Doping and calcination effect on nanostructured aluminosilicates processed by sol-gel route S. Simon, M. Tămăşan, T. Radu and V. Simon Eur. Phys. J. Appl. Phys., 55 3 (2011) 30401 Published online: 18 August 2011 DOI: 10.1051/epjap/2011100524