Synthesis and magnetic and transport properties of Sr6V9S22O2:: "AM2S5" phases revisited

被引：11

作者：

Litteer, JB

Chen, BH

Fettinger, JC

Eichhorn, BW ^{[1
]}

Ju, HL

Greene, RL

机构：

[1] Univ Maryland, Ctr Superconduct Res, Dept Chem, College Pk, MD 20742 USA

[2] Univ Maryland, Ctr Superconduct Res, Dept Phys, College Pk, MD 20742 USA

来源：

INORGANIC CHEMISTRY | 2000年 / 39卷 / 03期

关键词：

D O I：

10.1021/ic990356f

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The compound Sr6V9S22O2 was prepared from SrS, sulfur, vanadium metal, and V2O5 at 950 degrees C in an evacuated quartz tube. The compound is rhombohedral, R (3) over bar, with a = 8.7538(6) Angstrom, c = 34.933(3) Angstrom, and Z = 3, and shows strong preferred orientation in its XRD profiles (00l) due to the layered nature of the structure. The compound contains charged CdI2 type VSI layers of formula [V7S14](4-) separated by [Sr-6(VOS3)(2)(S-2)](4+) layers. The latter has VOS33- tetrahedra and S-2(2-) disulfide units linked by Sr2+ ions. Magnetic susceptibility and four-probe resistivity studies show essentially temperature-independent paramagnetism above 80 K and small gap semiconductor behavior, respectively. The compound has a positive Hall coefficient at room temperature. The relationship among Sr6V9S22O2, "SrV2S5" (J. Solid State Chem. 1996, 126, 189), and other AM(2)S(5) phases is discussed.

引用

页码：458 / 462

页数：5

共 40 条

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