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Crystal structure of BaMg2Si2O7 and Eu2+ luminescence

✍ Scribed by Cheol-Hee Park; Yong-Nam Choi

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 880 KB
Volume: 182
Category: Article
ISSN: 0022-4596
DOI: 10.1016/j.jssc.2009.05.002

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✦ Synopsis

Crystal structure of BaMg 2 Si 2 O 7 was determined and refined by a combined powder X-ray and neutron Rietveld method (monoclinic, C2/c, no. 15,

The structure contains a single crystallographic type of Ba atom coordinated to eight O atoms with C 1 (1) site symmetry. Under 325-nm excitation Ba 0.98 Eu 0.02 Mg 2 Si 2 O 7 exhibits an asymmetric emission band around 402 nm. The asymmetric shape of the emission band is likely associated with a small electron-phonon coupling in BaMg 2 Si 2 O 7 . The integrated intensity of the emission band was observed to remain constant over the temperature range 4.2-300 K.

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