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Laser-induced time-resolved luminescence spectroscopy of Pb²⁺ in minerals

¹ Department of Natural Science, The Open University of Israel, 16 Klausner St., Tel-Aviv 61392, Israel
² University of Toronto, Department of Physics, 60 St. George St., Toronto, Ontario M5S 1A7, Canada
³ Physical Chemistry of Luminescence Materials Laboratory, Lyon 1 University and CNRS, 43 Bd. Du 11 November 1918, F-69622 Villeurbanne, France
⁴ Department of Inorganic and Analytical Chemistry, Hebrew University, Jerusalem 91940, Israel

^* Corresponding author, e-mail: michael{at}oumail.openu.ac.il

Natural and synthetic samples of hardystonite, hydrozincite, calcite and pyromorphite were investigated by laser-induced time-resolved luminescence spectroscopy at 50 K to ambient temperatures. Luminescent bands of Pb²⁺ can be resolved from similar bands caused by Ce³⁺ and Eu²⁺ by a combination of diagnostic differences in excitation spectra and lifetimes of luminescence as a function of temperature. The results indicate that Pb²⁺ is a more common luminescent activator in minerals than hitherto suspected.

Key-words: time-resolved luminescence spectroscopy, Pb²⁺, minerals..

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