Jb. Mandal et al., NEUTRON-DIFFRACTION STRUCTURAL STUDY OF 1201-SUPERCONDUCTOR (HG0.7CR0.3)SR2CUO4+DELTA, Journal of superconductivity, 9(2), 1996, pp. 253-257
Rietveld analysis of powder neutron diffraction pattern recorded on Sr
-based 1201-phase superconductor (T-c=53 K), (Hg0.7Cr0.3)Sr2CuO4+delta
shows that the oxygen atoms at O(3) site are disordered at x=y=0.3712
. This fourfold split site has a total combined occupancy of similar t
o 80% and is the only occupied site in the (Hg, Cr)O plane.