この資料をSMS送信: Hydrothermal Synthesis, Crystal Structure, and Spectroscopic Properties of Pure and Eu<sup>3+</sup>-Doped NaY[SO<sub>4</sub>]<sub>2</sub> ∙ H<sub>2</sub>O and Its Anhydrate NaY[SO<sub>4</sub>]<sub>2</sub>