“…The applications range from color TV to fluorescent tubes, fiber amplifiers, biological sensors, lasers, scintillators, pc‐LEDS, novel quantum information technology materials, and many more . A number of different compound classes has been investigated as host lattices, such as halides,, phosphates, molybdates, borates, sulfates, silicates, sulfides, oxynitrides, or nitrides , . Optical properties of Eu 2+ and Ce 3+ in different compounds have, for example, been collected by Dorenbos ,…”