Liquidus projection of the Ag-Ba-Ge system and melting points of clathrate type-I compounds

► The liquidus and solidus projection has been constructed for the Ag-Ba-Ge system up to 33.33 at% Ba. ► Eight different primary crystallization fields have been found. ► All the ternary compounds form congruently from the melt. ► The ternary invariant reactions have been determined and are the basis for a Schulz-Scheil diagram.