A new experimental method for studying phase separation through neutron diffraction: the case of As-rich liquid alloys in the As–S system

Abstract Neutron scattering experiments were performed on liquid mixtures in the composition range of the miscibility gap in the As-rich side of the As–S system. For each experiment, a special device enabled us to record the diffraction spectra from the upper and the lower parts of the liquid sample. The existence of nanometric-range phase separation was confirmed and the local order of each of the two demixing phases was determined.