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For example, while Ga3+(r=0.61A) garnets  form for most of the lanthanides (Pr-Lu), REAlO3 perovskites are more stable than RE3Al5O12 garnets for lanthanides larger than Tb3+.
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However£¬taking the design rules for emission color based upon Mg-Si substitution in garnets is generally limited due to garnet phase stablity issues when smaller cations, such as Al or Si occupy the tetrhedral sites.
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bianliu199(½ð±Ò+3): ллʦÐÖŶ 2011-08-20 10:48:14
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