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Electron Spin Resonance of Cr

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Electron Spin Resonance of Cr

3+

in K

1–x

Tl

x

Al(SO

4

)

2

· 12 H

2

O

V. K. Jain

Department of Physics, M. D. University, Rohtak-124001, India Reprint requests to Dr. V. K. J.; E-mail: liggavansh@yahoo.com Z. Naturforsch. 58a, 303 – 305 (2003); received November 25, 2002

The electron spin resonance (ESR) of Cr3+in K1−xTlxAl(SO4)2·12H2O has been studied at 300 K and 9.45 GHz. The ESR spectrum for x between 30 and 90% shows several chromium complexes.

The variation of the zero-field splitting parameter D suggests that monovalent ions play an important role in the trigonal distortion of the water octahedron around the trivalent metal ion in alums. – PASC: 76.30 F.

Key words: ESR; Cr3+; Zero-field Splitting.

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