
The luminescence properties of calcium molybdate are reported. Two emission bands are observed, one in the green and another in the orange spectral region. The shorter wavelength emission band is assigned to the 3T1 1A1 transition in the tetrahedral molybdate group. The longer wavelength band is ascribed to a similar transition in a molybdate group lacking an oxygen ion, i.e. a MoO3 group. Similar observations are made in the case of calcium tungstate. Es werden die Lumineszenzeigenschaften von Kalziummolybdat mitgeteilt. Zwei Emissionsbanden werden beobachtet, eine im grunen, die andere im orangen Spektralbereich. Die Emissionsbande mit der kurzeren Wellenlange wird dem 3T1 1A1-Ubergang in der tetraedrischen Molybdatgruppe zugeordnet. Die Bande mit der langeren Wellenlange wird einem ahnlichen Ubergang in einer Molybdatgruppe, in der ein Sauerstoffion fehlt, d. h. einer MoO3-Gruppe, zugeschrieben. Ahnliche Beobachtungen werden fur den Fall des Kalziumwolframats gemacht.
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