Citation: Gatta, G. D.; Vignola, P.; McIntyre, G. J.; Diella, V. (2010). On the crystal chemistry of londonite [(Cs,K,Rb)Al4Be5B11O28]: a single-crystal neutron diffraction study at 300 and 20 K Note: neutron diffraction study at T = 20 K. American Mineralogist, 95, pp. 1467-1472.