Synthesis, crystal structure, and physical properties of Sr0.93 (Si(x)Nb(1-x)) Nb10O19 (x = 0.87)

J. Tortelier; T. J. Emge; G. Veith; M. Greenblatt

doi:10.1006/jssc.2000.8728

Synthesis, crystal structure, and physical properties of Sr_0.93 (Si(x)Nb(1-x)) Nb₁₀O₁₉ (x = 0.87)

J. Tortelier, T. J. Emge, G. Veith, M. Greenblatt

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Abstract

We present here the synthesis, crystal structure, and physical properties of a reduced niobium oxide Sr_0.93(Si(x)Nb(1-x))Nb₁₀O₁₉ (x = 0.87). Its structure was determined on single crystal by X-ray diffraction in the space group R3̄ (a(h) = 7.843(1), C(h) = 42.26(2) Å, V(h) = 2251.3(9) Å³, and Z = 6). The compound is isostructural to Na(Si(x)Nb(1-x)) Nb₁₀O₁₉ (x ≃ 0.75) and exhibits discrete [Nb₆O₁₂] clusters, Nb₂O₁₀ dimers, NbO₆ octahedra, SrO₁₂ cubo-octahedra, and SiO₄ tetrahedra. The compound is insulating with a room-temperature resistivity ˜50 Ω cm. The magnetic susceptibility data yields μ(eff) = 3.16 μ(B)/Nb, which is consistent with a 15-electron [Nb₆O₁₂] cluster, with Nb(IV) in the dimers and Nb(V) in the isolated NbO₆ octahedra. (C) 2000 Academic Press.

Original language	English
Pages (from-to)	540-545
Number of pages	6
Journal	Journal of Solid State Chemistry
Volume	152
Issue number	2
DOIs	https://doi.org/10.1006/jssc.2000.8728
State	Published - 2000
Externally published	Yes

Funding

This work was supported by the National Science Foundation-Solid State Chemistry Grant DMR-96-13106.

Funders	Funder number
National Science Foundation-Solid State Chemistry	DMR-96-13106

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10.1006/jssc.2000.8728

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title = "Synthesis, crystal structure, and physical properties of Sr0.93 (Si(x)Nb(1-x)) Nb10O19 (x = 0.87)",

abstract = "We present here the synthesis, crystal structure, and physical properties of a reduced niobium oxide Sr0.93(Si(x)Nb(1-x))Nb10O19 (x = 0.87). Its structure was determined on single crystal by X-ray diffraction in the space group R{\=3} (a(h) = 7.843(1), C(h) = 42.26(2) {\AA}, V(h) = 2251.3(9) {\AA}3, and Z = 6). The compound is isostructural to Na(Si(x)Nb(1-x)) Nb10O19 (x ≃ 0.75) and exhibits discrete [Nb6O12] clusters, Nb2O10 dimers, NbO6 octahedra, SrO12 cubo-octahedra, and SiO4 tetrahedra. The compound is insulating with a room-temperature resistivity ˜50 Ω cm. The magnetic susceptibility data yields μ(eff) = 3.16 μ(B)/Nb, which is consistent with a 15-electron [Nb6O12] cluster, with Nb(IV) in the dimers and Nb(V) in the isolated NbO6 octahedra. (C) 2000 Academic Press.",

author = "J. Tortelier and Emge, {T. J.} and G. Veith and M. Greenblatt",

year = "2000",

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AU - Tortelier, J.

AU - Emge, T. J.

AU - Veith, G.

AU - Greenblatt, M.

PY - 2000

Y1 - 2000

N2 - We present here the synthesis, crystal structure, and physical properties of a reduced niobium oxide Sr0.93(Si(x)Nb(1-x))Nb10O19 (x = 0.87). Its structure was determined on single crystal by X-ray diffraction in the space group R3̄ (a(h) = 7.843(1), C(h) = 42.26(2) Å, V(h) = 2251.3(9) Å3, and Z = 6). The compound is isostructural to Na(Si(x)Nb(1-x)) Nb10O19 (x ≃ 0.75) and exhibits discrete [Nb6O12] clusters, Nb2O10 dimers, NbO6 octahedra, SrO12 cubo-octahedra, and SiO4 tetrahedra. The compound is insulating with a room-temperature resistivity ˜50 Ω cm. The magnetic susceptibility data yields μ(eff) = 3.16 μ(B)/Nb, which is consistent with a 15-electron [Nb6O12] cluster, with Nb(IV) in the dimers and Nb(V) in the isolated NbO6 octahedra. (C) 2000 Academic Press.

AB - We present here the synthesis, crystal structure, and physical properties of a reduced niobium oxide Sr0.93(Si(x)Nb(1-x))Nb10O19 (x = 0.87). Its structure was determined on single crystal by X-ray diffraction in the space group R3̄ (a(h) = 7.843(1), C(h) = 42.26(2) Å, V(h) = 2251.3(9) Å3, and Z = 6). The compound is isostructural to Na(Si(x)Nb(1-x)) Nb10O19 (x ≃ 0.75) and exhibits discrete [Nb6O12] clusters, Nb2O10 dimers, NbO6 octahedra, SrO12 cubo-octahedra, and SiO4 tetrahedra. The compound is insulating with a room-temperature resistivity ˜50 Ω cm. The magnetic susceptibility data yields μ(eff) = 3.16 μ(B)/Nb, which is consistent with a 15-electron [Nb6O12] cluster, with Nb(IV) in the dimers and Nb(V) in the isolated NbO6 octahedra. (C) 2000 Academic Press.

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DO - 10.1006/jssc.2000.8728

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JO - Journal of Solid State Chemistry

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Synthesis, crystal structure, and physical properties of Sr_0.93 (Si(x)Nb(1-x)) Nb₁₀O₁₉ (x = 0.87)

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