Lattice dynamical study of alkaline atom vibrations with anharmonic interactions in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si3.gif" overflow="scroll"><mml:mrow><mml:mi>β</mml:mi></mml:mrow></mml:math>-pyrochlore oxides

Hasegawa, Tetsuya; Ogita, Norio; Nagao, Y.; Yamaura, Jun‐ichi; Hiroi, Zenji; Udagawa, Masayuki

doi:10.1016/j.physc.2009.11.006

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…Recent studies of KOs 2 O 6 with the pyrochlore structure have concluded that K is in the 8b site, but that it shows anharmonicity along the 111 direction. 20,21 However, these studies of KOs 2 O 6 did not actually provide a refinement of the ADPs of the K atom, and apparently there has never been a refinement of ADPs of an A cation for a AM 2 O 6 composition with the pyrochlore structure. Anharmonic thermal motion has been well studied for ZnS, ZnSe, ZnTe, and GaP.…”

Section: ' Discussionmentioning

confidence: 99%

Structural Studies and Electrical Properties of Cs/Al/Te/O Phases with the Pyrochlore Structure

Siritanon

Stalick

et al. 2011

Inorg. Chem.

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A series of polycrystalline and single crystal cesium aluminum tellurates with the pyrochlore structure have been prepared and characterized. The variations in cell edge for the Cs/Al/Te/O phases range from 10.06 Å for the Al rich limit to 10.14 Å for the Te rich limit. Rietveld structural analyses based on both X-ray and neutron diffraction data were performed on 5 different compositions. Single crystals of 3 compositions were prepared and studied by X-ray diffraction. The anharmonic component of the thermal motion for Cs was small but became significant on replacing Cs with Rb. A maximum in the electrical conductivity of about 0.1 S/cm is found in the middle of this range close to the ideal composition of CsAl(1/3)Te(5/3)O(6). The conductivity is attributed to filled Te 5s states associated with Te(4+) lying just below the conduction band based on empty Te 5s states associated with Te(6+). The relatively large Te(4+) ion is compressed by the lattice, and as this compression increases the filled 5s states approach the conduction band and thereby increases conductivity.

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Section: ' Discussionmentioning

confidence: 99%

Structural Studies and Electrical Properties of Cs/Al/Te/O Phases with the Pyrochlore Structure

Siritanon

Stalick

et al. 2011

Inorg. Chem.

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Single crystal growth and structure refinements of CsMxTe2−xO6 (M=Al, Ga, Ge, In) pyrochlores

Siritanon¹,

Sleight²,

Subramanian³

2011

Materials Research Bulletin

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Frequency of Filler Vibrations in CoSb₃Skutterudites: A Mechanical Interpretation

2013

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Lattice dynamical study of alkaline atom vibrations with anharmonic interactions in β-pyrochlore oxides

Cited by 3 publications

References 12 publications

Structural Studies and Electrical Properties of Cs/Al/Te/O Phases with the Pyrochlore Structure

Structural Studies and Electrical Properties of Cs/Al/Te/O Phases with the Pyrochlore Structure

Single crystal growth and structure refinements of CsMxTe2−xO6 (M=Al, Ga, Ge, In) pyrochlores

Frequency of Filler Vibrations in CoSb₃Skutterudites: A Mechanical Interpretation

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Lattice dynamical study of alkaline atom vibrations with anharmonic interactions in β-pyrochlore oxides

Cited by 3 publications

References 12 publications

Structural Studies and Electrical Properties of Cs/Al/Te/O Phases with the Pyrochlore Structure

Structural Studies and Electrical Properties of Cs/Al/Te/O Phases with the Pyrochlore Structure

Single crystal growth and structure refinements of CsMxTe2−xO6 (M=Al, Ga, Ge, In) pyrochlores

Frequency of Filler Vibrations in CoSb3Skutterudites: A Mechanical Interpretation

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Frequency of Filler Vibrations in CoSb₃Skutterudites: A Mechanical Interpretation