Equilibrium open-circuit cell voltage data from a sodium/beta''-alumin
a/phosphorus-sulfur cell utilizing P/S ratios of 0, 0.143, and 0.332 a
nd a sodium atom fraction ranging from 0 to 0.4 were interpreted to co
nstruct ternary phase diagrams of the Na-P-S ternary system at 350 and
400 degrees C.