ChemInform Abstract: Trivalent Cation‐Controlled Phase Space of New U(IV) Fluorides, Na3MU6F30 (M: Al3+, Ga3+, Ti3+, V3+, Cr3+, Fe3+): Mild Hydrothermal Synthesis Including an in situ Reduction Step, Structures, Optical, and Magnetic Properties. Issue 17 (April 2015)