synchrotron radiation x-ray diffraction. The high-temperature structure is confirmed to be centrosymmetric, but the modulated structure is found to be acentric Fmm2 on the 2a X 2b X 4c supercell. An analysis using superspace symmetry shows that there are modulated and nonmodulated chains of vanadium atoms, tentatively assigned to magnetic and nonmagnetic chains. The arrangement of these chains is different from any model previously considered. [S0031-9007(99)09001-8].

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页码：3633 / 3636

页数：4

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