✦ LIBER ✦

Synthesis and Eu3+ luminescence in new oxysilicates, ALa3Bi(SiO4)3O and ALa2Bi2(SiO4)3O [ACa, Sr and Ba] with apatite-related structure

✍ Scribed by N. Lakshminarasimhan; U.V. Varadaraju

Publisher: Elsevier Science
Year: 2005
Tongue: English
Weight: 285 KB
Volume: 178
Category: Article
ISSN: 0022-4596
DOI: 10.1016/j.jssc.2005.08.006

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✦ Synopsis

New oxysilicates with the general formula ALa 3 Bi(SiO 4 ) 3 O and ALa 2 Bi 2 (SiO 4 ) 3 O [A¼Ca, Sr and Ba] are synthesized and characterized. Powder X-ray diffraction of these silicates show that they are isostructural with BiCa 4 (VO 4 ) 3 O which has an apatiterelated structure. Eu 3+ luminescence in the newly synthesized oxysilicates show broad emission lines due to disorder of cations. The relatively high intense magnetic dipole transition 5 D 0 -7 F 1 points to a more symmetric environment. The photoluminescence results confirm that the compounds have apatite-related crystal structure.

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