Although it is well-established that functional electric and magnetic properties are profoundly associated with octahedral tilting within perovskite systems , , , , , the nature of the BO6 octahedral tilt system and the full behavior of the oxygen anions in the relatively new B6TFMO multiferroic system is hitherto unknown. Calculation of the Goldschmidt tolerance factor, t, (see SI section 3) for B6TFMO yields a value of 0.90. The tolerance factor of < 1 indicates favorable octahedral tilting within B6TFMO , , , , owing to divergences between the A-O and B-O interatomic distances.