| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1490411 | Materials Research Bulletin | 2012 | 7 Pages |
The μ-pulling down technique has permitted to grow single crystal fibers, of the gross chemical formula K3Sr2NdNb10O30, having a sufficient optical quality to carry out spectroscopic studies. The crystal structure has been determined and refined to reliability factors: (i) R1 = 0.0384 (wR2 = 0.0665) at room temperature; (ii) R1 = 0.0334 (wR2 = 0.0638) at 120 K. Difference in the cationic distribution over the 15- and 12-fold sites was noticed. IR fluorescence spectra investigated under different laser excitation wavelength at 300 K and 77 K show strong emissions at 0.9 and 1.06 μm. Low temperature fluorescence behavior is compatible with Nd3+ ions located in both Sr2+ and K+ sites with 15- and 12-fold coordination, respectively.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Single crystals of TTB-K3Sr2NdNb10O30 have been grown by two different methods. ► The structures were refined using occupation ratio of Nd3+ in pentagonal sites. ► The crystal chemical formulas depend on the route of crystal preparation. ► Luminescence results corroborate the distribution of Nd3+ ions over two sites.
