The fine structure of YCuO2+xdelafossite determined by synchrotron powder diffraction and electron microscopy

G. Van Tendeloo; O. Garlea; C. Darie; C. Bougerol-Chaillout; P. Bordet

doi:10.1006/jssc.2000.9018

The fine structure of YCuO_2+xdelafossite determined by synchrotron powder diffraction and electron microscopy

G. Van Tendeloo, O. Garlea, C. Darie, C. Bougerol-Chaillout, P. Bordet

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

43 Scopus citations

Abstract

YCuO₂ delafossite crystallizes into two stacking variants; hexagonal 2H or rhombohedral 3R, depending on the preparation conditions. The structure of the fully oxygenated material YCuO_2.50 has been determined as orthorhombic (a_o = 6.1961 Å; b_o = 11.2158 Å; c_o = 7.1505 Å; space group Pnma). The structure is based on the hexagonal 2H structure (a_o=a_H√3; b_o=C_H; C_o=2a_H). Upon incomplete oxidation, a different YCuO_z phase with ideal composition YCuO_2.33 and lattice parameters a_H√3, a_H√3, c_H is also formed. Diffraction patterns are often very complex because of the presence of planar defects and intergrowth of both phases. Under electron beam irradiation, oxygen is released from the structure and one phase gradually transforms into the other.

Original language	English
Pages (from-to)	428-436
Number of pages	9
Journal	Journal of Solid State Chemistry
Volume	156
Issue number	2
DOIs	https://doi.org/10.1006/jssc.2000.9018
State	Published - 2001
Externally published	Yes

Keywords

Delafossite
Electron microscopy
Oxygen ordering
X-ray diffraction

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10.1006/jssc.2000.9018

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title = "The fine structure of YCuO2+xdelafossite determined by synchrotron powder diffraction and electron microscopy",

abstract = "YCuO2 delafossite crystallizes into two stacking variants; hexagonal 2H or rhombohedral 3R, depending on the preparation conditions. The structure of the fully oxygenated material YCuO2.50 has been determined as orthorhombic (ao = 6.1961 {\AA}; bo = 11.2158 {\AA}; co = 7.1505 {\AA}; space group Pnma). The structure is based on the hexagonal 2H structure (ao=aH√3; bo=CH; Co=2aH). Upon incomplete oxidation, a different YCuOz phase with ideal composition YCuO2.33 and lattice parameters aH√3, aH√3, cH is also formed. Diffraction patterns are often very complex because of the presence of planar defects and intergrowth of both phases. Under electron beam irradiation, oxygen is released from the structure and one phase gradually transforms into the other.",

keywords = "Delafossite, Electron microscopy, Oxygen ordering, X-ray diffraction",

author = "{Van Tendeloo}, G. and O. Garlea and C. Darie and C. Bougerol-Chaillout and P. Bordet",

year = "2001",

doi = "10.1006/jssc.2000.9018",

language = "English",

volume = "156",

pages = "428--436",

journal = "Journal of Solid State Chemistry",

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T1 - The fine structure of YCuO2+xdelafossite determined by synchrotron powder diffraction and electron microscopy

AU - Van Tendeloo, G.

AU - Garlea, O.

AU - Darie, C.

AU - Bougerol-Chaillout, C.

AU - Bordet, P.

PY - 2001

Y1 - 2001

N2 - YCuO2 delafossite crystallizes into two stacking variants; hexagonal 2H or rhombohedral 3R, depending on the preparation conditions. The structure of the fully oxygenated material YCuO2.50 has been determined as orthorhombic (ao = 6.1961 Å; bo = 11.2158 Å; co = 7.1505 Å; space group Pnma). The structure is based on the hexagonal 2H structure (ao=aH√3; bo=CH; Co=2aH). Upon incomplete oxidation, a different YCuOz phase with ideal composition YCuO2.33 and lattice parameters aH√3, aH√3, cH is also formed. Diffraction patterns are often very complex because of the presence of planar defects and intergrowth of both phases. Under electron beam irradiation, oxygen is released from the structure and one phase gradually transforms into the other.

AB - YCuO2 delafossite crystallizes into two stacking variants; hexagonal 2H or rhombohedral 3R, depending on the preparation conditions. The structure of the fully oxygenated material YCuO2.50 has been determined as orthorhombic (ao = 6.1961 Å; bo = 11.2158 Å; co = 7.1505 Å; space group Pnma). The structure is based on the hexagonal 2H structure (ao=aH√3; bo=CH; Co=2aH). Upon incomplete oxidation, a different YCuOz phase with ideal composition YCuO2.33 and lattice parameters aH√3, aH√3, cH is also formed. Diffraction patterns are often very complex because of the presence of planar defects and intergrowth of both phases. Under electron beam irradiation, oxygen is released from the structure and one phase gradually transforms into the other.

KW - Delafossite

KW - Electron microscopy

KW - Oxygen ordering

KW - X-ray diffraction

UR - http://www.scopus.com/inward/record.url?scp=0034811463&partnerID=8YFLogxK

U2 - 10.1006/jssc.2000.9018

DO - 10.1006/jssc.2000.9018

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VL - 156

SP - 428

EP - 436

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 2

ER -

The fine structure of YCuO_2+xdelafossite determined by synchrotron powder diffraction and electron microscopy

Abstract

Keywords

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