PRECURSOR COMPOUND AND CRYSTALLISED COMPOUND OF THE ALKALINE-EARTH ALUMINATE TYPE, AND METHODS OF P

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The invention relates to an alkaline-earth-aluminate-type compound which is at least partially crystallised such as in the form of a beta- or tridymite-type alumina Said compound can be used as phosphor in plasma-type screens or in trichromatic lamps, backlights for liquid crystal displays or plasma excitation lighting or in light-emitting diodes. The invention also relates to a precursor compound of the aforementioned compound.