NaV1-xP2S6 (x = 0.16): A New Compound with Infinite Straight (1/
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- 作者：Servane Coste ; Eric Gautier ; Michel Evain ; Martine Bujoli-Doeuff ; Raymond Brec ; Sté ; phane Jobic ; and Mercouri G. Kanatzidis
- 刊名：Chemistry of Materials
- 出版年：2003
- 出版时间：June 17, 2003
- 年：2003
- 卷：15
- 期：12
- 页码：2323 - 2327
- 全文大小：390K
- 年卷期：v.15,no.12(June 17, 2003)
- ISSN：1520-5002
文摘
The new 1D chalcogenophosphate material NaV0.837(6)P2S6 has been synthesized and itsstructure determined by X-ray powder diffraction analysis. This compound crystallizes inthe monoclinic space group P21/n with a = 6.9677(3) Å, b = 5.9059(2) Å, c = 21.4537(8) Å,and 
= 92.962(2)
[Z = 4, V = 881.66(8) Å3]. The Rietveld refinement led to Rp/Rwp = 0.0208/0.0271 (for 94 parameters refined). The material is isostructural with 1D-NaCrP2S6 andcontains infinite (1/
)[V0.837(6)P2S6]- chains consisting of randomly occupied edge-sharing [VS6]octahedra defining zigzag (1/)[VS4] ribbons that are capped by tetradendate [P2S6] ethane-like groups linked to three successive [VS6] polyhedra. Because of the nonstoichiometry ofthe phase, the charge balance can be written as Na+(V4+)0.486(V3+)0.351(P4+)2(S2-)6. NaV0.837(6)P2S6is soluble in strongly polar organic solvents such as N-methylformamide (NMF). Theexfoliation of NaV0.837(6)P2S6 in NMF leads to gels or to colored colloidal solutions with complexfluid behavior that depends strongly on concentration.
= 92.962(2) [Z = 4, V = 881.66(8) Å3]. The Rietveld refinement led to Rp/Rwp = 0.0208/0.0271 (for 94 parameters refined). The material is isostructural with 1D-NaCrP2S6 andcontains infinite (1/)[V0.837(6)P2S6]- chains consisting of randomly occupied edge-sharing [VS6]octahedra defining zigzag (1/)[VS4] ribbons that are capped by tetradendate [P2S6] ethane-like groups linked to three successive [VS6] polyhedra. Because of the nonstoichiometry ofthe phase, the charge balance can be written as Na+(V4+)0.486(V3+)0.351(P4+)2(S2-)6. NaV0.837(6)P2S6is soluble in strongly polar organic solvents such as N-methylformamide (NMF). Theexfoliation of NaV0.837(6)P2S6 in NMF leads to gels or to colored colloidal solutions with complexfluid behavior that depends strongly on concentration.