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爱与雨下: 金币+1 2015-06-03 06:36:43
jiayou201101: 金币+20, 翻译EPI+1, ★★★★★最佳答案 2015-06-03 19:01:27
When Mg ion doped into A crystal, it was  starting to take over C and D of A crystal, which were occupied by Dy3+ at first. This leaded to the decrease of effective distribution coefficient of Dy. Besides, the distribution coefficient of Mg in  A crystal was changed with the variation of MgO content.
With the  increase of Mg concentration, between Mg ion and Dy ion would happen repulsive interactions, resulted in the  decrease of effective distribution coefficient of both.
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2楼2015-06-02 22:27:00
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