✦ LIBER ✦

Luminescence of lanthanide ions in hexachloroelpasolites

✍ Scribed by Peter A. Tanner

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 414 KB
Volume: 145
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(88)80165-9

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✦ Synopsis

Luminescence is reported for the 6Fr,2 term in CszNaDyCl,, for which the normalised energy gap is five vibrational quanta. The luminescence from the 'G,,, term of NdCl:-is reassigned, this being the only luminescent term of NdC& in the visible spectral region. The normalised energy gap between 4Gr,2 and 'G,,, is spanned by five vibrational quanta. For all other lanthanide ions in hexachloroelpasolites luminescence does not occur from terms with energy gaps spanned by fewer than live phonons. Terms with gaps of five or more phonons luminesce unless they are not populated under the experimental excitation conditions or unless they are depopulated in the neat materials by ion-ion cross-relaxations.

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