Abstract
The time-resolved laser-induced luminescence of natural barite BaSO4 is compared with synthetically prepared BaSO4-Bi, BaSO4-Ag and BaSO4-Cu. It is deduced that in natural barite the narrow orange band with λmax = 625 nm, Δ = 40 nm and τ = 5 μs is connected with Bi2+ center. The narrow violet band with λmax = 625 nm, Δ = 35 nm and τ = 1.7 ms is connected with Bi3+ center. The broad red band with λmax = 635 nm, Δ = 140 nm and τ = 270 μs is connected with Ag+ center. The broad red band with λmax = 750 nm, Δ = 110 nm and τ = 350 μs is connected with Cu+ center. Such luminescence centers are firstly considered in minerals.
Original language | English |
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Pages (from-to) | 279-290 |
Number of pages | 12 |
Journal | Optical Materials |
Volume | 16 |
Issue number | 1-2 |
DOIs | |
State | Published - 2001 |