Structure and Magnetic Properties of the Spin-1/2-Based Honeycomb NaNi2BiO6-δ and Its Hydrate NaNi2BiO6-δ•1.7H2O

被引：23

作者：

Seibel, Elizabeth M. ^{[1
]}

Roudebush, John H. ^{[1
]}

Ali, Mazhar N. ^{[1
]}

Ross, K. A. ^{[2
,3
,4
]}

Cava, R. J. ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[2] Johns Hopkins Univ, Inst Quantum Matter, Baltimore, MD 21218 USA

[3] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[4] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

来源：

INORGANIC CHEMISTRY | 2014年 / 53卷 / 20期

关键词：

X-RAY-DIFFRACTION; CRYSTAL-STRUCTURE; ION BATTERIES; SODIUM; SUPERCONDUCTIVITY; OXIDES; MG; DELAFOSSITES; LATTICES; LAYERS;

D O I：

10.1021/ic501390r

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We present the structure and magnetic properties of the honeycomb anhydrate NaNi2BiO6-delta and its monolayer hydrate NaNi2BiO6-delta center dot 1.7H(2)O, synthesized by deintercalation of the layered alpha-NaFeO2-type honeycomb compound Na3Ni2BiO6. The anhydrate adopts ABAB-type oxygen packing and a one-layer hexagonal unit cell, whereas the hydrate adopts an oxygen packing sequence based on a three-layer rhombohedral subcell. The metal-oxide layer separations are 5.7 angstrom in the anhydrate and 7.1 angstrom in the hydrate, making the hydrate a quasi 2-D honeycomb system. The compounds were characterized through single crystal diffraction, powder X-ray diffraction, thermogravimetric analysis, and elemental analysis. Temperature-dependent magnetic susceptibility measurements show both to have negative Weiss temperatures (-18.5 and -14.6 K, respectively) and similar magnetic moments (2.21 and 2.26 mu(B)/Ni, respectively), though the field-dependent magnetization and heat capacity data suggest subtle differences in their magnetic behavior. The magnetic moments per Ni are relatively high, which we suggest is due to the presence of a mixture of Ni2+ and Ni3+ caused by oxygen vacancies.

引用

页码：10989 / 10995

页数：7

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