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

J. B. Litteer; B. H. Chen; James C. Fettinger; B. W. Eichhorn; H. L. Ju; R. L. Greene

doi:10.1021/ic990356f

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

J. B. Litteer, B. H. Chen, James C. Fettinger, B. W. Eichhorn, H. L. Ju, R. L. Greene

Department of Physics

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Abstract

The compound Sr₆V₉S₂₂O₂ was prepared from SrS, sulfur, vanadium metal, and V₂O₅ at 950 °C in an evacuated quartz tube. The compound is rhombohedral, R3, with a = 8.7538(6) Å, c = 34.934(3) Å, 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 VS₂ layers of formula [V₇S₁₄]^4- separated by [Sr₆(VOS₃)₂(S₂)]⁴⁺ layers. The latter has VOS₃^3- tetrahedra and S₂^2- 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 AM₂S₅ phases is discussed.

Original language	English
Pages (from-to)	458-462
Number of pages	5
Journal	Inorganic Chemistry
Volume	39
Issue number	3
DOIs	https://doi.org/10.1021/ic990356f
Publication status	Published - 2000 Feb 7

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry

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10.1021/ic990356f

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title = "Synthesis and magnetic and transport properties of Sr6V9S22O2: 'AM2S5' phases revisited",

abstract = "The compound Sr6V9S22O2 was prepared from SrS, sulfur, vanadium metal, and V2O5 at 950 °C in an evacuated quartz tube. The compound is rhombohedral, R3, with a = 8.7538(6) {\AA}, c = 34.934(3) {\AA}, 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 VS2 layers of formula [V7S14]4- separated by [Sr6(VOS3)2(S2)]4+ layers. The latter has VOS33- tetrahedra and S22- 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 AM2S5 phases is discussed.",

author = "Litteer, {J. B.} and Chen, {B. H.} and Fettinger, {James C.} and Eichhorn, {B. W.} and Ju, {H. L.} and Greene, {R. L.}",

year = "2000",

month = feb,

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doi = "10.1021/ic990356f",

language = "English",

volume = "39",

pages = "458--462",

journal = "Inorganic Chemistry",

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T1 - Synthesis and magnetic and transport properties of Sr6V9S22O2

T2 - 'AM2S5' phases revisited

AU - Litteer, J. B.

AU - Chen, B. H.

AU - Fettinger, James C.

AU - Eichhorn, B. W.

AU - Ju, H. L.

AU - Greene, R. L.

PY - 2000/2/7

Y1 - 2000/2/7

N2 - The compound Sr6V9S22O2 was prepared from SrS, sulfur, vanadium metal, and V2O5 at 950 °C in an evacuated quartz tube. The compound is rhombohedral, R3, with a = 8.7538(6) Å, c = 34.934(3) Å, 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 VS2 layers of formula [V7S14]4- separated by [Sr6(VOS3)2(S2)]4+ layers. The latter has VOS33- tetrahedra and S22- 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 AM2S5 phases is discussed.

AB - The compound Sr6V9S22O2 was prepared from SrS, sulfur, vanadium metal, and V2O5 at 950 °C in an evacuated quartz tube. The compound is rhombohedral, R3, with a = 8.7538(6) Å, c = 34.934(3) Å, 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 VS2 layers of formula [V7S14]4- separated by [Sr6(VOS3)2(S2)]4+ layers. The latter has VOS33- tetrahedra and S22- 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 AM2S5 phases is discussed.

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

Abstract

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