Phase Formation and Structure of (RE,M)2Ca0.5Sr0.5Cu2O6+δ (RE=La,Pr, M=Ca,Sr)

Abstract

Cryst. Res. Technol. 341999 7 837-842The samples of (R E ,M) 2 Ca 0.5 Sr 0.5 Cu 2 O 6+δ are prepared by solid state reaction method. The single phase boundary of R E and M in (R E ,M) 2 Ca 0.5 Sr 0.5 Cu 2 O 6+δ is 1.0~2.0 and 0~1.0 respectively. In (Pr,M) 2 Ca 0.5 Sr 0.5 Cu 2 O 6+δ , the phase boundary of Sr is 0~1.0. The structure of (R E ,M) 2 Ca 0.5 Sr 0.5 Cu 2 O 6+δ belongs to the structure type of 212 cuprate superconductors with space group I4/mmm.