[No-Show]Probing the luminescent properties of (Ca<sub>1-</sub><i><sub>x</sub></i>Sr<i><sub>x</sub></i>)<sub>8</sub>Mg<sub>3</sub>Al<sub>2</sub>Si<sub>7</sub>O<sub>28</sub>:Ce<sup>3+</sup>/Eu<sup>2+</sup>: A combined experiment and calculation study/2018 International Conference on Solid State Devices and Materials