Synthesis and Structure of Sr1-xLixCuO2 (0

We studied the possibility of synthesizing infinitelayer (IL) phases of Sr_1-xLi_xCuO₂ (01-xLi_xCuO₂ (0 < x < 1) solid solutions and from the corresponding cuprates, SrCuO₂ and Li₂CuO₂, at high pressures (P = 4–8 GPa) and high temperatures (T = 600–1000°). The optimal conditions for synthesis of the IL phases are P = 4 GPa, T = 800°gr, and = 2 min. At high pressures and temperatures, the components of the SrCuO₂–LiCuO₂ system show limited mutual solubility. Sr_1-xLi_xCuO₂ solid solutions exist at 0 < x < 0.15. The relationship between the unit cell parameters and Li content of highpressure Sr_1-xLi_xCuO₂ phases has been established.