Polymorphism and chevron layer structure of an antiferroelectric liquid crystal studied by X-ray diffraction P. Cluzeau, P. Barois, H. T. Nguyen and C. Destrade Eur. Phys. J. B, 3 1 (1998) 73-82 Published online: 15 May 1998 DOI: 10.1007/s100510050285