The relation between crystal structure and luminescence in β-alumina and magnetoplumbite phases
The relation between crystal structure and luminescence in β-alumina and magnetoplumbite phases
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DOI：
10.1016/0022-2313(74)90033-7
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发表时间：
1974-12
影响因子：
3.6
通讯作者：
J. Verstegen;A. Stevels
中科院分区：
文献类型：
--
作者：
J. Verstegen;A. Stevels
Crystallographic data of aluminate and gallate β-aluminas and magnetoplumbites are reviewed. For the XAl11O17and XGa11O17compoundsc/aincreases with increasingrX+. The magnetoplumbites havec/avalues ranging between 3.915 and 3.954 with the exception of BaAl12O19and BaGa12O19. These compounds seem to have strongly distorted magnetoplumbite-derived structures. Upon activation of theMeAl12O19(Me=Ca,SrorBa) lattices with Eu2+and Ce3+, the luminescence properties of Ba containing compounds deviate from the other compounds. This seems to be due to different co-ordinations of the activator ions. Substitution of Mg2+for Al3+in magnetoplumbite phases results in the case of SrAl2O19in changes of thec/aratio, of diffraction intensities and of the luminescence properties. The various data suggest a close similarity of this type of phases and BaAl12O19. In the MeGa12O19series (Me=SrorBa), the quantum efficiency of BaGa12O19: Mn2+was found to be anomalously low.
