Abstract
Colorless and transparent single crystals of Ca3Sn 2.2Ti0.8Al2O12, which emit bluewhite light under ultraviolet light, were prepared by heating a mixture of oxides and calcium carbonate with a calcium and aluminum-rich composition at 1500 °C. Single crystal X-ray diffraction revealed that the crystal structure is the garnet-type with a cubic cell parameter (a=12.5309(3) Å) and the space group, Ia 3̄d (R1=0.0277, wR2=0.0663, and S=1.367 for all data). The structural formula is presented as Ca3[Sn0.96Ti 0.04]octa[Al0.67Ti0.24Sn 0.09]tetraO12. Polycrystalline solid solutions of Ca3Sn3-xTixAl2O12 were prepared by solid state reaction in air at 1370 °C with nominal titanium contents from x=0.6 to 1.4. The refined unit cell parameter decreased with increasing x. A broad bluewhite emission with a peak wavelength of 465 nm was observed for the solid solutions at room temperature.
Original language | English |
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Pages (from-to) | 965-970 |
Number of pages | 6 |
Journal | Journal of Solid State Chemistry |
Volume | 184 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2011 May |
Keywords
- Garnet structure
- Photoluminescence spectra
- Rietveld refinement
- Single crystal
- X-ray diffraction
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry