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Study on Photoluminescence Spectroscopy of Sapphire from Penglai, Hainan Province

详细信息

责任者：Yang Qin (School of Physical Science and Technology ; Yangtze University ; Jingzhou 434023 ; China) ; Yang Yong
刊名：Acta Mineralogica Sinica
出版年：2009
卷期：29(4)
关键词：蓝宝石 ; sapphire
页码：p.447-451
图表：5 illus., 21 refs.
分类号：0700
issnNo：ISSN1000-4734
isbnNo：CN52-1045/P

摘要

Coloration mechanism of sapphire from Penglai Town, Hainan Province, was discussed with the method of photoluminescence (PL) spectra. Compared with 500 ～ 700 nm absorption wide spectral band, there are two peaks at 566.8 and 600 nm, and a characteristic peak of Cr³⁺ at 694.2 nm in the 500 ～ 720 nm luminescence spectra of sapphire. The 600 nm shoulder peak is mirror symmetrical to its corresponding absorption peak, and the causes of 566.8 nm narrow peak are complex. The 600 nm shoulder peak could be due to the electron transition of the exchange-coupled Fe²⁺ -Fe²⁺ pair, and the 566.8 nm narrow peak could be due to the sensitization of Si⁴⁺ and Mg²⁺ ions through crystal lattice when Fe²⁺ -Ti⁴⁺ or Fe²⁺ -Fe³⁺ charge transfer bands is activated by 532 nm laser.

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