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- W2007111186 abstract "LiCaAlF6 (LiCAF) and LiSrAlF6 (LiSAF) crystal hosts doped with trivalent positive lanthanide ions (Ln3+) were studied via defect simulation techniques and crystal field parameter calculations. Depending on the ratio of ionic radius of the dopant to the host divalent cation, the luminescent ions can occupy the Sr2+ (or Ca2+) site or the Al3+. When the dopant enters at the divalent cation site, charge compensation is needed that changes drastically the starting symmetry of this site. However, when the Al3+ site is preferred, no charge compensation schemes are involved, but nevertheless the lattice is distorted since the sizes of the Ln3+ ions are bigger than the Al3+ ion. The actual positions of the first neighbours of the Ln3+ ion were input in the crystal field parameters equations, through which the conclusions on site symmetry of the optically active ion have been drawn and these results allows the prediction of possible optical activity based on the possibility of the 4f–4f transitions." @default.
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- W2007111186 date "2004-06-01" @default.
- W2007111186 modified "2023-10-17" @default.
- W2007111186 title "Defect simulation and crystal field studies of Ln3+:LiCaAlF6 and LiSrAlF6" @default.
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- W2007111186 doi "https://doi.org/10.1016/j.nimb.2003.12.027" @default.
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