Crystal Structure of SrAl2B2O7 and Eu Luminescence |
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| Authors: | F Lucas S Jaulmes M Quarton T Le Mercier F Guillen C Fouassier |
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| Institution: | a Laboratoire de Cristallochimie du Solide, Université Pierre et Marie Curie-Paris 6, 4 place Jussieu, 75252, Paris Cedex 05, France;b Institut de Chimie de la Matière Condensée de Bordeaux, Université Bordeaux 1, 162 Avenue du Dr A. Schweitzer, 33608, Pessac Cedex, France |
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| Abstract: | The crystal structure of strontium dialuminodiborate SrAl2B2O7 has been established by single-crystal X-ray diffraction methods. The compound crystallizes in the trigonal system (space group R
c, Z=6) with cell parameters a=4.893(1) Å and c=47.78(1) Å. Aluminium and boron atoms are, respectively, in tetrahedral and triangular oxygen coordination. The assembly of Al2O7 units and BO3 triangles forms double layers between which Sr2+ ions are located. The Eu2+-doped crystalline powder exhibits a luminescence band with maximum at 415 nm. Luminescence characteristics are compared to those of other strontium borates. |
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| Keywords: | borates oxides crystal structure Eu2+ luminescence optical materials |
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