The VUV−vis spectroscopic properties of Gd3+ in Na(Y,Gd)FPO4 are reported. The photon cascade emission was observed under 8S7/2 → 6GJ excitation in which 6GJ → 6PJ, 6IJ emissions of Gd3+ in the orange/red and near-IR range are followed by ultraviolet emission of 6PJ → 8S7/2 transitions. We demonstrate systematically the emission decays and concentration-quenching characteristics of 6GJ → 6PJ and 6PJ → 8S7/2 transitions under excitation into 6GJ levels. The effect of temperature on the 6GJ → 6PJ emissions is also presented.
