Synthesis and Eu luminescence in new oxysilicates, ALa3Bi(SiO4)3O and ALa2Bi2(SiO4)3O [ACa, Sr and Ba] with apatite-related structure |
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Authors: | N. Lakshminarasimhan |
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Affiliation: | Materials Science Research Centre and Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India |
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Abstract: | New oxysilicates with the general formula ALa3Bi(SiO4)3O and ALa2Bi2(SiO4)3O [ACa, Sr and Ba] are synthesized and characterized. Powder X-ray diffraction of these silicates show that they are isostructural with BiCa4(VO4)3O which has an apatite-related structure. Eu3+ luminescence in the newly synthesized oxysilicates show broad emission lines due to disorder of cations. The relatively high intense magnetic dipole transition 5D0→7F1 points to a more symmetric environment. The photoluminescence results confirm that the compounds have apatite-related crystal structure. |
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Keywords: | Apatite Silicate Bi3+ Powder X-ray diffraction IR spectroscopy Photoluminescence Eu3+ |
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