S. A. Wells, M. T. Dove, M. G. Tucker, N. Phys-;-b)-khosrovani, A. W. Sleight et al., Condens. Matter, vol.14, pp.629-639, 1993.

T. A. Mary, J. S. Evans, T. Vogt, and A. W. Sleight, Science, vol.272, pp.90-92, 1996.

D. Cao, F. Bridges, G. R. Kowach, and A. P. Ramirez, Phys. ReV. B, p.14303, 2003.

, La2-Mo 2O9 cannot be explained the same way since it results from an order-disorder type transition between phases with different symmetries. 18,37 The physical origin of the transition is however comparable to that observed in cubic LAMOX compounds, except that in this last case the random cationic distribution prevents any oxide-ion/vacancy ordering

R. Evans, I. Howard, J. A. Evans, and J. S. , Chem. Mater, vol.17, pp.4074-4077, 2005.