Cu2 Hg0.57 O9.6 Sr4 V0.43 Maignan A, Pelloquin D, Malo S, Michel C, Hervieu M, Raveau B Physica C 249 (1995) 220-233 Stabilisation of three new oxycarbonates by V and Cr substitutions. The superconductors (Tl,M)1Sr4Cu2(CO3)O7 (M= Cr, V) and (Hg,V)1Sr4Cu2(CO3)O6+z _cod_database_code 1001692 _database_code_amcsd 0015072 3.8505 3.8505 16.23999 90 90 90 P4/mmm atom x y z occ Hg1 0 0 0 .57 V1 0 0 0 .43 Sr1 .5 .5 .1568 Sr2 .5 .5 .3754 Cu1 0 0 .2656 C1 0 0 .5 O1 .5 .5 0 .6 O2 0 0 .1169 O3 0 0 .4166 O4 .675 0 .5 .25 O5 .5 0 .2798