Ba1.7 Ca Cu2 Hg0.67 O7 Sr0.3 V0.33 Knizek K, Malo S, Michel C, Maignan A, Pollert E, Raveau B European Journal of Solid State and Inorganic Chemistry 34 (1997) 1063-1074 Structural evolution and physical properties of the 1212 superconductor series Hg0.7 V0.3 Ba2-x Srx Ca1-y Sry Cu2 O6+d _cod_database_code 1001795 _database_code_amcsd 0012614 3.8643 3.8643 12.445 90 90 90 P4/mmm atom x y z occ Hg1 0 0 0 .67 V1 .1 0 0 .0825 Ba1 .5 .5 .2182 .85 Sr1 .5 .5 .2182 .15 Ca1 .5 .5 .5 Cu1 0 0 .3733 O1 0 .5 .376 O2 0 0 .147 O3 .365 .365 0 .25