ELECTRONIC-STRUCTURE AND PROPERTIES OF ANIONIC MIXED-VALENCE AND LAYERED CRTE3 - THE QUESTION OF EXTENDED TELLURIUM BONDING IN TRANSITION-METAL TELLURIDES

被引：31

作者：

CANADELL, E ^{[1
]}

JOBIC, S ^{[1
]}

BREC, R ^{[1
]}

ROUXEL, J ^{[1
]}

机构：

[1] INST MAT NANTES,CHIM SOLIDES LAB,F-44072 NANTES 03,FRANCE

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1992年 / 98卷 / 01期

关键词：

D O I：

10.1016/0022-4596(92)90070-C

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

CrTe3 is a layered material whose tellurium sublattice contains Te, Te2, and Te3 entities. Our magnetic susceptibility measurements are consistent with a + 3 oxidation state for Cr. This indicates three different oxidation states for the tellurium atoms, i.e., Te2-, Te2-2, and Te2-3. Conductivity measurements show this material to be a semiconductor with an activation energy of 0.35 eV. Our tight-binding band structure calculations indicate that it is a Mott-Hubbard semiconductor rather than a regular one. A study of the Te···Te overlap populations suggests that CrTe3 is a new transition metal telluride with a polymerized tellurium network. Analysis of this additional bonding within the tellurium sublattice in this phase and in related tellurides leads to a classification of the transition metal ditellurides taking into account both dimensionality and degree of polymerization. © 1992.

引用

页码：59 / 70

页数：12

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