Structural investigation of the ammonium intercalates of titanium and niobium disulfides

M. J. McKelvy; G. A. Wiegers; J. M. Dunn; V. G. Young; W. S. Glaunsinger

doi:10.1016/0167-2738(90)90416-O

Structural investigation of the ammonium intercalates of titanium and niobium disulfides

M. J. McKelvy, G. A. Wiegers, J. M. Dunn, V. G. Young, W. S. Glaunsinger

Chemistry (Twin Cities)

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Abstract

The ammonium intercalates (NH⁺₄)_y'TiS^y'-₂, y'=0.21 and 0.23, and (NH⁺₄)_0.19NbS^0.19-₂ have been synthesized and characterized by X-ray powder diffraction, thermogravimetric analysis, vapor pressure measurements and evolved gas analysis. These compounds have six-layer stage-II structures with rhombohedral, or nearly rhombohedral, symmetry. A comparison of calculated and observed X-ray powder diffraction intensities for (NH⁺₄)_0.21TiS^0.21-₂ (a=3.1416 and c=42.73 A ̊) shows good agreement with trigonal prismatic NH⁺₄ coordination in the van der Waals gap. X-ray powder diffraction also suggests the presence of substantial local-layer disorder for many of these compounds, which is probably associated with the low temperatures required for synthesis.

Original language	English (US)
Pages (from-to)	163-170
Number of pages	8
Journal	Solid State Ionics
Volume	38
Issue number	3-4
DOIs	https://doi.org/10.1016/0167-2738(90)90416-O
State	Published - May 1990

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title = "Structural investigation of the ammonium intercalates of titanium and niobium disulfides",

abstract = "The ammonium intercalates (NH+4)y'TiSy'-2, y'=0.21 and 0.23, and (NH+4)0.19NbS0.19- 2 have been synthesized and characterized by X-ray powder diffraction, thermogravimetric analysis, vapor pressure measurements and evolved gas analysis. These compounds have six-layer stage-II structures with rhombohedral, or nearly rhombohedral, symmetry. A comparison of calculated and observed X-ray powder diffraction intensities for (NH+4)0.21TiS0.21-2 (a=3.1416 and c=42.73 A ̊) shows good agreement with trigonal prismatic NH+4 coordination in the van der Waals gap. X-ray powder diffraction also suggests the presence of substantial local-layer disorder for many of these compounds, which is probably associated with the low temperatures required for synthesis.",

author = "McKelvy, {M. J.} and Wiegers, {G. A.} and Dunn, {J. M.} and Young, {V. G.} and Glaunsinger, {W. S.}",

year = "1990",

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doi = "10.1016/0167-2738(90)90416-O",

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volume = "38",

pages = "163--170",

journal = "Solid State Ionics",

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T1 - Structural investigation of the ammonium intercalates of titanium and niobium disulfides

AU - McKelvy, M. J.

AU - Wiegers, G. A.

AU - Dunn, J. M.

AU - Young, V. G.

AU - Glaunsinger, W. S.

PY - 1990/5

Y1 - 1990/5

N2 - The ammonium intercalates (NH+4)y'TiSy'-2, y'=0.21 and 0.23, and (NH+4)0.19NbS0.19- 2 have been synthesized and characterized by X-ray powder diffraction, thermogravimetric analysis, vapor pressure measurements and evolved gas analysis. These compounds have six-layer stage-II structures with rhombohedral, or nearly rhombohedral, symmetry. A comparison of calculated and observed X-ray powder diffraction intensities for (NH+4)0.21TiS0.21-2 (a=3.1416 and c=42.73 A ̊) shows good agreement with trigonal prismatic NH+4 coordination in the van der Waals gap. X-ray powder diffraction also suggests the presence of substantial local-layer disorder for many of these compounds, which is probably associated with the low temperatures required for synthesis.

AB - The ammonium intercalates (NH+4)y'TiSy'-2, y'=0.21 and 0.23, and (NH+4)0.19NbS0.19- 2 have been synthesized and characterized by X-ray powder diffraction, thermogravimetric analysis, vapor pressure measurements and evolved gas analysis. These compounds have six-layer stage-II structures with rhombohedral, or nearly rhombohedral, symmetry. A comparison of calculated and observed X-ray powder diffraction intensities for (NH+4)0.21TiS0.21-2 (a=3.1416 and c=42.73 A ̊) shows good agreement with trigonal prismatic NH+4 coordination in the van der Waals gap. X-ray powder diffraction also suggests the presence of substantial local-layer disorder for many of these compounds, which is probably associated with the low temperatures required for synthesis.

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JO - Solid State Ionics

JF - Solid State Ionics

IS - 3-4

ER -

Structural investigation of the ammonium intercalates of titanium and niobium disulfides

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