The natural phosphorus cycle has been disrupted by human activity, which necessitates the development of new methods for the sustainable production of phosphorus compounds, and efficient recovery and recycling schemes.

Opportunities for green chemistry in the P cycle.

The photostimulated luminescence (PSL) and thermally stimulated luminescence (TSL) of Y2SiO5-Ce3+ and Y2SiO5-Ce3+, Sm3+ is reported and discussed. The PSL measurements show that these compositions are rather efficient X-ray storage phosphors with a short response and decay time (35+or-10ns). A model for the recombination mechanism is suggested on the basis of PSL and TSL measurements.

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