Defect Structure of Lead Pyroniobates

Rick Ubic; J. C. Merry; A. C. Leach; I. M. Reaney

Defect Structure of Lead Pyroniobates

Rick Ubic
, J. C. Merry
, A. C. Leach
, I. M. Reaney

Micron School of Materials Science and Engineering

University of Sheffield

Research output: Contribution to journal › Article › peer-review

Abstract

The crystal structure of defect pyrochlores in the PbO - Nb2O5 system have been investigated by powder x-ray diffraction, electron diffraction, and high-resolution electron microscopy. Single-phase cubic pyrochlore was obtained for PbaNb2O5+n (n = 1.5); but for n > 1.5, discreet Pb-rich layers were observed in a manner similar to Ruddlesden Popper and Aurivillius phases. The appearance of these defect layers, which form on <111> planes of the parent pyrochlore, results in a lowering of the overall symmetry to trigonal.

Original language	American English
Journal	Institute of Physics Conference Series
Volume	168
State	Published - 2001

EGS Disciplines

Materials Science and Engineering

Cite this

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title = "Defect Structure of Lead Pyroniobates",

abstract = " The crystal structure of defect pyrochlores in the PbO - Nb2O5 system have been investigated by powder x-ray diffraction, electron diffraction, and high-resolution electron microscopy. Single-phase cubic pyrochlore was obtained for PbaNb2O5+n (n = 1.5); but for n > 1.5, discreet Pb-rich layers were observed in a manner similar to Ruddlesden Popper and Aurivillius phases. The appearance of these defect layers, which form on <111> planes of the parent pyrochlore, results in a lowering of the overall symmetry to trigonal.",

author = "Rick Ubic and Merry, \{J. C.\} and Leach, \{A. C.\} and Reaney, \{I. M.\}",

year = "2001",

language = "American English",

volume = "168",

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TY - JOUR

T1 - Defect Structure of Lead Pyroniobates

AU - Ubic, Rick

AU - Merry, J. C.

AU - Leach, A. C.

AU - Reaney, I. M.

PY - 2001

Y1 - 2001

N2 - The crystal structure of defect pyrochlores in the PbO - Nb2O5 system have been investigated by powder x-ray diffraction, electron diffraction, and high-resolution electron microscopy. Single-phase cubic pyrochlore was obtained for PbaNb2O5+n (n = 1.5); but for n > 1.5, discreet Pb-rich layers were observed in a manner similar to Ruddlesden Popper and Aurivillius phases. The appearance of these defect layers, which form on <111> planes of the parent pyrochlore, results in a lowering of the overall symmetry to trigonal.

AB - The crystal structure of defect pyrochlores in the PbO - Nb2O5 system have been investigated by powder x-ray diffraction, electron diffraction, and high-resolution electron microscopy. Single-phase cubic pyrochlore was obtained for PbaNb2O5+n (n = 1.5); but for n > 1.5, discreet Pb-rich layers were observed in a manner similar to Ruddlesden Popper and Aurivillius phases. The appearance of these defect layers, which form on <111> planes of the parent pyrochlore, results in a lowering of the overall symmetry to trigonal.

M3 - Article

VL - 168

JO - Institute of Physics Conference Series

JF - Institute of Physics Conference Series

ER -

Defect Structure of Lead Pyroniobates

Abstract

EGS Disciplines

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