Structural Stability from Crystallographic Shear in TiO$_2$-Nb$_2$O$_5$ Phases: Cation Ordering and Lithiation Behavior of TiNb$_{24}$O$_{62}$

The authors gratefully acknowledge financial support provided by FRM II to perform the neutron scattering measurements at the MLZ, Garching, Germany. K.J.G. thanks the Winston Churchill Foundation of the United States and the Herchel Smith Scholarship for funding.