Journal of the American Ceramic Society, Vol.98, No.10, 3352-3360, 2015
Phase Diagramof the Li4GeS4-Li3PS4 Quasi-Binary System Containing the Superionic Conductor Li10GeP2S12
A phase diagram is constructed for the quasi-binary Li4GeS4-Li3PS4 system containing the lithium superionic conductor Li10GeP2S12 (LGPS), having an LGPS-type structure, and the -Li3PS4-type phase, having a thio-LISICON structure. The LGPS and thio-LISICON intermediate compounds are found to exhibit solid solution ranges and show incongruent melting at 650 degrees C and 560 degrees C, respectively. The end-member Li4GeS4 has a compositional range of 0