Phase relation in Li2MoO4–Li2WO4 system

The compounds Li2MoO4 and Li2WO4 have the phenacite structures with almost the same lattice constants. It is expected and was actually reported that the Li2MoO4–Li2WO4 quasi-binary system forms a complete solid solution. In the present study, however, we found by differential thermal analysis (DTA) that the system actually forms a partial solid solution with the peritectic reaction.