High-resolution near-infrared luminescence of mangenese(V) in tetrahedral oxo coordination
✍ Scribed by Markus Herren; Hans U. Güdel; Christa Albrecht; Dirk Reinen
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 398 KB
- Volume
- 183
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Manganese(V)do
crystals of Bas(PO,)sCl (apatite structure) and Ca,VO,CI (spodiosite structure) exhibit highly resolved photoluminescence in the near-infrared. It is assigned to intraconfigurational 'E -+'A2 (Td notation) transitions, and the vibrational sideband structure is interpreted in terms of bending and stretching vibrations of the (MnO*)'-entity. In lightly doped samples of the apatite compound, both the intensity and the lifetime of the luminescence (r,e x=0.56 ms) remain essentially constant up to room temperature, whereas in the spodiosite compound, the luminescence lifetime (r,,, K=0.41 ms) drops by an order of magnitude between IO K and room temperature.