High oxygen pressures and the stabilization of the highest oxidation states of transition elements

G. Demazeau; D. Y. Jung; A. Largeteau; C. Cros; J. H. Choy

doi:10.1016/S0925-8388(97)00378-2

High oxygen pressures and the stabilization of the highest oxidation states of transition elements

G. Demazeau
, D. Y. Jung
, A. Largeteau
, C. Cros
, J. H. Choy

Université de Bordeaux I
ENSCPB Ecole National Supérieure de Chimie et Physique de Bordeaux
University of Illinois at Urbana-Champaign
Seoul National University

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

9 Scopus citations

Abstract

The stabilization of the highest oxidation states n + of transition elements Mⁿ⁺ is an important way of evaluating the role of the covalency of the (Mⁿ⁺-O) bond in the physico-chemical properties of corresponding oxygen lattices. Recently, using high oxygen pressures, Ir(VI) has been stabilized in A₂BIr(VI)O₆ oxides with the perovskite-type structure (A = La,Ba,Sr; B = Ca,Sr,Mg,Zn,Li). Through XRD and XANES analyses, the Mⁿ⁺-O distance and the splitting energy between t_2g and e_g levels at the Ir(VI) site have been evaluated. The magnetic properties of such ordered A₂BIrⁿ⁺ O₆ perovskites (n = IV,V,VI) have been discussed as a function of the covalency of the Irⁿ⁺-O bond and the Irⁿ⁺-O distance.

Original language	English
Pages (from-to)	191-193
Number of pages	3
Journal	Journal of Alloys and Compounds
Volume	262-263
DOIs	https://doi.org/10.1016/S0925-8388(97)00378-2
State	Published - 14 Nov 1997
Externally published	Yes

Keywords

High oxidation states
High oxygen pressures
Ir(VI) oxides

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10.1016/S0925-8388(97)00378-2

Cite this

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title = "High oxygen pressures and the stabilization of the highest oxidation states of transition elements",

abstract = "The stabilization of the highest oxidation states n + of transition elements Mn+ is an important way of evaluating the role of the covalency of the (Mn+-O) bond in the physico-chemical properties of corresponding oxygen lattices. Recently, using high oxygen pressures, Ir(VI) has been stabilized in A2BIr(VI)O6 oxides with the perovskite-type structure (A = La,Ba,Sr; B = Ca,Sr,Mg,Zn,Li). Through XRD and XANES analyses, the Mn+-O distance and the splitting energy between t2g and eg levels at the Ir(VI) site have been evaluated. The magnetic properties of such ordered A2BIrn+ O6 perovskites (n = IV,V,VI) have been discussed as a function of the covalency of the Irn+-O bond and the Irn+-O distance.",

keywords = "High oxidation states, High oxygen pressures, Ir(VI) oxides",

author = "G. Demazeau and Jung, \{D. Y.\} and A. Largeteau and C. Cros and Choy, \{J. H.\}",

year = "1997",

month = nov,

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doi = "10.1016/S0925-8388(97)00378-2",

language = "English",

volume = "262-263",

pages = "191--193",

journal = "Journal of Alloys and Compounds",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - High oxygen pressures and the stabilization of the highest oxidation states of transition elements

AU - Demazeau, G.

AU - Jung, D. Y.

AU - Largeteau, A.

AU - Cros, C.

AU - Choy, J. H.

PY - 1997/11/14

Y1 - 1997/11/14

N2 - The stabilization of the highest oxidation states n + of transition elements Mn+ is an important way of evaluating the role of the covalency of the (Mn+-O) bond in the physico-chemical properties of corresponding oxygen lattices. Recently, using high oxygen pressures, Ir(VI) has been stabilized in A2BIr(VI)O6 oxides with the perovskite-type structure (A = La,Ba,Sr; B = Ca,Sr,Mg,Zn,Li). Through XRD and XANES analyses, the Mn+-O distance and the splitting energy between t2g and eg levels at the Ir(VI) site have been evaluated. The magnetic properties of such ordered A2BIrn+ O6 perovskites (n = IV,V,VI) have been discussed as a function of the covalency of the Irn+-O bond and the Irn+-O distance.

AB - The stabilization of the highest oxidation states n + of transition elements Mn+ is an important way of evaluating the role of the covalency of the (Mn+-O) bond in the physico-chemical properties of corresponding oxygen lattices. Recently, using high oxygen pressures, Ir(VI) has been stabilized in A2BIr(VI)O6 oxides with the perovskite-type structure (A = La,Ba,Sr; B = Ca,Sr,Mg,Zn,Li). Through XRD and XANES analyses, the Mn+-O distance and the splitting energy between t2g and eg levels at the Ir(VI) site have been evaluated. The magnetic properties of such ordered A2BIrn+ O6 perovskites (n = IV,V,VI) have been discussed as a function of the covalency of the Irn+-O bond and the Irn+-O distance.

KW - High oxidation states

KW - High oxygen pressures

KW - Ir(VI) oxides

UR - https://www.scopus.com/pages/publications/0031275485

U2 - 10.1016/S0925-8388(97)00378-2

DO - 10.1016/S0925-8388(97)00378-2

M3 - Article

AN - SCOPUS:0031275485

SN - 0925-8388

VL - 262-263

SP - 191

EP - 193

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

High oxygen pressures and the stabilization of the highest oxidation states of transition elements

Abstract

Keywords

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