Elucidation of Structural Features and Photoluminescence Properties for Hydrothermally-synthesized γ-KEu(MoO<sub>4</sub>)<sub>2</sub> Microcrystal Phosphor with Metastable Orthorhombic Structure and Differences of Luminescence Properties by Structure Transition Due to Y<sup>3+</sup>-dilution
New journal of chemistry