Ba2 Ce0.15 Cu Hg0.85 O4.15 Letouze F, Huve M, Martin C, Maignan A, Michel C, Hervieu M, Raveau B Materials Research Bulletin 31 (1996) 657-663 Introduction of lanthanide on the mercury site of the HgBa2CuO4 superconductor _cod_database_code 1001755 _database_code_amcsd 0014374 3.8801 3.8801 9.495 90 90 90 P4/mmm atom x y z occ Hg1 0 0 0 .85 Ce1 0 0 0 .15 Ba1 .5 .5 .2985 Cu1 0 0 .5 O1 .5 0 .5 O2 0 0 .202 O3 .5 .5 0 .15