Publication Date:
2015-07-09
Description:
A phase diagram is constructed for the quasi-binary Li 4 GeS 4 –Li 3 PS 4 system containing the lithium superionic conductor Li 10 GeP 2 S 12 (LGPS), having an LGPS-type structure, and the β-Li 3 PS 4 -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°C and 560°C, respectively. The end-member Li 4 GeS 4 has a compositional range of 0 〈 k 〈 0.3 in [(1− k ) Li 4 GeS 4 + k Li 3 PS 4 ], while the other end-member γ-Li 3 PS 4 has no solid solution range. The crystal structures appearing in the binary systems are the α-, β-, and γ-type Li 3 PS 4 structures and the LGPS-type structure, and these are formed by PS 4 tetrahedra with different arrangements in each structure. The phase and structural relationships between the compounds appearing in the Li 4 GeS 4 –Li 3 PS 4 system are thus clarified.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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