A premartensitic phase in KAlF4: neutron and X-ray scattering evidences A. Gibaud, A. Bulou, A. Le Bail, J. Nouet et C.M.E. Zeyen J. Phys. France, 48 9 (1987) 1521-1532 DOI: 10.1051/jphys:019870048090152100