Synthesis and properties of a new family of phases, Li3XYO5: X = Al, Ga; Y = Si, Ge
Abstract
A family of new phases, Li3XYO5, has been synthesised by solid-state reaction. They are all thermodynamically stable, melting incongruently in the range 1165–1250 °C. Electrically, they are insulators and show very low electronic conductivity at high temperatures. Unit cells are orthorhombic, typically 5.4 Å× 15.8 Å× 4.9 Å, with space-group Pnam. The phase diagram of the binary join Li2GeO3–LiAlO2 is given, showing the presence of incongruently melting Li3AlGeO5 and a limited range of LiAlO2 solid solutions.
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