OPTICAL, EPR, AND ENDOR STUDIES OF CDF2 - V3+, V2+

被引:22
作者
BORCHERTS, RH
LOHR, LL
机构
[1] Scientific Laboratory, Ford Motor Company, Dearborn
[2] Department of Chemistry, University of Michigan, Ann Arbor
关键词
D O I
10.1063/1.1671043
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Single crystals of CdF2 containing either V3+ or V2+ ions have been prepared and studied by optical, EPR, and ENDOR techniques. As expected, the properties of V3+ in the eight-coordinated (cubal) environment closely resemble those of Ni2+ in octahedral sites. The ENDOR data show that Ms=±1, confirming the identification of the ion as V3+. The V2+ ions, produced by heating samples containing V3+ in Cd vapor, exhibit evidence for a large trigonal Jahn-Teller distortion of the cubal site. On the basis of the EPR and optical data it is suggested that the environment about the V2+ ions may be more nearly octahedral than cubal, thus reflecting the presence of a static trigonal field comparable in magnitude to the (undistorted) cubic field. Some optical and EPR data are presented for isoelectronic Cr3+ ions, which also display a strong Jahn-Teller effect.
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页码:5262 / +
页数:1
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