Hydrurofluorures ioniques MF2−xHx (M = Sr,Ba): Synthèse et étude structurale par diffraction des neutrons

The study of the substitution of H^? for F^? ions in SrF₂ and BaF₂ has shown the existence of the cubic hydride fluorides MF_2?xH_x (M = Sr, Ba). The variation of the lattice parameter with hydrogen replacement is stronger than it is in the case of CaF_2?xH_x. The upper limit of substitution diminishes for the series calcium, strontium, barium. Neutron diffraction confirms the simple structural model, already proposed for calcium hydride fluoride: a fluorine cubic structure with a statistical distribution of H^? and F^? on 8(c) sites.