Brillouin scattering study of transverse elastic waves in the α, incommensurate and β phases of AlPO4 N. Magneron, Y. Luspin, G. Hauret and E. Philippot Eur. Phys. J. B, 3 1 (1998) 7-15 Published online: 15 May 1998 DOI: 10.1007/s100510050278