J. Amoroso, K. Brinkman, M. Tang and J. Marra, Investigations into Melt Processed Waste Forms For Nuclear Waste Immobilization: Single Phase Cs Containing Hollandite Compositions of the form Ba1.0Cs0.3A2.3Ti5.7O16; A = Cr, Fe, Al, Journal of Alloys and Compounds, 2013, 548, 590-599.